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How Much Power Do I Need?

How to Calculate Energy
Here are three formulas to help you understand energy:

· watts=amps x volts

· volts=watts/amps

· amps=watts/volts

In electricity watts are watts, regardless of if they are AC or DC. On the other hand Amps and Volts must be converted when changing currents from DC to AC and vice versa.

1000w AC is the same as 1000W DC

To convert AC amps to DC amps multiply by ten. 10 Amps AC is 100 Amps DC.

To convert DC amps to AC amps divide by ten. 100 Amps DC is 10 Amps AC.

Some examples:
  • Hair dryers can use 1000w 110v AC. Convert the watts to AC amps.(watts/volts=amps) We get 9 AC amps. We can then convert those to DC amps by multiplying by 10. We get 90 DC amps.
  • A 27″ LCD TV uses 85w 110v AC. Convert watts to AC amps.(watts/volts=amps) We get .78 AC amps. Multiply by 10 to get DC amps and we have 7.8 DC amps.
  • iPhone 6 uses 12w 110v AC to charge. Convert watts to AC amps.(watts/volts=amps) We get .109 AC amps. Multiple by 10 equals 1.09 DC amps.

Using labels on appliances is the easiest way to determine how much energy they use when in operation.
1. Fill in quantity of items and # of hours each runs/day.

1. Total Weekly Amps Calculation
Multiply total amp hours per day by the number of days per week (i.e.: weekend camping: multiply total amp hours x 2 days, full-time camping: multiply total amps per day x 7 days).

______ amps per day X ________ # of
days per week =______ total amps weekly

2. Solar Output Chart
Match your local amp hours per week to the chart below.

4. Solar Kit Guide & Sizing
Our AC + DC power systems give you the freedom to use your AC and DC appliances anywhere. The system integrates into the electrical panel of your unit and operation is as simple as the touch of a button. The kits come
complete with everything you need to power your systems, including solar panels, inverter, charge controller, and mounting hardware.

Our Solar Kits are designed to keep your batteries charged. These large solar kits convert the sun's energy into DC electricity which charges your vehicle's battery and gives you the freedom to run lights, furnaces, fans and other DC appliances without the worry of running out of power. Our Solar Kits are virtually maintenance free and designed to give you decades of uninterrupted power.
The Solar Elite is a mid-sized system for either full-time or
short-term RVing .
The Weekender System is a complete RV power package for
weekend warriors.