HUP Batteries Q & A

Here's the formula: (Daily Power Consumption kWh) X (Days of Autonomy) X (1.2 80%DOD) x (1.2 System Losses) = Battery capacity in Kwh. Many of today's Renewable Energy homes use between 5 and 10 kWh each day. This may not sound like much when compared to your current power bill, but with the right planning, appliance selection, proper equipment, and a mind-set geared towards conservation, 5-10 kWh can be a lot of energy. Another factor will be your location. If you live in northern climates where sunshine is scarce in the winter, we would like to see about 3 days of battery reserve. In sunny climates 2 days can be used. If your site has enough hydro power then even 1 day of reserve battery power can work. Wind power can also be considered, but depending on where you live it can be unpredictable as to when it will provide you any energy. In our opinion, a maximum of 5 days reserve can be build into the system, but we prefer 2-3 days.