The best solar generator for power outages is a battery power station that stores energy from solar panels, a wall outlet or a car socket, then pushes it back out through AC outlets, USB ports and a 12V car socket as ordinary household electricity. Unlike a gas generator there is no fuel, no exhaust and no carbon monoxide, so it can run in a closed room, a garage or a bedroom without anyone worrying about fumes.
We spent weeks working through ten of the most capable units on the market for outages specifically, not for camping. That distinction matters: the useful question is not how many ports a box has, but how long it holds a refrigerator, whether it survives a fridge’s startup surge, and whether it will still hold a charge after sitting in a closet through August.
Outages also get longer than people expect. A grid flick that lasts ninety minutes and a storm outage that lasts three days are solved by completely different sizes of battery. Below we rank all ten by how well they handle the loads an outage actually throws at them, then show you the math for sizing your own.
One thing to know before reading: prices move constantly, so every listing here links out and shows the current figure rather than repeating a number that will be wrong within a week.
Table of Contents
Top 3 Solar Generators for Power Outages (October 2026)
Anker SOLIX C1000 Gen 2
- 2000W output from 1024Wh
- 10ms UPS switchover
- full recharge in 49 minutes
All 10 Solar Generators Compared for Power Outages in 2026
| Product | Specs | Action |
|---|---|---|
| Anker SOLIX C1000 Gen 2 |
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| BLUETTI Elite 200 V2 |
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| OUPES Mega 1 |
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 BLUETTI Elite 100 V2 |
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 Jackery Solar Generator 1000 v2 |
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 EF ECOFLOW DELTA Pro |
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 GRECELL 2400W |
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 Jackery HomePower 3000 |
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 Anker SOLIX S2000 |
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 GRECELL 500W |
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How We Chose These Solar Generators
Every unit here was judged on five things, in this order: usable battery capacity for outage loads, continuous AC output, surge headroom, standby behaviour over days, and the number of owner reviews behind the rating. We weighted usable capacity heavily because it is the number most often overstated in listings.
We also read the specification sheets against the customer feedback rather than trusting either alone, which is how we caught two units whose bundled solar panels are far smaller than the solar input the station can accept. Where a manufacturer lists a runtime in minutes, we treat it as a charge-speed figure, not endurance.
Limits worth stating plainly: we did not bench-test these units under laboratory load, so our runtime figures come from published specifications and owner reports rather than our own wattmeter. We also excluded units built around NMC chemistry, since those are a poorer fit for emergency storage.
1. Anker SOLIX C1000 Gen 2: the best all-round solar generator for outages
Anker SOLIX C1000 Gen 2 Portable Power Station
1024Wh LiFePO4
2000W rated and 3000W peak
10ms UPS switchover
4000 cycles
Pros
- Full recharge in 49 minutes
- Covers a mini fridge for nearly two days
- 10ms UPS suits CPAP and router backup
- Compact enough to move between rooms
Cons
- Gen 2 dropped the expansion battery modules from Gen 1
- No protective case included
- Measured harmonic distortion on microwave loads
This is the unit I keep coming back to for a typical outage. The C1000 Gen 2 pairs 1024Wh of LiFePO4 storage with 2000W of continuous output, which is enough headroom for a refrigerator, a router, lights and a CPAP machine all running at once without any of them browning out when the fridge compressor kicks in.
The charging speed is the part that changes how you use it during a storm. Its 1600W HyperFlash input refills the whole battery in 49 minutes, among the quickest we found, so if you get grid power back for even a short window you can top it off before the next outage. Fifteen minutes on the wall is enough to cover a full night of CPAP use.
Owners report running a mini fridge for close to two days and a CPAP machine for three nights on a single charge, and several describe moving the unit between the bedroom and the living room as needed. The under-10ms UPS switchover is short enough that a desktop PC or a medical device never notices the switch.
Two things to keep in mind. Gen 2 removed the expansion battery modules offered on the first generation, so 1024Wh is the ceiling here for good. A power engineer reviewer also measured 15 to 20 percent harmonic distortion driving a microwave, which is fine for a fridge and worth knowing before you plan to run an appliance with sensitive electronics.
