My daughter is helping me with the electronics and the wiring.  We took the old electrical panel, which will be thrown out, and attached it to a plastic box.  Ripped out a bunch of the circuit breakers, attached an old volt meter and amp meter, both of which I already have new ones, attached a lead to some mini jumper cable like clamps for the batteries and another line from a circuit breaker to some alligator clips.  Now we can hook up various electronics and test them out.  I have boxes of electronics that I have never seen work.  This is a great, safe way to test everything.  My daughter is picking up on this stuff fast.  The red circuit breaker goes to the two clips for our test circuit.  The rest are not hooked up.  One circuit breaker turns on the Digital volt meter.  Picture shows a light working.                                                              ..