You can use extension cords from your portable generator to power any device with a plug, but anything that's directly connected to your home's wiring, including essentials like your well pump, furnace and electric water heater, requires a transfer switch. A manual transfer switch is essentially a small circuit breaker box that you mount next to your main electrical panel. You match the capacity of the transfer switch to the wattage of your generator. Then you choose which circuits to…
The shoreline cord connects your RV distribution center to power. Older models have a J Box, which has a receptacle coming from the generator and another that goes to the distribution center. This requires you to have to go outside and plug in the generator every time you want to use it. Newer models come with an automatic RV transfer switch already installed. It is possible to upgrade older models to an automatic 30-Amp RV transfer switch to put everything in a single box.
20,000-Watt Automatic Air Cooled Standby Generator with 400 Amp/Dual 200 Amp Transfer Switch
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16,000-Watt (LP)/16,000-Watt (NG) Air Cooled Standby Generator with 16 Circuit 100 Amp Automatic Transfer Switch