Bob,Robert K wrote: ↑Sun Aug 09, 2020 3:12 pm Well I got the duracells in after modifying the battery box. Plugged in the shore power and the inverter/converter made a grinding like noise and now no 12 volt from converter. No smoke or burning smell but it probably is not good.
I know there should be a big fuse somewhere.
I don't know if the 4 batteries at 12.7 and the 2 chassis batteries on a trikl start were to much
If you follow the positive inverter cable from the battery to the inverter, you should come across a type "T" high amp fuse. Mine is slightly to the drivers side of center, attached to the front of the bed box, in the engine compartment. Yours is probably not that far off.
Before giving up on the inverter, I would suggest to check the 30 amp breaker in your main breaker panel, and also check the 120v ac input connections inside your inverter. Most are mated with wire nuts, combining solid copper wire with stranded wire, that combination is known to get loose, especially in RV applications, and can and does arch out under load.
If you do end up needing an inverter, consider Magnum MS series. It is a premium pure sign wave inverter, that is made in America. It is one of the very few companies, if not the only one, that is still make them in America. I have been very happy with mine. They also make very nifty hybrid inverter that works well for people that do frequent moochdocking on limited power. It assists, and allows you to draw more power than the limited shore power can provide. After the load decreases, it automatically switches back to charging the batteries back up.