Best Solar Generator for Home Backup in 2026: What It Actually Covers

Home backup is the use case where the marketing and the arithmetic diverge most. A solar generator — the same hardware as a portable power station, sold with panels — is genuinely excellent at keeping a fridge cold, phones charged and a CPAP running through an outage. It is not a whole-house generator, and the gap between those two things is where people lose money.

So let’s put the numbers down first.

What does a day of essentials actually cost?#

Not a survivalist list. The things a household actually wants during an outage:

Load	Draw	Hours	Wh/day
Refrigerator	48 W average (duty-cycled)	24	1,152
Wi-Fi router + modem	15 W	24	360
LED lighting (6 fixtures)	8 W each	5	240
Laptop	60 W	4	240
CPAP (AC, humidifier off)	20 W	8	160
Two phones	10 W each	2	40
		Total	2,192 Wh/day

Apply inverter losses and the battery you need for one day is:

2,192 ÷ 0.85 = 2,579 Wh

Now the uncomfortable part. Scaled up:

Outage length	Battery needed
1 day	2,600 Wh
2 days	5,200 Wh
3 days	7,700 Wh

No portable unit in this guide stores three days of essentials. The largest, the EcoFlow DELTA Pro, holds 3,600 Wh — about 1.4 days. That isn’t a criticism of the product; it’s the physics of the category. Multi-day coverage comes from expansion batteries or solar input, never from buying one bigger box.

What it will not run#

Be clear about this before you spend anything.

Appliance	Running draw	Verdict
Central air conditioning	3,000–5,000 W	No — exceeds most inverters, and would drain 3.6 kWh in under an hour
Electric water heater	4,500 W	No
Electric furnace / baseboard heat	5,000–10,000 W	No
Electric range / oven	2,000–5,000 W	No
Clothes dryer	3,000 W	No
Gas furnace blower only	300–800 W	Yes, but budget 1,200–3,200 Wh/day
Well pump	1,000 W running, 3,000 W+ surge	Only on a 3,000 W-class inverter
Sump pump	800 W running, 2,000 W+ surge	Usually yes, check surge
Microwave	1,000–1,500 W	Yes, in short bursts

The furnace blower is the one worth thinking hardest about. If you heat with gas, the burner needs no electricity but the blower does — and adding it can double or triple your daily figure in winter, exactly when outages last longest. Measure yours rather than guessing; blower draw varies enormously between a modern ECM motor and an older PSC one.

Why expandability is the spec that matters#

For camping, weight decides. For home backup, expandability decides, because it’s the one thing you cannot add later.

Model	Base	Expands to	$/Wh
EcoFlow DELTA Pro	3,600 Wh	25,000 Wh	$0.78
Jackery Explorer 2000 Plus	2,042 Wh	12,000 Wh	$1.08
BLUETTI AC200L	2,048 Wh	8,192 Wh	$0.83
EcoFlow DELTA 2 Max	2,048 Wh	6,144 Wh	$0.93
EcoFlow DELTA 3	1,024 Wh	5,000 Wh	$0.68
Anker SOLIX C1000	1,056 Wh	not expandable	$0.95
BLUETTI AC180	1,152 Wh	not expandable	$0.87

Buying a non-expandable unit for backup duty means that when you discover one day isn’t enough — and the first real outage teaches you that — your only option is to buy a second complete system.

The picks#

Best overall — EcoFlow DELTA Pro#

3,600 Wh, 3,600 W continuous, 7,200 W surge, expands to 25 kWh, 1,600 W solar input, $2,799 ($0.78/Wh).

It covers about a day and a half of essentials alone, and it’s the only unit here that scales to genuinely multi-day coverage. The 3,600 W inverter starts a well pump or a sump pump, and the 30A outlet feeds a transfer switch or an RV inlet directly. 1,600 W of solar means a modest roof or ground array can actually keep pace with an essentials load.

99 lbs, so it lives where you put it. For a backup unit that’s the correct trade.

