12V 24V 48V (0.75OHM) 300W DUMP LOAD WIND TURBINE GENERATOR Diversion Charge Controller Resistor
$39.00
(1 review)
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12V 24V 48V (0.75OHM) 300W DUMP LOAD WIND TURBINE GENERATOR Diversion Charge Controller Resistor
Prevent your wind turbine from freewheeling damage by using these 0.75 ohm brake resistors to slow down the turbine when your battery is fully charged.
The other resistors on the market run dangerously hot and are complicated to install. Our resistors are designed specifically to run cooler and to be easier to install.
Our premium aluminum housed resistors are FAR SUPERIOR to the traditional round cylindrical red, pink, green, etc resistors on the market. Here's why:
- In an open air environment, with no fans*:
- Our resistors run at 130-140°C (266-284°F).
- Traditional ceramic round resistors: 200-240°C (392-464°F)
- Pre-wired for quick installation. Supplied with .162" metal ring terminals that will fit a #8-32 screw.
- High temperature wire fiberglass insulated oven wire rated for 500°C saves time for a quick install. Wire length: 13"
- Aluminum extruded housing with heat sink fins for maximum heat dissipation.
Dump load resistors can be dangerous and cause fires if not installed or maintained properly. Always mount them on a metal or concrete (non-flammable) surface, never on a wood or drywall surface. Interesting fact: The minimum temperature needed to ignite wood is 180°C or 356°F.
We recommend multiplying your wind turbine's capacity by 2 in order to get the dump load resistor capacity. For example: If you have a 450W wind turbine, 450 x 2 = 900W of required resistor capacity (or, 3 resistors).
Sizing chart:
| Charge controller dump voltage (VDC) | Power dissipation (W) |
| 12.0 | 192.0 |
| 12.5 | 208.3 |
| 13.0 | 225.3 |
| 13.5 | 243.0 |
| 14.0 | 261.3 |
| 14.5 | 280.3 |
| 15.0 | 300.0 |
*Testing on both resistor types was done at 25°C (77°F) ambient. In both cases battery voltage was 12.1V. This test was performed in a controlled environment. Your results may vary and Gridless Revolution does not suggest or guarantee your temperatures will match these values exactly as there are many variables that are different in each installation.
Reviews
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This works as advertised
I purchased this dump load resister to add to my existing hybrid wind/solar system. It was put together over 20 years ago and the technology for such systems has improved over the years. Before I added the dump load resister, I had to pay attention to when the wind generator was producing enough power to drive the battery voltage over 14.5 volts, and I would go about the house and turn on 12v lights to add load to the system. I found a 12v voltage-controlled relay and a 12v high amp relay. I fed the batteries directly to the high amp relay and from there to the dump load resister. I programmed the voltage-controlled relay to kick in at 14.0v which activated the high amp relay to momentarily dump the battery voltage to the dump load resister. I have been watching the setup for about a week. It is working fine, as advertized. I no longer need to worry about turning on lights to dump the excess voltage, and I have noticed that my batteries are now charged at closer to the proper full charge level than they have been in the past.