How it handles medical devices and a nighttime outage
If your concern is a CPAP machine or an oxygen concentrator, the 10ms switchover and the pure sine wave output are the deciding factors here. Owners running three consecutive nights on one charge report a comfortable margin over a typical eight-hour night.
The 4000-cycle battery rated to 80 percent retention means roughly a decade of daily use before it needs replacing, which matters if you intend to keep this as a permanent preparedness item rather than a seasonal one.
Where it falls short
Because expansion modules are gone, this is a fixed 1kWh of storage. If you want to ride out a three-day storm without wall power, you need one of the larger units further down this list instead.
The 600W solar input ceiling also means a multi-day solar-only recharge takes more than a day of good sun even with a large portable array.
2. BLUETTI Elite 200 V2: the best solar generator for a multi-day outage
BLUETTI Elite 200 V2 Solar Generator & 2x200W Solar Panel Included 2073.6Wh
2073.6Wh LiFePO4
2600W rated and 3900W Power Lifting
6000+ cycles
10W standby draw
Pros
- Runs freezers and fans together for 24+ hours
- 2600W inverter handles an air fryer and pressure cooker at once
- 10W standby draw extends standby runtime
- Refills to 80 percent in 50 minutes on dual charging
Cons
- Solar input capped at 60V and 1000W
- No expansion with BLUETTI battery modules
- App lacks custom charge limits
- 53.4 lb body
This is the one I would want if the forecast is naming a named storm. At 2073.6Wh with a 2600W inverter, the Elite 200 V2 has roughly double the storage of most of this list and enough continuous output to run an air fryer and a pressure cooker at the same time.
The battery is CNAS-certified automotive-grade LiFePO4 rated at 6000 plus cycles, which works out to a 17-year projected lifespan. That cycle figure is well ahead of most of this list, and for a device expected to sit ready for years it is a real advantage.
Owner reports include two deep freezers, a refrigerator and several fans running together for more than 24 hours, and one review describes it as the best inverter behaviour the owner has measured across several BLUETTI units. The 10W standby draw is roughly a third of comparable units, which directly extends how long the station stays ready while parked on standby.
The 15ms UPS is fast enough for routers, computers and medical equipment. Owners also note that the long press-and-hold buttons prevent accidental activation while the unit is in transit, a small detail that matters when you are moving 53 pounds around.
Why it earns the premium slot
Capacity and inverter strength together are what separate this from the 1kWh units. If your outage plan includes a freezer, a refrigerator, lights and a router for two to three days, this is the smallest unit on the list that handles it comfortably without wall charging.
The included 400W solar kit refills it fully in about 5.5 hours in good sun, and a 1000W array does it in 2.4 hours, so the recharge side scales if you invest in more panels.
Where it falls short
The MPPT solar input is capped at 60V and 1000W, so very large arrays will not charge faster no matter what you connect. Owners also note the app lacks custom charge rates and hard charge limits, which power users will notice.
Unlike the OUPES below, this unit cannot be expanded with external BLUETTI battery modules, and 53.4 pounds takes two hands to lift.
3. OUPES Mega 1: the best value solar generator for a blackout
OUPES Mega 1 Solar Generator with 100W Panel Included, 2000W 1024Wh LiFePO4
1024Wh expandable to 5120Wh
2000W pure sine wave
under 20ms UPS
13 ports
Pros
- 2000W of pure sine wave output in 27.8 lb
- 0-80 percent AC recharge in 36 minutes
- Under 20ms UPS keeps sensitive electronics alive
- Expands to 5kWh with two battery modules
Cons
- Included 100W panel is small for an 800W solar input
- Runtime field lists charge speed rather than endurance
The Mega 1 is the configuration we recommend when someone wants 2000W of output but not a 2kWh battery. At 1024Wh with 2000W of pure sine wave AC, it delivers more continuous power than most of the 1kWh units here while staying under 30 pounds.
It is also one of the few units in this group that can grow. Two B2 extra batteries take the base capacity to 5120Wh, which turns a one-night blackout unit into something that can carry a household for a couple of days. That expandability is the reason we rate it above cheaper 1kWh alternatives.
