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AH! This was exactly the problem I had! I needed the bike on its charging stand both in the garage and at the track. I'm only 77kg with a separated right shoulder, so none of the other suggestions will work. I certainly could not use the stoppy technique in the garage. I noticed that none of...

I looked into the Varg battery and it is a 420 V unit. This probably means that the charger is a boost converter and can take either 110 or 220 inputs. Both residential services are limited to 15A, so that is why it takes 2 hours at 220V x 15A to charge the 6480Wh battery. This puts the charge...

For a given battery resistance, R, the charging rate is V²/R so doubling the voltage cuts my charge time by 75%. Since charging on 110V takes longer than charging on 220V I can assume that the Varg charger does not have a boost converter, unfortunately. I would think that a simple transformer...

The videos I have seen are showing a max of 10 A charging, but I think you can set the charge rate to whatever you need.

Obviously, but the changing current at 220V is only 10A according to what I have seen .

I think that should work because the 220V in Europe is single phase.

The transformer would be electrically isolating so you can choose whatever ground and neutral reference you want. 220 lines in Europe still use a hot and neutral convention and which is which is random because some of the plugs are reversible.

I have a small generator with an output of 110V and 20 Amps. I am thinking of adding a step-up transformer to produce the 220V at 10 Amps that the Varg like better. Has anyone tried this? It could significantly reduce the recharge time at the track.