₦airaland Forum

Most people say “solar does not work at night” and they mean the panels. That part is true. Solar panels need light, so after sunset they stop producing electricity. The real question is whether your solar setup can keep your home running after dark. That depends on the rest of the system, not the panels alone.

Batteries store the energy that panels produce during the day. A well sized battery bank can supply your lights, fridge and phones all night. The chemistry of the battery matters. Lead acid batteries are cheap but you should avoid drawing them down completely. If you keep draining them deeply they will fail in a few years. Lithium batteries cost more up front but let you use a bigger share of their capacity and they last longer under normal use. For example, a household that needs 10 kilowatt-hours overnight will usually need about 14 kilowatt-hours of lithium nameplate capacity after you allow for depth of discharge and charging losses. With lead acid the same night need may require double the nameplate capacity.

The inverter also matters. Battery kilowatt-hours tell you how long you can run. Inverter kilowatts tell you what you can run at the same time. A battery may have enough stored energy but a small inverter will not start a fridge compressor or a water pump. Choose batteries and inverter that match the appliances you want to run together.

There are real trade offs. If you only need lights and phone charging, a small battery bank is cost effective and will stop you using the generator every night. If you want to run air conditioning and heavy loads all night, then you must expect larger panels, bigger batteries and a stronger inverter. That means higher upfront cost but fewer generator runs and lower fuel spend over time. The right choice comes from measuring your real use and matching the system to that profile.

Practical points you should know. Charging and discharging are not perfectly efficient. Expect round-trip losses, so panels must produce extra energy during the day to refill batteries for night use. Installers usually add a safety margin to cover cloudy days and system losses. Fit the charge controller and wiring correctly, and allow for temperature effects on battery life. Do not let a salesperson sell you a vague kW number without showing the math for your night load.

If you want to discuss whether battery-backed solar makes sense for your home, or to see the exact panel, battery and inverter sizes you will need to run through the night?

What do you think? Is full night coverage worth the cost in your area, or is a small battery enough for you?

Try facing the panel to the direction of the moon at night.
Though the headline made me refuse to read what you typed.
Sorry bout that

Mcreloaded:
Try facing the panel to the direction of the moon at night.
Though the headline made me refuse to read what you typed.
Sorry bout that

I understand you brother.

Apology accepted.

Primistine Electric