Charging is unusually quick for the class: 0 to 80 percent in 36 minutes on AC, or 26 minutes when you combine wall and solar. Thirteen ports including two 100W USB-C PD outputs cover laptops, tools and phones without adapters, and owners cite the under-20ms UPS as the reason their computers never dropped during a switchover.
The most repeated complaint is the bundled solar panel. At 100W it is a token panel, and this unit can accept up to 800W of solar input, so plan to buy a real array rather than relying on the one in the box.
Why it beats cheaper 1kWh options
The 2000W ceiling is the deciding number. Most sub-1kWh stations sit at 800 to 1000W, which rules out a microwave, a space heater or most power tools. At 2000W this one handles the appliances people actually reach for when the lights go out.
It also supports a 5-year warranty, which is longer than the two-year terms on the GRECELL units in this list.
Where it falls short
1,024Wh base capacity is a one-night budget, not a multi-day one. Two heavy loads like a refrigerator and a space heater together will drain it faster than most people expect.
Reviewers also note the product listing shows 36 minutes in the runtime field, which reflects charge speed rather than discharge endurance. Treat it as what it is.
4. BLUETTI Elite 100 V2: the best solar generator for small spaces and apartments
BLUETTI Solar Generator Elite 100 V2 with 200W Solar Panel Included, 1024Wh
1024Wh LiFePO4
1800W rated plus 2700W Power Lifting
70 minute full recharge
11 ports
Pros
- Power Lifting runs a 1200W space heater for close to an hour
- XT-60 DC inputs are a clear step up from the older connector style
- Runs a 32 qt 12V fridge about 24 hours
- Bright display shows exact wattage in and out
Cons
- 25 lb weight is heavy for this capacity class
- Panel needs frequent repositioning
- Display shows aggregate watts only
The Elite 100 V2 is the same 1kWh capacity as the Anker above but with a different emphasis: a heavier inverter. Its 1800W rated output plus 2700W in Power Lifting mode means it can run a 1200W space heater, which is one of the first things people try and one of the first things smaller units refuse.
Owners report close to an hour of heating from Power Lifting, and one review describes running a 32 qt 12V fridge for about 24 hours per charge. True pass-through charging means the fridge keeps running while the battery tops up from solar.
BLUETTI has clearly learned from earlier complaints here. The XT-60 DC input connectors are a clear step up from the older 7909 style, which owners single out as the reason this is a step up from previous units, and the 10ms UPS handles routers and PCs without a blink.
Charging is fast: a full recharge in roughly 70 minutes on 1200W AC, and 0 to 80 percent solar in about 4 hours from the bundled 200W panel with up to 1000W of solar input supported.
Who this suits in an apartment or small house
If you are in a unit where a gas generator is not an option, or you simply want something you can carry up a flight of stairs without planning ahead, 25 pounds and a handle are still workable. It fits behind a couch or in a hall cupboard, which a 50-pound station does not.
The 30dB silent mode matters at night in close quarters, where a fan that drones is a complaint you will hear about rather than read about.
Where it falls short
Twenty-five pounds is on the heavy side for a 1kWh unit, and the bundled panel needs frequent repositioning to stay aligned with the sun, which is fiddly in wind.
The display reports aggregate wattage only, not separate amps and volts, so anyone diagnosing a marginal load has less to work with than the Anker provides.
5. Jackery Solar Generator 1000 v2: the best bundled panel in a carryable package
Jackery Solar Generator 1000 v2 and 200W Solar Panel,1070Wh,1500W AC
1070Wh LiFePO4
1500W rated and 3000W surge
23.8 lb
200W panel included
Pros
- Runs a full-size side-by-side fridge for roughly 9 hours
- Light enough for one person to carry
- Panel and station can charge and output at the same time
- 5 year manufacturer coverage
Cons
- Bundled 200W panel sags without propping
- Panel cable is short for shading the battery
- 1-hour charge mode is hidden in the app
- V2 marking is nearly invisible
This is the pick for someone who wants a solar generator in one box rather than a shopping list. The station and a 200W folding panel arrive together, and 1070Wh of LFP storage with 1500W of AC output is a genuinely capable outage package for a fridge, router and lights.
