will a 100/20 MPPT controller have a conflict with a bcdc charger

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graveyphil asked May 11, '22

will a 100/20 MPPT controller have a conflict with a bcdc charger

I have a bit of a problem with how I want to connect a new 200w panel.

Background:- My auto electrician found my two existing solar panels [in parallel] are putting out 37volts rather the the max 28 stated by the manufacturer. He could not connect them to the bcdc1250d charger [which also has a 750w MPPT controller but a limit of 32volts] he had just fitted so added a victron 100v/20a MPPT charger... An additional panel on this would be over 20amps, so I wanted to add a new 200 w panel to the redarc bcdc charger to utilise the 'green' function that uses solar before the alternator current. Id prefer not to go to series panel connection due to shading from roof vents and a satellite dish.

Question? Could there be conflict between new 200w panel connected via the bcdc1250D and the 2 old 140w panels connected via the victron 100/20 MPPT charger

Currently while the bcdc is working fully while driving the old solar potential is not being used

thanks

MPPT Controllers battery charging charger

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klim8skeptic ♦ commented · May 11, 2022 at 10:49 AM

Question? Could there be conflict between new 200w panel connected via the bcdc1250D

What the frack is a bcdc1250D controller??

Link??????

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graveyphil klim8skeptic ♦ commented · May 12, 2022 at 07:30 AM

redarc bcdc1250d https://www.redarcelectronics.co.nz/dual-input-50a-in-vehicle-dc-battery-charger

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Modifications Space

Node Red Space

Answer 1 · 2022-05-12T08:41:27Z

klim8skeptic answered · May 12, 2022 at 08:41 AM

Seeing as the Redarc has a limited # of presets, it would probably be best to set the bulk/absorb voltage in the 100-20 to the same voltage as the redarc.

I would set the float voltage in the 100-20 to the battery manufactures specs.

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