Off-Grid Load Estimation
The first step in the process of purchasing an off-grid system, whether installed by a professional or by a do-it-yourselfer, is to list all of the loads you desire to run. Attached is a load estimation sheet to help guide us in making efficiency improvements and in building a system to meet your needs.
Start by listing loads. Examples are television, lighting (AC), lighting (DC), water pump, refrigeration, stereo, coffee pot, etc. Next, determine if they are AC, as in a standard home, or DC. Then, find out how many watts an appliance uses. Sometimes an item’s power requirement is printed on the unit. We’re available to help with the figuring—often, the list of examples that we have is adequate for estimating energy requirements. Note how many of these loads you have; for example, 1 refrigerator and 5 lights. Lastly, estimate how many hours the load is used per day (consider winter vs. summer here) and the number of days per week used. We can help you determine your energy needs so that your home is adequately powered by a solar system.