It is also the lightest of the 1kWh-plus units here at 23.8 pounds, with a foldable handle and a footprint that fits in a midsize truck. That matters when you are moving a battery from a garage to a kitchen at four in the morning.
Owner reviews consistently describe roughly 9 hours of full-size side-by-side refrigerator runtime on a full charge, and the color display shows input and output clearly enough to diagnose a misbehaving appliance. Rated at 4000 plus cycles, the battery is specified for a 10-year-plus lifespan.
Charging is flexible: 80 percent from the 200W panel in about 6 hours, an emergency 1-hour mode from the wall, and 3 hours on a 600W alternator connection. Two 24V solar inputs mean you can add a second panel if one is not enough.
Where the bundle earns its place
For a first-time buyer the single-box appeal is real. Competitors often bundle a 100W panel or none at all, and this one gives you 200W to start, which is enough to keep a 1kWh battery roughly topped up across a long sunny day.
Three pure sine wave AC outlets plus two USB-C, one USB-A and a car port cover the loads an outage actually produces.
Where it falls short
The bundled panel draws consistent complaints. It sags in the middle unless propped, and the cable is too short to keep the battery in shade while the panel sits in sun, which matters on a hot day.
The fastest 1-hour charge mode must be switched on in the app and, per the manufacturer, shortens battery lifespan if used constantly. One owner also found the V2 marking nearly invisible on the unit, a good reminder to check you received the updated model.
6. EF ECOFLOW DELTA Pro: the best solar generator for whole-home backup
EF ECOFLOW Portable Power Station 3600Wh DELTA Pro, 120V 3600W AC Output
3600Wh LFP expandable to 25kWh
3600W AC and 4500W with X-Boost
15 outputs
Pros
- Ran a fridge
- furnace blowers
- lights and internet through a multi-day outage
- Five 120V AC outlets avoid extension cord juggling
- Recharges from a gas generator in a couple of hours
- 23 percent solar conversion efficiency
Cons
- 99 lb is by far the heaviest here
- Solar input limited to 15 amps
- Arrives only partly charged and tripped a breaker on first use
When the outage is measured in days rather than hours, capacity becomes the whole argument. The DELTA Pro carries 3600Wh and 3600W of continuous AC output, and it expands to 25kWh with additional batteries or Smart Generators, which makes it the closest thing on this list to whole-home backup.
Fifteen outputs including five AC outlets mean a household can run a refrigerator, furnace blowers, lights, internet and computers without chaining extension cords through the house, which is the single most common complaint about gas-generator setups.
Owners describe it replacing a gas generator outright, noting how quiet it is and how it cut fuel use. It also recharges from a gas generator in a couple of hours, so a hybrid approach is possible if you already own one. The published solar conversion efficiency is 23 percent, which is high for this class.
Business users running heat presses report no voltage drops under commercial loads, and EcoFlow support has replaced a unit under warranty for at least one owner.
When this size is the right call
If your outage plan includes heating controls, a well pump or more than one refrigerator, the smaller units will not carry it. This one fills a furnace blower, a fridge and lighting without you having to decide what to switch off.
It also accepts five charging inputs including EV station charging, which means an EV on solar can top it up during an extended event.
Where it falls short
Ninety-nine pounds is genuinely heavy and needs the extendable handle to move at all. If you are the sort of person who needs to carry the battery between rooms, that rules it out.
Solar input is limited to 15 amps, which restricts how large an array you can attach, and some reviews report units arriving only partly charged and tripping a breaker on the first outlet they tried. A couple of one-star reviews cite error 121 overload faults with limited support, which is worth weighing against the many positive multi-day outage reports.
7. GRECELL 2400W: the best solar generator for jobsites and workshops
2400W Portable Power Station 1843.2Wh Solar Generator For Home Battery
1843.2Wh LiFePO4
2400W continuous AC
12 outputs including a 10W wireless pad
105W solar and DC input
Pros
- 2400W of continuous AC at a 1.8kWh capacity
- Ten outlets plus a 10W wireless charging pad for phones on site
- Refills from half full in about 90 minutes
- Owners in their 50s report carrying it by the side handles
Cons
- Solar and DC input capped at 105W
- AC power brick restricts loads during pass-through charging
- Only a 24-month warranty
The GRECELL 2400W is an unusual shape: a large 1843.2Wh battery paired with 2400W of continuous output and only a 24-month warranty. Owners buying it for outage prep repeatedly compare the result favourably against larger brands, and one review describes running a Ninja woodfire grill for nearly two hours with about 60 percent remaining.
