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electric bike

Anybody got any experience of charging batteries on an electric bike, we will be using the power from on board mostly only sometimes using mains ie. marinas. simple electronic calculation please.

Asked by: Peter Wright  | 7.48pm, Wednesday 19 September

WW says:

There is no reason why you should have any problems charging electric bike batteries on board, as long as you have an invertor. Electric bikes typically operate at 24 or 36 Volts and the chargers available are mains driven.
To calculate the power that will be taken from the boat batteries to charge an electric bike; firstly check the voltage and capacity of the battery. Then divide the voltage by 12, and multiply the amp hour capacity by the result. For instance: a 36V, 10Ahr bike battery will give a result of 30Ahr at 12V. This is the minimum amount of power that will taken from the boat battery, it will probably take about 25% more allowing for the charging process and running the charger and invertor. If the bike has a fast charge option this might be more efficient when charging away from a marina hook-up, as the charger is not consuming power for such a long time. It would however be worth putting on to float charge when mains power is available.

Rupert Smedley  | 3.55PM, Thursday 20 September

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