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Originally Posted by Our-first-class-A
Ok thank you. I just did not know if the charger in the coach was any better in an rv vs trailer. I am fortunate enough to have my coach at home with 50 amp hook up.
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Thor MC plant 750 generally uses World Family Company (WFCO) power centers which use their own three stage converters. They have been proven to work well in most situations. The third stage is float, which means the trickle charge voltage floats from 13.1 to 13.5 volts depending on the condition of the batteries and the temperature of the charger. With this type of charger, you can leave the coach on shore power and be assured all batteries will remain fully charged. Be sure to check the water level every month as the will tend to use more water in the winter do to the way the charger works.
The drawback to this charger is there is no equalization function and the temperature of the battery compartment is not monitored. The equalization function is to overcharge the batteries so that they out-gas and stir the electrolyte which tends to stratify over time if the batteries are not used. Some chargers also send a high voltage A/C current to the batteries to de-sulfate the batteries, but if this procedure works as intended is a contentious subject. The better chargers also monitor battery temperature as opposed to assuming the batteries and the charger are at the same temperature.
I live with a three stage charger; a PPS 5355 with TempAssure which has worked well for 4 years. In-fact, I still have one of the original Harris batteries installed and last summer it checked out fine. I suspect I will have to replace it this spring.