Carefully
filling out the following tables will result in a reasonable estimate of your
electrical needs. Be conservative but remember that many appliances have worst
case inflated wattage use listed on their labels. Remember also that you
should be using efficient AC or DC lighting (not incandescent bulbs). The
amount of time each appliance is used should be carefully thought out as well.
A submersible pump or vacuum cleaner uses a large number of watts but usually
only for a short time. Conversely a circulator pump may take only a few watts
to run, but can run for large amounts of time in the winter when you can least
afford it. Consult The Solar Electric Independent Home Book for
more details on load calculations.
DC Appliance Hours/Day x Watts/Appliance = WattHours/Day/Appliance
DC Average Daily Loads:
AC Appliance
Hours/Day x Watts/Appliance = WattHours/Day/Appliance
Subtotal AC Average Daily Loads: Add 10% of Subtotal for Inverter Inefficiency: Total AC Average Daily Loads: Total Average DC Loads (from above): TOTAL AC and DC Average Daily Loads:
