Technical Bulletins

5 Steps to Size Controllers for Low PV Panel Temperatures

Winter brings a surge in technical support calls related to damaged controllers due to low temperature effects on PV panels. This bulletin covers five steps to size controllers for low PV panel temperatures and important tips for sizing PWM and MPPT solar charge controllers.
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Bad Battery Shutdown Prevents Damage

Bad batteries or missing batteries can cause damage to solar charge controllers. Phocos’ Bad Battery Shutdown feature automatically adjusts to bad battery conditions, preventing damage to the controller and connected loads until stable battery health is restored.
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PWM or MPPT?

Can’t decide between a PWM or MPPT charge controller? Whether you’re just getting started in off-grid or you’re an experienced installer this guide will help you determine the best type of controller for your next solar project.

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Phocos POWER+

Phocos’ Power+ technology is a feature in Phocos’ Maximum Power Point Tracking controllers that allows you to oversize your PV array by 50% in order to maximize you power production in colder, less sunny winter months without risking damage of your controller during hotter, sunnier summer months.

> Download the bulletin.