Its calling card is the port count. Four AC outlets, two USB-A, two USB-C, two DC and a car port sit alongside a 10W wireless charging pad, which is genuinely useful when everyone on site is trying to charge a phone and you have no spare outlets.
A lighting-focused owner reports two lamps running for 9 hours with 40 percent still in reserve, which is a fair illustration of how the unit behaves on small continuous loads. Overcharge, temperature and low-battery protection are built in, and the 16.9 by 11.9 by 11.1 inch footprint is easier to load than the number suggests.
Two handles on the sides allow a two-handed carry, and several owners in their 50s specifically note they can manage it. That is a more meaningful data point than the weight alone.
Best used where the load is predictable
For a workshop, a market stall or an outdoor event where the loads are known and modest, 2400W of continuous output is generous and the low standby behaviour pays off over a long evening.
It also refills from half empty in around 90 minutes on wall power, so a short grid window is enough to restore most of the capacity.
Where it falls short
Solar and DC input are both capped at 105W, and charging runs around 15 percent per hour. If you plan to recharge mainly from panels, this is the wrong unit regardless of its capacity.
The AC power brick restricts what you can run while pass-through charging is happening, and a 24-month warranty is well short of the 5-year terms most competitors here offer.
8. Jackery HomePower 3000: the best solar generator for RV and camper use
Jackery HomePower 3000 and 2x200W Solar Panels, 3072Wh, 3600W AC Output
3072Wh LiFePO4
3600W rated and 7200W surge
UL-certified UPS
TT-30 RV port
Pros
- Powers a refrigerator for 1-2 full days on one charge
- Runs a camper air conditioner and microwave together quietly
- Full charge in about 2 hours from the wall
- TT-30 RV port simplifies hookups
Cons
- 59.5 lb body needs a wheel kit
- Battery cannot be expanded with extra packs
- Minimum UPS load threshold is not documented
- Alexa integration was promoted but is not available
If your outage happens in a camper or an RV, this is the one built for it. The TT-30 RV port means you plug in directly instead of running an adapter, and 3072Wh with 3600W of continuous output is enough to run a refrigerator, a microwave and a rooftop air conditioner at the same time.
Owners report exactly that combination running quietly, with a refrigerator holding for a full day or two on one charge. Full recharge takes about 2.2 hours from the wall, or 1.7 hours on hybrid AC and DC.
The UL-certified UPS switches over in under 20ms, so a laptop or a router plugged in will not notice an outage. Two 100W USB-C PD ports cover modern devices, and the app lets you shut the unit down remotely and monitor energy flow, which helps you size extra solar.
The 0 to 80 percent solar figure of about 9 hours from two bundled 200W panels is realistic for good sun, and the CTB packaging design makes it smaller and lighter than most 3kWh units.
Why RV owners like it
The combination of RV port, silent operation and genuine air-conditioner headroom is rare. Most units under 2kWh simply cannot start a camper air conditioner, and this one handles it alongside other loads.
For home use, a full-size refrigerator running for one to two days is a reasonable outcome for a 3072Wh battery once you account for real losses.
Where it falls short
At 59.5 pounds you will want a wheel kit; this is not a unit you carry up stairs. The battery also cannot be expanded with extra packs, which caps long-term flexibility.
Some documentation gaps bother reviewers: the minimum UPS load threshold is not stated, and Alexa integration was promoted but is not actually available. One detailed review also reports the support channel offering little help.
9. Anker SOLIX S2000: the best solar generator for long refrigerator runtime
Anker SOLIX S2000 Portable Power Station, 2,010Wh, 1,500W
2010Wh LFP
1500W rated and 3000W peak
35 hour fridge runtime
10000 cycles
Pros
- Carried a household through a 30-hour outage
- Only 3W draw in UPS mode
- Refrigerated a 220L fridge for roughly 33-35 hours
- 30 percent smaller than the category average
Cons
- Cooling fan drones at 1200W charging speeds
- Strong chemical odor on first charge
- No 12V DC port on the unit
- Recessed handles rather than true carry handles
The S2000 is built around a single goal: keeping a refrigerator alive for as long as possible. At 2010Wh with about 6W of idle draw, it delivers roughly 35 hours of fridge runtime, the longest published fridge endurance we found for a unit under 2kWh, with owners reporting 33 to 35 hours with a 220L fridge.
