1) The top breaker switch (5A red one) labeled "Master" triggers the 85A continuous duty relay at the battery to put juice in the feed wire that runs through the fender to the rear power terminal post junction. Power to feed the breaker runs through the ignition switch to make sure it can't be left on with the ignition turned off.

2) The next one labeled "12 Volt" is a 50A breaker that serves as a main breaker and throws power from the power post junction to a smaller junction terminal which supplies power to the inverter and to the two lower "Port" and "Starboard" breakers. When the "12 Volt" breaker is thrown, the inverter is live (if the inverter switch is turned on) and power is available at the lower two 12v breakers.

3 & 4) These are individual 10A breakers that protect the 12v receptacles (each rated at 15A).

Larger inverters are available, but require heavier wiring. I'm happy to have the use of a fridge, battery charger and air compressor with convenient outlets on each side. If a second battery is desired, the inverter can handle a small charger for it as well. What makes the whole package work without a fuss is the HO alternator feeding a Concorde 100AH AGM battery that takes the alternator charge in a hurry - supposedly up to 10-15 times faster than a regular lead acid flooded cell battery.

Frank