Outage Guide · Updated October 19, 2026

Do Solar Panels Work in a Power Outage?

Q: Do I need a backup generator if I have solar panels?

If your system has no backup-capable battery, yes, because solar alone will not keep the power on in an outage. A battery power station is the quiet, indoor-safe option; a gas generator is cheaper per kilowatt-hour but must run outdoors.

Usually not — most home solar systems switch off the moment the grid goes down, even on a sunny day. That is deliberate: grid-tied inverters are required to disconnect so they cannot push power into lines that utility crews are working on. Your panels keep producing; the inverter simply refuses to deliver it. The systems that keep working in a blackout have a battery set up for backup, or are fully off-grid. Below: why the shutdown happens, how to tell what your system does, and the four realistic ways to keep the lights on.

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By Morgan Chen Reviewed & approved by Juhi Sahni | Updated: October 19, 2026

Why Your Solar Shuts Off When the Power Goes Out

The rule is called anti-islanding. When the grid fails, a home that kept generating would form an energised “island” on a line everyone else expects to be dead — a hazard to the lineworkers repairing it. So the interconnection standards that grid-tied inverters are certified to, IEEE 1547 and UL 1741, require the inverter to detect the loss of the grid and stop exporting within two seconds. NREL testing of commercial residential inverters found real-world shutdowns well inside that limit.

Panels

Still generate in daylight. Nothing is wrong with them.

Inverter

Sees the grid is gone and stops delivering power. This is the part that shuts you down.

Your home

Goes dark along with the neighbours — unless something can form a safe, isolated island.

Sources: NREL, anti-islanding test procedure validation; Solar Builder, “IEEE 1547-2018 and UL 1741 explained”.

Which Solar Systems Keep Working in a Blackout?

System type	Works in an outage?	Why
Grid-tied, no battery	No	Anti-islanding shuts the inverter off with the grid. The most common residential setup.
Grid-tied with a battery, not configured for backup	Often no	Some batteries are installed only to store solar for evening use or bill savings and cannot island the home.
Grid-tied with a backup-capable battery	Yes, for backed-up circuits	A transfer device isolates the home from the grid, then the battery (and panels, in daylight) power a backup panel.
Inverter with a daytime emergency outlet	Partly	A few inverter models offer a sunlight-only outlet for small loads. Check your inverter's manual for the feature.
Off-grid system	Yes	Never connected to the grid, so there is nothing to disconnect from.

How to find out what you have: your installation paperwork or monitoring app will name the inverter and say whether a battery or backup gateway is installed. If you have no battery, assume the system goes dark in an outage. Your installer can confirm in one phone call.

Four Ways to Keep Power in an Outage When You Already Have Solar

1. Add a backup-capable home battery

The most seamless option: an installer adds a battery and transfer equipment that islands the home automatically, and your rooftop panels recharge it in daylight. It is also the most expensive and needs a permit and installation. Ask your original installer what your inverter supports.

2. A portable power station plus portable panels

Completely independent of your rooftop system, so the inverter's shutdown is irrelevant. Charge it from the wall before a storm, run the fridge, freezer, internet and lights off it, and top it up from portable panels in the yard. No installer needed — and it goes camping the rest of the year. This is where most households start.

3. A large power station on an inlet and transfer switch

The middle ground. An electrician installs an inlet and a manual transfer switch, and a 3 kWh+ station feeds your essential circuits — furnace blower, well pump, kitchen — instead of running extension cords. Never backfeed a dryer outlet. Our transfer switch guide covers the options.

4. A gas generator

Cheapest per kilowatt-hour and unlimited runtime while fuel lasts, but noisy, must run outdoors because of carbon monoxide, and needs fuel stored and maintained. See solar vs gas generators for the full trade-off.

Can I Charge a Power Station From My Rooftop Panels?

Not practically, and not as a DIY job. Rooftop panels are wired in strings that typically run at voltages far above the solar input window of a portable power station, and the wiring is part of a permitted, inspected system. Splitting off a string is an electrician's decision, not an outage-night improvisation.

The simpler answer is a separate set of portable panels for the station. How many you need depends on the station's solar ceiling — our solar panel setup guide and portable panel guide cover the pairing.

