How To Design an Off-Grid Solar Power System

The first step in designing a system is usually the most difficult. You need to accurately determine the loads in watt-hours. That means you need to know the power (watts) each piece of equipment uses and how many hours a day it will be turned on. (watts x hours = watt-hours) Batteries and solar panels will be sized based on the watt-hours per day you need, and the inverter is sized based on the peak watts needed by your equipment.

Click here for help calculating the watts and watt-hours of your lights and equipment. Click the image to estimate the Watt-hours your loads will need.

Click on the photos below for design help for each of the system components.