Solar Controllers

 Why do I need a Solar Charge Control?


The principal function of the solar charge control is to provide the proper charge to the batteries, and prevent the batteries from becoming overcharged.

Think of the solar charge control as the logic for the solar panel or solar array. On their own, solar panels do not know and do not care when your battery(s) are fully charged. That task is left to the charge control. Decisions as to the proper charge rate and length of charge time are all made by the charge control.

The charge controls we offer contain reverse leakage protection, which prevents the battery(s) from discharging back through the solar panel(s) at night.

So the simple answer to the question is - You need a solar charge control to prevent the unnecessary overcharge & subsequent damage to your expensive investment in batteries!


How to choose a solar charge control?

The most important job of a solar charge controller is to process the solar output & to properly charge your batteries. This keeps your lights on, cell phones charging, refrigeration running, and it definately helps to extend the useful service life of your batteries.

There are two types of charge controllers:

PWM - Pulse Width Modulation - Older technology

MPPT - Maximum Power Point Tracking - Where the bulk of the industry is going

The difference between these two types of controllers comes down to overall efficiency and price. The MPPT solar controller, while a bit more expensive, can provide up to 30% more power by converting your solar panel(s) excess voltage into charging current. Think of the MPPT as a boost style controller. Today’s solar panels, such as the F-Series & SolarFlexx panels, can produce upwards of 20 volts, while most AGM batteries only require 14.4 volts to charge. An MPPT solar charge control takes advantage of your solar panel’s excess voltage, sending that additional charge to your battery bank, where it is needed the most.



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