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Looks like some kind of super capacitor technology, just a completely different animal and not needed/suited for RV. The Maxwell datasheet shows this is basically a short term energy storage device (supercap!) that works with your existing batteries. The use case is that supercaps have extremely low ESR and use that technology difference to deliver very high cranking amps over a wide temperature. Great for a big diesel engine, not needed at all for RV.
To be more clear, the datasheet I read says this device takes 25A max to charge, and charges for 15 minutes. That's about 6 amp-hour of capacity. What this technology does is give you ALL that power in 10-15 seconds of cranking, very high cold cranking amps. Again, this is opposite of the the long and relatively lighter load we put on RV batteries where we look for high amp-hour capacity.
To be more clear, the datasheet I read says this device takes 25A max to charge, and charges for 15 minutes. That's about 6 amp-hour of capacity. What this technology does is give you ALL that power in 10-15 seconds of cranking, very high cold cranking amps. Again, this is opposite of the the long and relatively lighter load we put on RV batteries where we look for high amp-hour capacity.
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