Best value — BLUETTI AC200L#

2,048 Wh, 2,400 W continuous, expands to 8,192 Wh, $1,699 ($0.83/Wh).

Roughly 19 hours of essentials on the base unit, scaling to three days fully expanded, at the best price per watt-hour in the 2 kWh class. 1,200 W of solar input is ample.

The 2,400 W inverter is the limit — enough for a sump pump, marginal for a well pump with a hard start.

Best mid-size — EcoFlow DELTA 2 Max#

2,048 Wh, 2,400 W continuous, 50 lbs, 78-minute recharge, $1,899 ($0.93/Wh).

The one you can still carry, and the fastest to refill — which matters more than it sounds during an outage with intermittent power, or if you can drive to a friend’s house with power for an hour.

Best entry point — EcoFlow DELTA 3#

1,024 Wh, expands to 5,000 Wh, $699 ($0.68/Wh).

If you’re not sure backup is worth the spend, this is the honest starting point. It runs a fridge for 18 hours on its own, costs a third of the DELTA Pro, and grows to 5 kWh — just under two days of essentials — when you decide it’s worth it. Best price per watt-hour in our database.

How do you actually connect it?#

Two approaches, and most households should start with the first.

Extension cords. Run a heavy-gauge cord from the unit to the fridge, another to a power strip for lights and devices. No electrical work, no permit, works the day it arrives. The downsides are cords across floors and no power at wall outlets.

A transfer switch or interlock. An electrician installs a switch that lets you feed selected circuits from the power station instead of the grid, so wall outlets and hardwired appliances work normally. This is what you want for a furnace blower or a well pump, and it needs the 30A outlet — which among these units means the DELTA Pro.

Never back-feed through a dryer outlet or a “suicide cord.” It’s illegal, it can kill a lineworker, and it will burn your house down before it does anything useful. If you want circuit-level backup, pay an electrician.

When solar stops being optional#

For camping, panels extend a trip. For backup, they’re the difference between covering an outage and watching the battery empty.

A 400–800 W array realistically returns 1,200–2,400 Wh on a clear day — treat 60–70% of rated wattage as the planning figure, not the sticker number. That’s roughly half to all of an essentials load, which turns a 1.4-day battery into something that survives a multi-day event.

The catch is that major outages arrive with weather. A hurricane or an ice storm brings days of cloud, and panels do close to nothing under heavy overcast. Size the battery so a run of grey days is survivable and treat the solar as recovery between fronts.

Solar generator or gas generator?#

The honest comparison, because both have a real case.

A solar generator wins on noise (silent versus 60–70 dB), on safety (no carbon monoxide, so it runs indoors), on maintenance (no fuel to stabilise, no carburettor to gum up between uses), and on being instantly ready. It also works for a two-hour outage, where dragging out a generator isn’t worth it.

A gas generator wins on sustained output and on unlimited runtime given fuel. If you need air conditioning, have a deep well, or live somewhere outages run a week, that’s decisive.

If you can only have one and your outages are short, buy the battery. If your outages are long and your climate is punishing, buy the generator and add a small battery for the quiet hours.

One thing to do before the next outage#

Charge it, then actually run your fridge off it for an afternoon.

Two things come out of that. You learn your real daily figure rather than our table’s estimate, and you find out whether your fridge trips the inverter on start-up — which is far better discovered on a Sunday than at hour three of a storm outage. Compressor surge is the one failure mode that spec sheets don’t reliably predict.

Then leave it charged. LiFePO4 holds charge for months, but a backup unit at 40% when the lights go out is a backup unit that isn’t much use.

Related#

• What size power station do I need? — the method behind the 2,192 Wh figure
• How long will it run a fridge? — your largest steady load, derived in full
• Best power stations for CPAP — if a medical device is the reason you’re buying
• Best portable power stations of 2026 — picks across every class

All prices are MSRP. This category discounts 30–40% on major sale events, and home-backup-class units discount hardest.