Inverter/Power Pack

[BarleyRiser]

I'm looking for a way to charge ebike batteries in my campervan. What power do I need from an inverter or power pack?
One charger gives the following information:
Input: 100-240V 50/60Hz 90W
Output: 36V 2A
The other gives:
Input: 100-240V 50/60Hz 2.5A
Output: 42V 2A

 

[Deleted member 4845]

Either should work off 110, or find one that works on 12V. Depends on how the van is wired.

Depending on your battery, one of the above chargers is wrong, possibly both.