MEASUREMENT TECHNOLOGY MTL2215 IS OUTPUT SWITCH OPERATED RELAY USED-GUARANTEED

You will find that the split charge relay switches automatically, so you never have to thinkling anything manually.

The WAGO brand is a nice touch, and it helps me remember where I bought the part later on.

If you care about makers, you will find that the Dold brand is right there, and that detail can build confidence during installs.