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Technical Support / Remind me please
« Last post by Joel Ashley on Today at 03:16:05 AM »As some here know, due to one or either or both of us having medical issues, our coach has been parked by the house for nigh-on a decade. I’ve had issues with varmints getting in the basement somehow and perching on the inverter (Magnum 2012) when it’s on, keeping the batteries up over winter. They like the warmth apparently. A few years ago I tried anti-rodent expanding foam under the coach where looms penetrated the rails through the tank bay that adjoins the main storage bay where the inverter mounts to the ceiling. But I had to guess at where the loom hole was, and had a time seeing what I was doing under there, foam bits went everywhere, including on me; I may have only somewhat mitigated the problem, not solved it, because I couldn’t get in a good viewing position. And the critters are obviously undeterred, except by the inverter no longer being on and warm.
Well I got the inverter repaired that time, but for awhile now it’s again been out of commission. The solar system keeps the batteries up, but the inverter wont turn on. I assumed the worst when I saw old leaves and such in the wires next to the inverter today. It was a bear to get off the ceiling and replace twice before. And after 6 surgeries since 2025, I’m at 78 only now up for tackling getting in and out of tight environs for repairs.
Today I did preliminaries, cleaning out the detritus and such, and opted to do first things first, finding no voltage at the red DC input terminal of the unit. My voltmeter sees nothing between the left side of the 300A fuse in the battery bay box and battery ground post, but 12+ volts on the right side. So if I may thank the gods not to have to lift that inverter off the ceiling again (a fun project twice before!), am I on the right track simply replacing that Littlefuse JLLN 300? I need a brain refresh, as I think I replaced that fuse once before.
Crossing fingers that any long dissipated squirrel/chipmunk contaminant is no longer shorting internal wiring, and that I can find a permanent prevention?
Joel
Well I got the inverter repaired that time, but for awhile now it’s again been out of commission. The solar system keeps the batteries up, but the inverter wont turn on. I assumed the worst when I saw old leaves and such in the wires next to the inverter today. It was a bear to get off the ceiling and replace twice before. And after 6 surgeries since 2025, I’m at 78 only now up for tackling getting in and out of tight environs for repairs.
Today I did preliminaries, cleaning out the detritus and such, and opted to do first things first, finding no voltage at the red DC input terminal of the unit. My voltmeter sees nothing between the left side of the 300A fuse in the battery bay box and battery ground post, but 12+ volts on the right side. So if I may thank the gods not to have to lift that inverter off the ceiling again (a fun project twice before!), am I on the right track simply replacing that Littlefuse JLLN 300? I need a brain refresh, as I think I replaced that fuse once before.
Crossing fingers that any long dissipated squirrel/chipmunk contaminant is no longer shorting internal wiring, and that I can find a permanent prevention?
Joel