125V Charge Controllers
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125 V charge controllers
Charge controllers play a key role in any solar power system that includes a battery bank. Battery life and system safety can both be improved with a good model. A 125 V solar charge controller is a workable option for both large and medium-sized PV systems, depending on the amperage.
What a 125 V charge controller can do
As the name suggests, this important element controls the charging process. A solar panel system outfitted with a 125 V charge controller can typically perform the following functions:
- Check that the output of the solar panels is within safe limits
- Make sure you don't overcharge or excessively discharge the battery, as either can cause it damage
- Stop the current from flowing in the wrong direction. Without a charge controller, power might flow from the batteries to the solar panels at night, possibly resulting in a fire
- Keep an eye on your batteries and loads
- Modify the charging process settings
When you need a 125 V charge controller
You can't connect a solar panel system with a voltage greater than 125 volts to a 125 V charge controller. To ensure your solar panels have optimal open-circuit voltage, use the data provided in the product specifications. If your array's panels are connected in parallel, the system's voltage will be the same as if just one panel were used. Wiring multiple panels in series increases the voltage but maintains the same current.
Calculate the maximum number of panels that can be connected to a 125 V charge controller by multiplying the voltage of your battery bank by the controller's amperage. If you have a 48 V battery bank and an 80 A 125 V charge controller, you can run a system with twelve 320 W solar panels (48 * 80 = 3840).
How to choose the right 125 V charge controller
The choice between pulse width modulation (PWM) and maximum power point tracking (MPPT) is a key consideration when shopping for a charge controller.
When looking at cost, a 125 V PWM solar charge controller is the best option. Also, the simpler construction of this type of controller contributes to its greater durability. The typical lifespan of a PWM charge controller is between 10 and 20 years. To a large extent, durability and affordability come at the expense of effectiveness. In addition to having less direct control over the charging process, a 125 V PWM charge controller has an efficiency of only about 75% to 80%. More importantly, when the battery and panel voltages are different, too much power is lost by using this type of controller.
If you're looking for a 125 V solar charge controller for sale, consider the models that leverage the MPPT technology. These are more expensive, but give you greater control over the charging process and have an efficiency of up to 99%. Depending on the manufacturer, the average lifespan of these controllers is between 10 and 15 years. Using a much lower voltage battery and a 125 V MPPT charge controller can significantly reduce wiring costs.
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