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If you’ve followed us for a while, you probably know that I installed a rockin’ 20,000 Watt-Hour electrical system in our Number one a few years ago.  And if you watched our video last week, then you also know that Winnebago’s new Revel includes their PowerMax electrical system, which is also pretty cool.  So when Winnebago asked us to help explain their Winnebago Power architecture, I couldn’t resist comparing it to our own 20k system.  How do they stack up?  Watch the video!


I love our 20k system, and I have complete confidence in it because I built it out myself.  But I have to be honest, there are some capabilities in the PowerMax system that I really wish I had.

Crazy Fast Charge Rates

Our 20k system is built around a 12 volt battery bank.  The PowerMax system is built around a 48 volt battery, which allows it to provide insanely fast charge rates.  How fast?  Like over 7,000 watts at cruise – which is literally twice as much as I’ve ever been able to achieve.  Basically, charging 48 volts at 7,000 watts requires about 150 amps of current.  That’s a lot, but it’s manageable.  To charge a 12 volt battery at 7,000 watts would require around 500 amps of current, which would require ludicrously large cables to manage safely.  So I’m sort of at the limit of what I can do with 12 volts.

Space and Weight Savings

The 20k system loses this battle.  The EcoFlow Power Hub Pro that’s part of the PowerMax system is one smallish box that takes the place of several boxes in Number One.  This nets a savings in both weight and space.  And I could always use more space in our RV.

Reduced Complexity

One of the things I noticed about the PowerMax system is that with fewer components and connections… there are fewer places that things can go wrong.  Fewer points of failure is always a good thing!


I won’t say I’m on the verge of selling Number One or anything like that.  But after getting to know PowerMax a bit better, I won’t completely write off the prospect of a 48 volt conversion project somewhere down the line…