Generator sizing by load
RV Generator Size by Startup Load
Pick what you want to run. Each page gives running and starting watts, the generator size that covers both, whether a soft starter is the cheaper fix and whether a battery could do it instead.
14 pages in this section.
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an 11,000 BTU air conditioner
Running an 11,000 BTU air conditioner needs about 2,400W of generator starting capacity, or roughly 1,650W with a soft starter fit
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a 13,500 BTU air conditioner
Running a 13,500 BTU air conditioner needs about 3,000W of generator starting capacity, or roughly 2,040W with a soft starter fitt
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a 15,000 BTU air conditioner
Running a 15,000 BTU air conditioner needs about 3,500W of generator starting capacity, or roughly 2,420W with a soft starter fitt
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two 13,500 BTU air conditioners
Running two 13,500 BTU air conditioners needs about 4,400W of generator starting capacity, or roughly 3,440W with a soft starter f
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an air conditioner and a microwave
Running an air conditioner and a microwave needs about 4,500W of generator starting capacity, or roughly 3,540W with a soft starte
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an air conditioner and a converter charging
Running an air conditioner and a converter charging needs about 3,750W of generator starting capacity, or roughly 2,790W with a so
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a microwave
Running a microwave needs about 1,800W of generator starting capacity, or roughly 1,620W with a soft starter fitted.
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an induction cooktop
Running an induction cooktop needs about 1,800W of generator starting capacity, or roughly 1,800W with a soft starter fitted.
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a residential refrigerator
Running a residential refrigerator needs about 800W of generator starting capacity, or roughly 410W with a soft starter fitted.
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an electric water heater
Running an electric water heater needs about 1,440W of generator starting capacity, or roughly 1,440W with a soft starter fitted.
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a coffee maker and a toaster
Running a coffee maker and a toaster needs about 2,100W of generator starting capacity, or roughly 2,100W with a soft starter fitt
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a whole rig summer load
Running a whole rig summer load needs about 4,800W of generator starting capacity, or roughly 3,840W with a soft starter fitted.
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battery charging only
Running battery charging only needs about 750W of generator starting capacity, or roughly 750W with a soft starter fitted.
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a space heater and lights
Running a space heater and lights needs about 1,600W of generator starting capacity, or roughly 1,570W with a soft starter fitted.