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Old 10-06-2017, 11:21 AM   #21 (permalink)
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It's trivial to fix, just adjust the power supply voltage up or down so the charger will remain in buck or boost mode for the entire charge cycle.

It's important to note buck/boost transitions affect all chargers.
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Old 10-12-2017, 07:30 PM   #22 (permalink)
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So is that the buck/boost thing that makes the chargers amperage go crazy up and down? I have two psu in series with a 25.7v output, under big load drops to 25.4v and that might be too close to the 6s max voltage. But then I cranked the PSU as high as I could to 26.5v. Still at around 70% into the charge the voltage drops to 26.2v and the output amperage began fluctutating up and down. I thought it would be ok to stay above 26v...

Edit: OK, just read it in the manuals for PL6 and PL8. For maximum output PL8 needs 26.35v input but PL6 is asking for 30.0v. Interesting...
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Last edited by Mateyhv; 10-12-2017 at 07:53 PM..
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Old 10-13-2017, 11:11 AM   #23 (permalink)
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Supply PS voltage will vary +- as load is applied to the PS. Normally less than a volt. The charger will maintain charge rate with minor supply fluctuations.

The reason buck boost is suggested is two PS at 24-25v are close to lipo battery volts. The charger has to boost supply volts or fluctuates doing so during charge. If your running a generator and runs a consistent load your fine

Follow up,
In the meantime hoping for a nugget of wisdom. Discounting buck-boost due to constant supply (meaning PS & Gen.) only variation is one or two chargers operating well under capacity. Bought another charger brandthat begins with an I, 4010 duo.

Re-wired my PS 4ea in series to 48v (50.7v actual).

Two tests, same as PL6. (PL6 limited to 40a supply). Both channels at 20A:

4 PS, supply 50.6v, charge 19.8-20v @18.9a and 75% gen loadno surging.
2 PS of the 4 powered, supply 22.6v, charge 19.8-20v @47a and 95% gen load no surging. If buck boost was the cause this be the time.

I'll miss one button charge start.

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