1. TYPE battery will NOT cause lack on Inverter to Invert. It WILL cause incorrect CHARGE if The 458 is not set to the correct type battery
2. The simplest way to test is to verify that there IS 12 volts positive to the Battery connection on the Inverter. DISCONNECT the remote harness and activate the Inverter at the button on the Inverter. TEST the 120 connections AT THE INVERTER where the romex wires connect. IF NO 120 output, your Inverter has a bad board(as long as you have checked the breakers on the Inverter) probably caused by the battery miswire.
3. When you are NOT inverting and plugged into Shore or Genset, do the TV's and Microwave appliances work?(Pass thru is working on the Inverter). If so, you do NOT have to do the test on item 2.
4. How old is the 458? Doug
