Specifications

Diversion Load Types:
A diversion load needs to be larger (by at least 20%), than the sum total of all your solar/wind/hydro charge
sources combined. When the diversion load is too small, battery voltage may continue to rise, even when the
dump is active. It is also important to use a load that is not likely to fail. Light bulbs and similar such loads are
not good diversion (dummy) loads, since they will fail and you may be left with no method to dump the excess
energy from your batteries. A common dummy load is a standard 120vac, 2000 watt heating element readily
available from your local hardware store. Please note, a 2000 watt element will not dissipate 2000 watts at
lower voltages, therefore you may need to install multiple elements in parallel to achieve the desired load
specifications.
Please use the following chart as a quick guide in using 120 VAC heating elements.
60Vdc dump (48Vdc system) -- 500 Watts -- 8.3 amps
30Vdc dump (24Vdc system) -- 125 Watts -- 4.2 amps
15Vdc dump (12Vdc system) -- 35 Watts – 1.0 amps
120Vac -- 2000 Watts, at 16.7 amps
Another acceptable diversion load are power resistors. These can be obtained on our website at:
http://www.ColemanAir.us
Use the following chart values of power resistors to obtain a 500-watt diversion load.
60Vdc dump (48Vdc system) -- (1) 500 watt, 8 ohm resistor (450 watts)
30Vdc dump (24Vdc system) -- (1) 500 watt, 2 ohm resistor (450 watts)
15Vdc dump (12Vdc system) -- (1) 500 watt, .5 (1/2) ohm resistor (450 watts)
The 500 wattage rated resistors in the chart above are an example only, it is perfectly acceptable to use
higher wattage power resistors if they can be obtained economically.
Place multiple resistors in parallel for a higher wattage load. When you place same value resistors in parallel,
you double the wattage rating, and ½ the resistance. This is a safe method of doubling the wattage/amperage
handling capability of your diversion load.
Note, you cannot simply use a lower value resistance without also increasing the wattage rating of your
resistor. For instance, attempting to use a single 500 watt power resistor of 2 ohms on a 48 volt battery system
(60v dump), will result in the dissipation of 1800 watts, however the resistor is only rated at 500 watts, and will
be destroyed.