Its idle draw of about 3W in UPS mode is lower than a small conventional UPS, which is why the runtime holds up in practice rather than in a spec sheet. One owner carried a household through a 30-hour outage without issue.
The battery is rated at 10000 cycles, the highest cycle figure in this group, with a stated 15-year lifespan. At 8.2 by 11.1 by 12.7 inches it is far more compact than most 2kWh units, though 35.7 pounds still means a deliberate lift.
Eight outlets across front and rear banks keep cabling tidy, and six recharge methods including 400W solar input mean you are not dependent on a wall socket. Owners note it is very quiet in most conditions.
Best for one appliance, done properly
If your priority is a refrigerator and a freezer holding temperature for two days with everything else off, this is the most efficient design here. The 2kWh class does not automatically give you two days; the low idle draw is what makes it work.
The compact footprint also makes it one of the easier 2kWh units to keep in a garage rather than a corner of a room.
Where it falls short
1500W continuous output is lower than several cheaper units, so a microwave plus a fridge plus anything else will hit the ceiling. There is also no 12V DC port, which car-oriented buyers will miss.
Two physical complaints recur: the cooling fan becomes noticeably droning at 1200W charging speeds, and the recessed handles are not real carry handles for a 35-pound box. One owner also reports a strong chemical burn-off odor on the very first charge.
10. GRECELL 500W: the best budget solar generator for an apartment or car
Portable Power Station 500W, 519.48Wh/140400mAh Solar Generator Backup
519Wh
500W pure sine wave AC
18 lb
10 outputs including 60W USB-C
Pros
- Genuinely portable at 18 pounds with a compact cube footprint
- 10 output ports is unusual at this size
- Pure sine wave output protects laptops and CPAP machines
- Three recharge paths including car charging
Cons
- 500W ceiling rules out heating and large appliances
- 519Wh gives about an hour at full load
- DC5521 adapter is a proprietary connector
- 24-month warranty is short
This is the honest answer for anyone who does not need a refrigerator. At 519Wh and 18 pounds it is a genuine carryable unit, and the pure sine wave inverter means laptops and CPAP machines run cleanly, which is more than many budget boxes can say.
Ten simultaneous outputs including two AC, three USB-A QC3.0, a 60W USB-C PD port, two DC outputs, a car port and a 10W wireless charger is a lot of flexibility for the smallest unit here.
It also recharges three ways, wall, car and solar, and the included cable storage bag keeps the accessories from tangling in a drawer. Buyers consistently frame it as an entry-level or travel backup rather than a household system, and at that framing it works.
The battery management system covers temperature, overvoltage, overcurrent and short circuit protection, which is the sort of detail that matters if it is going to sit unattended during an outage.
What 519Wh actually covers
Think of it as a night of essential power rather than a day. A CPAP machine, a router, a couple of lamp fixtures and phone charging for a household is realistic. A refrigerator is not.
Users on CPAP machines report roughly 5 to 6 hours of runtime from units in this 400 to 500Wh range, so plan an overnight swap or a wall recharge if sleep is the priority.
Where it falls short
The 500W ceiling rules out space heaters, water heating and any large appliance, and at full load 519Wh lasts about an hour. That is the capacity limit rather than a quality problem.
The included DC5521 adapter uses a proprietary 7.9mm connector that may not fit panels from other brands, and the 24-month warranty is short against the 5-year coverage most competitors in this list carry.
What to Power First When the Lights Go Out
Almost everyone over-plans. The instinct is to keep everything on until the inverter complains, then shut things off in a panic. A better approach is to rank loads before the outage and decide in advance what stays connected.
Start with anything medically necessary, such as a CPAP machine, oxygen concentrator or refrigerated medication. Then refrigeration, since a refrigerator that stays closed holds temperature for hours on its own insulation and does not need power immediately.
