How do I choose the right PWM solar charge controller?

To choose the right PWM solar charge controller for your system you have to calculate the maximum current that your solar array can generate. This is done by multiplying the short-circuit current of your whole solar array by 1.25 (NEC’s safety factor). For example:

Should I use a PWM solar controller?

If you find yourself in the following situations, a PWM solar controller would be a better choice: Small solar energy systems, such as installing lead-acid batteries in a camper, where the solar panel voltage closely matches the battery voltage. When charging efficiency is not a primary concern, such as maintaining the charge of marine batteries.

What is the difference between PWM and MPPT solar charge controllers?

Normally, due to the increased circuitry, MPPT solar charge controllers will be physically larger than PWM solar charge controllers. Properly wired, it is possible to add multiple solar chargers (any combination of type and rating) to charge a battery.

Can a 10A PWM controller be used on multiple solar panels?

This charge controller does not have to be used solely on one panel and one battery; a 10A PWM controller cab be used to regulate the charge of an array of solar panels connected in parallel with a total power of 160W.

Which panel is best for a PWM controller?

The best match for a PWM controller: The best matching panel for a PWM controller is a panel with a voltage just above provided for charging the battery and taking into account the temperature, usually, a board with a Vmp (maximum voltage) of about 18V to charge a 12V battery.

How do PWM solar panels work?

PWM types are relatively simple, using a switch between the PV array and the battery. The switch is able to open and close rapidly, thus being able to pulse or “throttle back” the electricity coming from a solar panel in order to taper off the charge current as the batteries become full.