Join Date: Jul 2006
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Powering AC with genreator, handling surge load
I recently got a 2000 watt generator -- a little 2.7hp model. To operate it I simply plug a standard adapter which converts a standard 120v plug into a standard 30amp shore power plug into its 120v and hook my shore power cable into that adapter, and into the shore power socket. It works great, and powers everything BUT the AC. My AC is 16000btu, and draws a modest 4-5 amps under running condition (4-5amps*120v should be around 600 watts, P=IV), however, when the compressor kicks on it draws between 15-30amps. This is no problem on shore power but this surge is beyond the generator's capacity and it cuts out.
I realize I could go to a larger generator, but I do not want the additional weight nor size.
I was wondering if I could run power to the shore power in parallel -- one side of the circuit coming from the 2000 watt generator, and the other coming from a 2000-4000 watt inverter attached to the deep cycles. I theorize that when the AC kicks on, it will draw additional current from the battery to deliver the the necessary amps to kick on the compressor, and then when it drops down to running level amps (4-5amps) I can simply disconnect/switch off the inverter from the batteries, allowing the generator to carry the load on its own for the rest of the time.
Is this feasible? Has anyone experimented with a similar setup?