Next come communications and light: the Wi-Fi router, a couple of LED lamps and phone chargers. Then the discretionary loads, which is where people usually start by switching things back on.
A practical rule is to keep continuous loads below half your rated output and to leave the surge headroom free for motors. A refrigerator drawing about 150W while running can pull 600W for a few seconds at startup, so running a fridge and a space heater on a 1000W inverter is asking for a shutdown even though the steady-state load looks modest.
How to Size a Solar Generator for a Power Outage
Size by watts first, then by watt-hours. Watts determine what the inverter can run at one moment; watt-hours determine how long it runs. Buying a large output with small capacity gives you a powerful unit that dies in an hour. Buying large capacity with small output gives you a long-running unit that cannot start a compressor.
Add up the running watts of everything you plan to run, then add 25 to 30 percent headroom for startup surges. If you are unsure about a specific appliance, its nameplate wattage is printed on the back or bottom and is usually higher than you expect.
Then divide your required watt-hours by a realistic capacity factor. A 1024Wh unit does not deliver 1024Wh to your appliances. Apply roughly 0.90 for depth of discharge and about 0.85 for inverter and conversion losses, and you land near 76 percent, or about 780Wh of usable energy. On a 2073.6Wh unit that is roughly 1570Wh usable.
For context, a refrigerator typically draws about 150W while running and needs a surge well above that to start. A freezer runs closer to 100W. A Wi-Fi router and a laptop charger together sit around 40W. A CPAP machine is usually around 40W, so a 500Wh unit covers roughly five to six hours of sleep. A microwave can pull 1000W or more for a minute at a time.
Once you have your list, match the total watts to rated output and the total watt-hours to usable capacity. That is the entire sizing exercise, and it takes five minutes.
Solar Panel Sizing and Recharge Time for a Multi-Day Outage
Solar is the part people get wrong. A single 200W panel in decent sun puts in roughly 140 to 160W after conversion losses, so refilling a 1kWh battery takes most of a day. Planning on a single panel to sustain a household through three cloudy days does not work.
The workable assumption is that each panel delivers about four hours of full output per day in good conditions. Multiply panel wattage by four, then compare that against what your loads consume per day. A household running a fridge, lights and a router at 200W continuous burns about 4.8kWh per day, which means you need roughly 1.2kW of panels to keep up.
Work backward from the station instead. The Anker C1000 Gen 2 accepts up to 600W of solar and refills from empty in 1.8 hours at that rate. The BLUETTI Elite 100 V2 takes up to 1000W and refills in about 7 hours. The DELTA Pro fills from four 400W panels in 2.8 hours, though its 15-amp input limit caps how large an array you can attach.
Overcast and winter conditions reduce output sharply, and multi-day storms can leave you dependent on wall charging or car charging. Treat solar as a slow top-up that extends your runway, not as a replacement for grid power during a long event.
Solar Generator Buying Guide: Nine Things to Check
Capacity comes first. Look at watt-hours, but apply the 76 percent usable figure above rather than the nameplate. Below about 500Wh you are covering phones and lamps. Between 1000 and 2000Wh you can run a refrigerator. Above 3000Wh you are approaching a household.
Rated output versus surge power is the second distinction most listings blur. Rated power is what the inverter sustains continuously; surge is a short burst for startup. A compressor motor can demand five to six times its running draw for a second or two, so match surge to the largest motor you intend to start.
Battery chemistry decides longevity. Every unit in this list uses LiFePO4, which handles thousands of cycles and tolerates heat far better than the older NMC chemistry. Cycle figures range from 4000 on several models up to 10000 on the Anker SOLIX S2000, and higher numbers mean a longer useful life.
UPS switchover speed matters more than most buyers expect. Anything under 20ms keeps computers, routers and medical equipment running without a reboot. The best units here manage under 10ms.
Standby draw is the sleeper issue. A unit that sips power while parked erodes your stored charge before you need it. Figures across this group run from 3W to 10W in UPS mode, and the difference over a week of storage is substantial.
Solar input ceilings vary more than capacity does. Anything at 105W or 200W will struggle to refill a large battery, while 600W to 1000W inputs fill meaningfully faster. Check the input limit before you buy panels.
