I have a question about the possibilites to buffer a battery in a solar project for my summerhouse.
It has the typical ciruit: A solar module, a charge controller and a lead acid battery.
Looks the schematic ok? The arduino sketch doesn’t exist at the moment but that’s not the problem (I hope so).
Pin1 – Ground
Pin2 – Output to load
Pin3 – Input from battery
Pin4 – Input from power adapter
It simple should switch over the input from the battery to a 230V/12V adapter
when the solar charger switches off the power from the load because
of deep discharge protection of the battery.
Now it comes into my mind not to use an arduino at all and simple connect
the 12V power adapter parallel to the battery or load or the solar module.
Has someone an idea how to do this or recommendations?