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Old 05-05-2020, 13:52   #1
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Use stupid ac/dc adapter as charge source

My shore power charger is a Cristec 40A charger. It is connected to my sterling alt-bat charger which then supplies the charging for my 200ah lifepo4 bank. Works ok but this setup only supplies 24-25A at most to the Lifepo4 and the Cristec is going from boost to no-boost and lowers the voltage which actually stops the charging completely (the sterling wants >13,5v to charge.) I also want to be able to speed charge the batteries when stopping at a dock for shopping or water filling etc. I also want to be able to start my Honda10 and charge at max for an hour.

To achieve the above I am thinking of doing two things:

1. Change the boost/cycle setup on the Cristec to be just a constant Voltage of something like 14. No stages.

2. Add a simple ad/dc adapter in parallel with the Cristec into the sterling.

I have ordered a Mean Well PSP-600-13-5

40A 13,5 V one like this:

https://www.elfa.se/Web/Downloads/sp/ec/psp-600-spec.pdf?pid=${product.code}

and plan to set the output to something above 13,5v to satisfy the Sterling.

Combined the two should give me like 65-70A charge current which fully charge my bank in like less than 3 hours from empty. It should also be possible for the 1kw Honda to manage. If itís successful I might buy one more and put in parallel to have 110A if needed.

Any comments or thoughts of this setup? Anyone tried it already? I donít see the point of buying an expensive battery charger when I already have a device with a lifepo4 ďprogramĒ. The ac/dc thing was like 150 euro and thatís like 1/4 of a charger with the same capacity.
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Old 19-05-2020, 13:16   #2
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Use stupid ac/dc adapter as charge source

Now I tested the ac/dc adapter it gives me 65A together with the Cristec. Exactly what I wanted. Havenít tried it with the Honda yet but will do that tomorrow.Click image for larger version

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ID:	215405 Hopefully the Honda eu10 can manage the 900w continues draw
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Old 20-05-2020, 06:56   #3
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Use stupid ac/dc adapter as charge source

Tried the setup today again. I had some load on the battery bank over night so the lifepo4 was ďhungryĒ when I connected the power today. It worked great for like 45 minutes. The new ac/dc transformer put out like 40A just like itís rated for. The batteries gladly accepted 62A charge. But then it suddenly stopped with a burned smell.... now I canít get it to work again. It was suppose to have a over temp alarm that you could reset by power on but this doesnít work either. Have the lifepo4 put an overload on it and destroyed it? Any thought?
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