Solid State Relay saves another 40mW

A project log for Arduino MPPT Solar Charge Controller

The charge controller consists of a buck converter that is controlled by an Arduino via a half-bridge driver.

TobiasTobias 06/09/2016 at 20:560 Comments

I have been working on ways to reduce the power that the solar charge controller draws without charging the battery or powering loads. The SSR brings the coil current down to 1.7mA with a 2.2K resistor on the Arduino output. That's about as low as I think you can get it. On the relay output side, the system can power a Banana Pi (or Raspberry Pi) through the relay without problems. The relay is a Panasonic AQV252G.