Got a PM about how I hooked 3 12 volt sources together on a 36 volt Golf Cart battery set-up, so I drawed a picture in case someone else was interested. I use these Heavy Duty Disconnects on the Series Plug as well as on the 12 volt sources and on the inverter. I can run a inverter off either of the 3 12 volt sources, but If I want To hook all them together for more "run time" I unplug the Series plug then I have a 3 into 1 adapter made with 4 of these disconnects and some short wire-----one plugs into each 12 volt source and one into the inverter. The SERIES PLUG HAS to be UNPLUGGED or the sparks will fly. All my wires are at least 4 gauge(some 2 gauge) including the short series jumper wire that jumps from the + and _ of each battery. Edited to add-----All 3 of my 12 volt sources are run out of the battery compartment so I do not get sparks near the battery when I hook up the inverter and also so the Series plug does not get pulgged into by mistake.