(controller by charge controller)
|Current Through Resistor
|Power Dissipated by Resistor
To protect your expensive wind generator, battery bank and alternative energy system from potential destruction, choose a dump load that exceeds the maximum output of your complete system by at least 20%. For example, suppose you have a max. power 600 Watt wind turbine and a max. power 400 Watt solar panel (600 Watts + 400 Watts = 1000 Watts total) hooked up to your battery bank. In this case you will need a 1200 Watt dump load to safely operate your system (20% more than 1000 Watts = 1200 Watts). These 300 Watt resistors can be wired in parallel to dump 300, 600, 900, 1200 Watts, etc. For the previous example, you would need four of these 300 Watt resistors wired in parallel to dump 1200 Watts.
Resistors Wired in Parallel
Consult the following chart for how many Watts can be dumped as a function of the number of 300 Watt resistors wired in parallel (See the image below for a diagram showing how to wire resistors in parallel).
|# of Resistors||Total Power Dissipated (Watts)|
Note: The following simple formula can be used to determine dumping Watts as a function of the number of 300 Watt resistors wired in parallel:
Total dumping Watts = (300 Watts) x (# of resistors wired in parallel)