Author Topic: Ebike Battery as power supply?  (Read 708 times)

dabighen

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Ebike Battery as power supply?
« on: April 23, 2022, 09:19:07 PM »
Dumb question, but how would one utilize a 48v ebike battary as a backup power supply?  Seems silly to buy more battery when you have perfectly good ones sitting around.  Anyone have luck with good inverters for this?

Syonyk

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Re: Ebike Battery as power supply?
« Reply #1 on: April 23, 2022, 09:57:54 PM »
What's the pack configuration and min/max voltage?

The problem with lithium is that it has an oddly wide voltage range compared to lead, so you either end up overvolting the inverter or cutting out way early from lead low voltage cutoff.

It's totally doable, my power toolbox is based around 36V scrap ebike packs: https://www.sevarg.net/2018/02/11/building-37v1kwh-lithium-solar-power-toolbox/

gooki

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Re: Ebike Battery as power supply?
« Reply #2 on: April 24, 2022, 01:52:51 AM »
Yip. Get a 48v inverter and away you go. Epever seem the best of the mid-low priced inverters.

You will however need to make sure the inverters power output is below your batteries output (note output not capacity).
« Last Edit: April 24, 2022, 01:54:26 AM by gooki »

 

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