Iron Edison

Nickel Iron (NiFe) Lithium Iron (LiFePO4)

Free System Design! Call 720-432-6433

How to Size a Charge Controller for your system

How to Size a Charge Controller for your system

Whenever we talk about how to size a charge controller, the very first thing that comes to mind is what is a charge controller? It is a controller which limits the pace of current that goes to and from the battery pack. Charge controllers are fundamental to avoid totally depleting a battery. Such activity can diminish battery execution and the life expectancy of a battery drastically.

Features of charge controllers:

  • Overt Overcharge
  • Control calculation
  • Temperature remuneration
  • Equalization charging
  • Meters and markers for framework status and working data

The easiest way to calculate the size is using the equation below.


Take the number of panels x watts to get the total watts of the solar array.

You then divide it by the voltage of your battery bank to get amps

Add 25% to allow for cold temperatures and as always, round up.

Example: 2 x 300 watt solar panels in series = 600 watts / 24 VDC battery bank + 25% = 31.25 amps.


Free solar + battery system design


Installer network across the USA


Free installation support


Lifetime technical support

Iron Edison is owned and operated by Brandon and Maggie Williams. They have three children, and live and work in Colorado.

Brandon and Maggie believe in energy independence and for the past 10 years they have helped thousands of people achieve their goal of powering their homes with batteries and solar. We love working everyday with our customers and we hope you decide to choose Iron Edison for your battery and solar needs.

the Williams family

Contact Us