Quote Originally Posted by daveimi View Post
If you want to run 24V with bursts of 72V, surely it's as simple as using a remote switch to bring the other two packs in series with the circuit?

I understand you want bigger and badder, it's the DC - AC conversions and Inductor packs I don't see the point of. It's quite probably in my ignorance, but is there a benefit to using inductance and ac-dc conversion to achieve the step up in voltage?
Not using AC conversion.

But in answer to your question, the regs limit the number of battery cells that can be wired in-series. You can't get anything like 72v by doing that.