Currently a getaway retreat in a beautiful area of Utah, in a few years this cabin will be the full-time retirement residence of the couple that owns it. Currently, they pay $35/month simply to be connected to the electric grid. When they move to the cabin full-time they want it to be fully self-sustaining and off the grid. To achieve this, we designed their system to be a combination of a ground-mount solar array, batteries to power all their loads, and a back-up generator.
When preparing our load analysis, we factored specifically for the batteries to fully power the house. We accounted for all the appliances, the number of lights, even how much power their well pump required. Now the cabin has enough storage to run for four days on battery power alone. And, if the bad weather goes beyond that, the back-up generator will power the house, and recharge all the batteries within a single day.