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If you have a 20 kw lead acid battery and you add a 22 kw lithium ion battery, you can probably double your range from 40 miles to 80 miles. The lithium ion battery only adds about 5% to the total weight. A generator trailer with a 50 pound battery, extends your range, probably, until you run-out of fuel for your trailer = 1000 miles. Possibly your generator trailer can have two powered wheels which are energized when climbing steep hills and when you want rapid acceleration, besides providing some extra storage space which is often useful on long trips. A trailer with powered wheels can also provide some dynamic breaking down steep hills and for quick stops. You probably want to leave your trailer at home for driving around town, but it can also provide some emergency power for your house, if the utility is blacked out. Neil
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