question

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bargeman asked

Argo input- What does MPPT see?

The barge had it's last upgrade in the 80's; electrical system is clean and very professional, 24vdc 220v ac. When originally set up, battery charging was done through inverter/charger either via shore power, generator or engine alternator (standard vehicle unit, nothing special). There are three banks, house, starter and bow thruster. Inverter/charger (MulitPlus Compact, new 2016) is wired to house bank with trickle charger to starting bank. Alternator is routed through old school (pre-FET) Argo with one input and three outputs (Argo model 1203, max amps 120, max charger amps 75). In the mid 2000's solar was grafted onto the system with the controller connected to the Argo on the input terminal with the alternator. Since the generator has given up the ghost I'm going to significantly upgrade the solar. All battery chemistries are currently similar although lithium is in the cards for the house bank in a few years.

Is this a good way to set this up? Is there a better way? What does the MPPT "see" when running, the starter battery and bt battery full and the house bank at 70%? When there is no alternator input?

MPPT ControllersArgo FET
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1 Answer
eien avatar image
eien answered ·

At the input of an ARGOFET (new generation) at dusk it will stop "seeing" the voltage of the battery connected to terminal 1, leaving the MPPT without service.

When the sun shines on the panels, the MPPT will start up again.

Victron DOES NOT PROVIDE A SOLUTION for these cases, it simply does not answer.

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