November 15, 2019

What are tips for sizing a PWM charge controller to my PV panels?

Here are 3 important reminders for sizing PWM controllers:Tip #1 PV panel Vmp > controller’s overvoltage protection level for the battery.The panel voltage at maximum power (Vmp) should be higher than the controller’s overvoltage protection level for the battery. The battery overvoltage protection level is typically 15.5V for 12V systems

November 15, 2019

What are tips for sizing a MPPT charge controller to my PV panels?

Here are 2 important reminders for sizing MPPT controllers: Tip #1 PV panel Vmp > controller’s minimum solar input voltage.The panel voltage at maximum power (Vmp) should be higher than the controller’s minimum solar input voltage specification. For 12V systems, this is typically 17V. For 24V systems, this is typically

November 15, 2019

How do I correctly size my charge controller for wintertime low temperature effects on PV panels?

Cold winter temperatures can damage controllers due to low temperature effects on PV panels. Damage occurs when the cold weather panel voltage increases above the Standard Test Condition (STC) ratings. Below is a quick, five-step worksheet to size your controller appropriately for low PV cell temperatures. You’ll need to have the manufacturer’s

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