The reason to "exercise" the generator is more to make sure that the electrical windings in the generator portion of the "generator" are dried out periodically. What we typically call a generator these days consists of the engine (gas, diesel, or propane fueled) and the electrical portion which is the actual electricity generator. Over time, due to condensation and other environmental conditions water will accumulate in the windings, the coils upon coils of small (generally copper) wire that make up the stator portion of the generator. Without periodic running (at a load) the moisture can damage the windings, and hence the generator, causing problems up to and including complete failure of the electricity generating portion of the the "generator".
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Scot & Laura Kellersberger, U.S. Army (ret)
Newmar 4 wheel drive Dutch Star 3891, SOLD
Now RV'ing on the water in a Trawler!
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