To become truly energy independent with a new solar PV system, you need to assess the amount of energy it will have to produce. Depending on your circumstances, the best approach will be one of the following. Checking past utility bills
is the most rational and time efficient. They will tell you the average energy consumption per month, which you just need to divide by 30 days.
You can expect some seasonal change in the numbers, especially if the climate in your area differs throughout the year. Some shifts in consumption patterns are also inevitable. We recommend using the highest monthly bill as a baseline, because it can give you additional safety margin. Checking the power ratings
is for those who value precision. Make a list of all the devices you use daily, find out their power ratings and multiply by the time you normally use them a day. Sum everything up to get your average energy consumption. Sounds doable for an RV solar installation
or a marine power system
: the power consumption there is more or less predictable. When it comes to a house, the task becomes herculean.
In any case, don't forget to account for a 20-30% energy loss. It's inevitable due to multiple reasons: shading, high temperatures, reflection, dust and more.