Do Solar Panels Work at Night?
Straight answer: no. Solar panels need sunlight, so after dark they produce essentially no usable power — moonlight is far too weak to run the system. Your lights still work at night because of one of two things: a battery that stored the day’s solar, or electricity imported from the grid. Your tariff just decides how the daytime exports and nighttime imports are credited. Here’s exactly how it works.
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- Solar panels make essentially no usable power at night — they need sunlight; moonlight won’t run the inverter.
- Your home stays powered after dark on a battery or on grid electricity.
- Net metering / Net Billing is a billing method, not a power source — it only sets how exports and imports are credited.
- Under NEM 3.0 (SCE, PG&E, SDG&E), a battery is worth more than it used to be — storing your own solar for the night beats exporting it cheap at noon.
Why panels stop at night
A solar panel makes electricity when photons from sunlight knock electrons loose in its cells. No sunlight, no meaningful current. Moonlight is just sunlight reflected off the moon — a tiny fraction of the intensity, not enough to push the inverter past its start-up threshold and make usable AC power for your home. So from dusk to dawn a panel effectively produces nothing. It ramps up at sunrise, peaks at midday, and fades at sunset.
So how do I have power at night?
Two ways, and many homes use both:
A battery
During the day your panels often make more than you use. A home battery stores that surplus and then powers your home after sunset. This is the only way to run on your own solar at night.
The grid
A grid-tied home without a battery simply imports electricity from the utility at night. Your daytime exports earn credits toward those imports — how much depends on your tariff, not on the panels.
Day vs night: where your power comes from
Flip between day and night to see what your panels are doing and what actually keeps your lights on after dark.
Your home, day and night
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Simplified illustration. How daytime exports and nighttime imports are credited depends on your utility and tariff, not on the panels themselves.
Net metering is not a power source
This trips people up. Net metering and the Net Billing Tariff (NEM 3.0) are billing methods — they set the rules for how your daytime exports and nighttime imports are credited. They don’t send power to your house at night. The electrons you use after dark come from a battery or the grid; the tariff just does the accounting. So “my panels power me at night through net metering” isn’t quite right — the grid powers you, and the tariff credits it.
Under NEM 3.0, store it — don’t export it
On SCE, PG&E and SDG&E, the Net Billing Tariff pays a low, time-varying credit for the solar you export at midday, while power you import at night costs the full retail rate. That gap is a major reason a battery can improve solar economics under the Net Billing Tariff: instead of exporting cheap noon power and buying expensive night power, you store your own and use it after dark. LADWP is municipal and runs its own solar schedule — the math differs. See do you need a battery under NEM 3.0.
What about a grid-tied system with no battery?
It works fine — at night it just buys from the utility like any home. The one catch: in a blackout, a grid-tied system without a battery shuts off for safety (it can’t back-feed a line crews may be working on), so it won’t power you during an outage either, day or night. That’s a battery’s other job — see do solar panels work in a power outage.
What this means for an LA homeowner
Solar alone doesn’t make you night-proof
Panels cut your daytime grid use, but your evenings and nights still lean on the grid unless you add storage.
Size solar to your usage, battery to your nights
How many panels covers your total use is one question; how big a battery covers your evening and overnight loads is a separate one. See how many panels you need.
Know your utility’s tariff
Whether a battery pays off hinges on your export credit. That’s NEM 3.0 for California’s investor-owned utilities (SCE, PG&E and SDG&E) and a different schedule for LADWP.
Sources & methodology
Primary and authoritative sources for this page: DOE — Homeowner's Guide to Going Solar · DOE — How does solar work? · NREL — Solar photovoltaic research basics · CPUC — Net Energy Metering and Net Billing. Figures and program statuses are current as of publication — verify time-sensitive items (rates, tariffs, incentive budgets) on the official source before relying on them.
Frequently asked
Do solar panels work at night?
No. Solar panels need sunlight to generate electricity, so after dark they produce essentially no usable power. Moonlight is far too weak to run the system. Your home stays powered at night from a battery that stored the day’s solar or from electricity imported from the grid.
Can solar panels charge from moonlight?
Not usefully. Moonlight is reflected sunlight at a tiny fraction of the intensity — not enough to push the inverter past its start-up threshold and make usable AC power. In practice a panel makes effectively nothing from dusk to dawn.
How does my house have electricity at night with solar?
Two ways. A home battery stores your daytime surplus and powers the house after sunset. Or, in a grid-tied home, you simply import power from the utility at night. Daytime exports receive a separate credit under your utility’s tariff, and nighttime imports are billed at the applicable retail rate. Net metering and the Net Billing Tariff are the billing rules for that — not a power source themselves.
Do I need a battery to use solar?
No — a grid-tied system without a battery still offsets your daytime usage and uses the grid at night. A battery becomes worth it when you want to run on your own solar after dark, keep power during an outage, or capture more value under NEM 3.0, where exported midday power earns little. See do you need a battery under NEM 3.0.
When do solar panels produce the most power?
Around solar noon, when the sun is highest. Output ramps up after sunrise, peaks at midday, and fades toward sunset — the opposite of when most families are home using power in the evening and at night. That mismatch is the main reason batteries and time-of-use planning matter in California.
Related reading
Power your evenings, not just your middays
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Get a free estimatePrepared by Cali Energy, July 2026. This article is for general educational purposes only and is not legal, tax, financial, engineering, or utility advice. Rates, incentives, codes, permit requirements, equipment specifications, prices, and program terms may change; figures and timelines are estimates, not guarantees. Confirm current requirements with the applicable utility, AHJ, program administrator, manufacturer, or a licensed professional. See our Content Disclaimer. Cali Energy · 19201 Parthenia St Unit E, Northridge, CA 91324 · CSLB #1032379 (B, C-10, C-39)