Thor Forums

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Originally Posted by Oneilkeys

The Axis/Vegas does not have an inverter. It only has a converter/charger. The 12v system in the RV (house lights) is between the converter/charger and the use/store switch, so the lights do work when the Use/store switch is in store and the converter is charged by shore power or the generator. His system seems to be working correctly in that sense. The humming he hears is probably the converter, not the charger if the Use/store switch is in store. If the RV is left with the chassis battery hooked up, it will also drain down to where it will not start the coach. As to why the engine started when the chassis battery was hooked up to a charger, that will happen when there is sufficient juice going thru the battery to the starter motor. How long that takes depends on the charge in the battery and the strength of the battery charger. As I indicated in the previous post, the house batteries will not charge with the engine running if the Use/store is in store. It is possible, as Ed indicated that the use/store solenoid is bad - that has happened more than once in this forum. From his description of the problem it seems possible, if not probable, that both batteries drained and the use/store switch was left on store. If he charges both battery banks, leaves the use/store in use and everything works, he has solved his problems. If not, we need more info to diagnose the problem. The use/store solenoid would be the first place I would look too.

The OP has a Miramar 34.2 so Axis/Vegas based assistance may or may not apply.