Lithium Battery Over Discharge

2p4d1van said:

More lessons to be learned the hard way.

Well, I committed the ultimate lithium sin. I forgot to turn off my new inverter when I got up and I went off for the day, leaving my 5,000 btu air conditioner running. So, my converter says the battery is at 0.2 volts and my panels are providing 62.7 volts but only at .2 amps. Is there a way to recover the battery and why is the converter only showing .2 out of the panels when it usually shows anywhere between 6 and 15 amps? Will the .2 from the panels slowly restore the battery charge? I had a 24 volt 200 ah lithium battery before this happened. If I can save the battery, I guess my next step is to create a fail safe to prevent the inverter from killing the battery. Any sugestions? The inverter is a Reliable Electric 3000 watt pure sine wave 24V DC to 120V AC (an Amazon find) that is connected direct to the battery with a 200 amp fuse.

Unfortunately, I am on the road and away from my home base, so it may be a few days before I have the conveniences of my garage and tools, but meanwhile, I thought I might seek some advice.

Thanks in advance. Steve

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Goboatingnow said:

If the battery is genuinely dead and not a protection circuit active , you must apply a pre qualification charge.

This is typically 1/20C until approx 20 % SOC is reached.

Do not subject the battery to high C rate recharging unless the pre-qualification charge has been done as damage will occur otherwise.

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2p4d1van said:

Would 1/20C of a 200ah battery be a 10 amp charge?

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