AC charger overheating?

I noticed that the AC charger for my AC200MAX was dangerously hot, as was its DC cord. Enough so that the insulation had started to melt.

It’d been a few weeks since I’d used the chargers and I’d noticed nothing wrong then.

This time, though, I had the DC output turned on, and I had the charger sitting on top of the AC200MAX.

Is there any possibility that the magnetic field that the wireless charger was interacting with the coils in the charger, causing the charger to output more current than it was rated for?

sorry to hear that. Whenever I’m charging my AC 200 Max I put the charger on the floor. I noticed it does get a bit warm. Had my units for about a year, never had any of the cable or anything like that melt. Sorry to hear that but I would definitely give it a good several wraps with some electrical tape and try to avoid putting it on top of the unit while charging, if possible.

When I plugged the charger in, after unplugging it and letting everything cool, something inside sparked. So I’m tossing it and buying a new one.

I’ll not put the charger on top of the AC200MAX again, but if that was the cause, it’s something that we should publicize.

If it’s hot enough to melt insulation, it’s hot enough to start a fire. And people should be aware of this.

@jdege I’m sorry for the inconvenience. In general, it is recommended not to leave the charger on the AC200MAX while charging to avoid overheating. In your case, please contact the seller to replace the AC charger.

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Hi @jdege sorry to hear you are having problems with your charger. In the picture has it melted the casing of the unit. Was it the full cable or just at the point where it melted the case that got excessively hot? I would definitely stop using the charger and get a replacement from wherever you bought it from just to be on the safe side.

The melted line along the case is where the charger cable was lying. The damage to the case was only cosmetic. The cable itself was hot from end to end.

I’ve already ordered a new charger.

I suppose it should have been obvious that the magnetic fields of the wireless charging pad would interact with any electrical coils placed on it, but I didn’t think of it until after I noticed the overheating.

It seems to me to be a potentially dangerous failure mode.

I sent an email to Bluetti support, asking them to see if they could replicate it, and suggesting that they might consider providing warnings against it, but I received only a canned response.

As a follow-up, I received a more complete response from Bluetti support.

They will be passing along my concerns to their technical staff.