Automatic Solar Grid Tie Switch v2.0

I’ve been working on a new version of my automatic grid tie switch.  If you haven’t seen my previous post or video it’s a device which will switch my sheds solar panels from the battery charge controller to a micro grid tie converter depending on the battery voltage.  The idea is I want my solar panels to deliver everything they’ve got for as long as they can each day. Continue Reading →

Automatic Solar Grid Tie Switch v1.1

My solar shed now generates more power than I can regularly use.  I wanted a way to use that excess energy, but ensure my battery was kept fully charged.

I’ve recently bought a couple of Arduinos to have a play with.  They fit this purpose perfectly.  They can run from the battery, but use very little power.  Using a voltage sensor (which is a simple, pre-built voltage divider) and a relay board, I can easily change the relay based on the voltage input.

This is my first project, so please be kind on the code.  I’m still learning!

Continue Reading →