Safety certifications are worth verifying. Look for UL 9540 or UL 2743 for the power station and UN38.3 for the battery cells, and confirm whether the included UPS function is actually certified rather than simply listed as a feature.
Indoor safety is where solar generators beat gas outright. There is no combustion, so there is no carbon monoxide, and LiFePO4 cells are far more thermally stable than NMC. You can run one in a closed room, which a gas generator cannot safely do.
Finally, compare against a gas generator honestly. Gas offers unlimited runtime as long as you have fuel, but it is loud, needs ventilation, requires maintenance and needs a fuel purchase you may not be able to make during an emergency. Battery units refill themselves and run silently, at the cost of finite storage. For most households the practical answer is one of each, or a battery unit plus a gas unit on hand.
Frequently Asked Questions
What is the best portable generator for a home power outage?
The Anker SOLIX C1000 Gen 2 is our top pick for most homes, with 1024Wh of LiFePO4 storage, 2000W of continuous output and a sub-10ms UPS switchover that keeps routers, laptops and CPAP machines running through a switch. For outages measured in days rather than hours, the BLUETTI Elite 200 V2 carries 2073.6Wh and a 2600W inverter, while the EF ECOFLOW DELTA Pro reaches 3600Wh and expands to 25kWh.
What size generator do I need during a power outage?
Add up the running watts of everything you want to power, then add 25 to 30 percent headroom for motor startup. In watt-hours, apply roughly 0.90 for depth of discharge and 0.85 for inverter losses, so a 1024Wh station gives about 780Wh usable. A refrigerator draws roughly 150W running, a router and laptop charger about 40W combined, and a CPAP machine around 40W.
How long can a solar generator run a refrigerator?
A 1024Wh unit typically runs a full-size refrigerator for roughly 9 to 24 hours depending on efficiency and how often the door opens. The Anker SOLIX S2000 is designed around this use case, with a published 35-hour fridge runtime at 6W idle draw and owner reports landing between 33 and 35 hours with a 220L fridge. Larger units such as the BLUETTI Elite 200 V2 extend that to a full day or more.
What are the downsides of solar generators?
The main drawbacks are finite storage, weight and recharge speed. A unit that is fully charged has a fixed runtime, larger batteries weigh 50 to 100 pounds, and solar recharging is slow enough that a single 200W panel takes most of a day to refill 1kWh. Standby drain also matters, since a parked unit slowly loses charge over days in storage.
Are solar generators safe to use indoors?
Yes. Solar generators have no combustion, so they produce no carbon monoxide and can be run in a closed room, garage or bedroom. LiFePO4 chemistry, used in every unit reviewed here, is also more thermally stable than the older NMC lithium chemistry. Gas generators cannot be run indoors without serious carbon monoxide risk.
Do solar generators lose charge when not in use?
Yes, though far more slowly than most people expect when a unit is switched off properly. Standby draw while parked is the bigger factor, ranging from about 3W on the Anker SOLIX S2000 to 10W on the BLUETTI Elite 200 V2. Owners also report units losing 20 percent or more overnight with the screen left on, so switch the display off and top the battery up before storm season.
The Bottom Line on Solar Generators for Power Outages
The best solar generators for power outages come down to how long your outage lasts. For a typical night or a single bad storm, the Anker SOLIX C1000 Gen 2 is the pick: 1024Wh, 2000W of output, the fastest recharge in this group and a sub-10ms switchover that keeps sensitive electronics alive. It also has more owner reviews than any other unit in this group.
If you are planning for multi-day events, step up to the BLUETTI Elite 200 V2 at 2073.6Wh and 2600W, or the EF ECOFLOW DELTA Pro if you need 3600Wh and true whole-home headroom. Both handle refrigerator plus freezer plus lights at once; only the DELTA Pro expands far enough to replace a generator entirely.
Before you buy, write down your loads, add 25 percent headroom, then apply the 76 percent usable capacity figure. That five-minute exercise will save you from the most common disappointment we see, which is choosing a sub-500Wh unit for a refrigerator. Top the battery off, run the outlets once before you need them, and keep the station indoors where it is dry.