What to Power First in an Outage

Battery capacity goes furthest on the loads that protect health, food and communication. A sensible order:

1.Medical devices — a CPAP or oxygen concentrator. See running a CPAP.
2.Refrigerator and freezer — cyclic loads, cheap to keep running. See freezer backup.
3.Heat in winter — a gas furnace's blower, not resistive heaters. See running a furnace.
4.Internet, phones and lights — tiny draw, big quality-of-life return.
5.Water — a well pump or sump pump if you have one. See well pumps and sump pumps.

Add up those loads in our solar size calculator to see what capacity you need.

Power Stations That Keep a Solar Home Running in an Outage

These do not connect to your rooftop system — that is the point. They charge from the wall before an outage and from portable panels during one, so they work no matter what your inverter does. Specs from our product database; prices are live.

Best first step for a solar home

Jackery Explorer 2000 Plus

91/100

2,042 Wh 3,000W output 6,000W surge 1,400W solar in 61.5 lb

2,042 Wh with 3,000W output and an expansion path to about 24 kWh. Plugs straight into your fridge, freezer and internet during an outage with no installer, and grows into circuit-level backup later. Pair it with portable panels and you have outage solar that does not depend on your rooftop inverter at all.

See today’s price on Amazon

Check Price on Amazon →

At our lowest logged price — $899.00 · our log since Sep 21

Best for transfer-switch backup

Anker SOLIX F3000

93/100

3,072 Wh 3,600W output 4,860W surge 2,400W solar in 91.5 lb

3,072 Wh expandable to 24 kWh, 3,600W output and 240V split-phase capability. This is the tier where an electrician-installed inlet and transfer switch can put your essential circuits on battery — the closest a portable unit gets to a home battery.

$1,398.98Current price on Amazon

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At our lowest logged price — $1,398.98 · our log since Sep 18

Most capacity per unit

EcoFlow Delta Pro 3

95/100

4,096 Wh 4,000W output 8,000W surge 2,600W solar in 113.5 lb

4,096 Wh with 4,000W output and 2,600W of solar input. If your outages run multiple days, the big solar ceiling matters: a ground-mounted portable array can put a meaningful share of a day’s use back in.

$2,799.00Current price on Amazon

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Lowest we’ve logged: $2,784.00 (Sep 24) · our log since Sep 18

Best value

Bluetti Elite 200 V2

91/100

2,074 Wh 2,600W output 3,900W surge 1,200W solar in 48.5 lb

2,074 Wh with 2,600W output and 1,200W of solar input — the strongest capacity-per-dollar in the 2 kWh tier, and enough for the core outage loads in most homes.

$1,399.00Current price on Amazon

Check Price on Amazon →

Lowest we’ve logged: $899.00 (Oct 8) · our log since Oct 8

Prices shown are the current Amazon price. Badges come from our own daily price log — see the solar generator price tracker; they describe what we observed on the listing, not a manufacturer claim or a prediction.

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Solar in a Power Outage FAQ

Do solar panels work during a power outage?

Usually not. Most home systems are grid-tied, and their inverters must shut down when the grid fails so they cannot energise lines that utility crews are repairing. The panels still produce power, but the inverter will not deliver it unless the system has a battery configured for backup or is fully off-grid.

Why does my solar shut off when the power goes out?

Because of anti-islanding protection. Grid-tied inverters are certified to standards (IEEE 1547 and UL 1741) that require them to detect a grid outage and stop exporting within two seconds. It is a safety feature, not a fault.

Does a solar battery work in a power outage?

Only if it was installed for backup. A backup-capable battery uses transfer equipment to isolate the home from the grid and then powers a backup panel. Some batteries are installed purely for storing solar or saving on bills and cannot island the home — your installer can confirm which you have.

What is the cheapest way to have power in an outage if I have solar?

A portable power station, charged from the wall before a storm and from portable panels during it. It works independently of your rooftop system, needs no installer, and a 2 kWh unit covers a fridge, freezer, internet and lights for most households.

Can I charge a portable power station from my rooftop solar panels?

Not practically. Rooftop strings typically run at voltages far above a portable station's solar input range, and they are part of a permitted system. Use a separate set of portable panels instead, and leave any rewiring to an electrician.

Do I need a backup generator if I have solar panels?

If your system has no backup-capable battery, yes — solar alone will not keep the power on in an outage. A battery power station is the quiet, indoor-safe option; a gas generator is cheaper per kilowatt-hour but must run outdoors.