Battery charger built into 8000w 12v Power Jack inverter.

Stuart
8000w at 12v is a current of at least 660 amps, BIG cables needed there, but the terminals on the unit seem far too small for such current, let alone the 32000w claimed as the peak. Methinks the claims and reality are a bit different to each other.

Only someone with knowledge of the circuit would be able to detect the threshold voltage at which battery charging begins. It may be adjustable on an internal pot. Many Meanwell dedicated chargers, I have a 30 amp device, do have an adjustment on their charge voltage, yours may be similar for that threshold voltage to initiate the charge earlier than currently set.

An electronic oriented person may be able to find such a pot, or infact alter the crucial detection point via replacement/modification to some components.

Alan B on here, used to bury 'is 'ed in such things and might have a solution or more info for your problem.

Ì have a 3000/6000 lf version of the pj inverter. Firstly, they are a piece of junk, but was fun to muck around with. The 'sine wave' output was the worst looking sine wave I'd ever seen. Near about 400 watts, it looked more like a square wave. I would not trust it charging my batteries! There is quite a following on an alternative energy forum where one bloke went to a whole heap of effort fitting a filter circuit that cleaned up the output and decreased the standby current.
I worked out the efficiency to be about 72%. It weighed about 17 kilos from memory (lf xformer). Ditched it and got a 1500 watt hf from Elinz. Pretty cheap also, but the sine wave output is perfect, and the regulation works up to it full output (1500 watts).

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Hi Stuart,

I have no direct experience with this product but after reading the expressions made by the supplier I can say that what is written does not stand up to scrutiny. In short it is technical nonsense. So I suspect that the product is also 'technical nonsense'.

My only recommendation is to cut your losses. Get what compensation you can or throw the whole thing into the bin before it burns your vehicle down.

This reference may further support my opinion.

Hi Stuart
I would reconsider using Power Jack
After I had 2 fails I would not use them,
I have a brand new replacement 5600 watt peak and 2800 cont. I use it now to prop the cupboard door open ,the modified sine wave is crap beware, you will stuff your electronics up ,might be ok on a toaster as long as it has no electronic ,best to cut you losses
cheers bob