How Much Power Do I Need?
Appliances run on amps. Amps, the amp-hour (abbreviated as “Ah“), refers to the number of amps an appliance uses when it is run for an hour.
These amp-hours will be drawn from the batteries, and the batteries, in turn, will look to the solar panels to recharge the amp-hours they have used to power the appliance.
It is for this reason that you need to know how many amp-hours you will use in a typical day. Ultimately those amp-hours must be replaced by the solar panels, so the size and number of panels you purchase will be determined by how many amp-hours you use in a day.
To estimate how many amp-hours you might use in a day, estimate how many hours each appliance will run and multiply that by the number of amps the appliance uses.