I have a portable 200 Watt Mono PERC panel with these specs
Voltage … Open 26.72V, Working 21.5V;
Current … Open Max 9.35A, Short 9.79A
I have a standalone Power Station by BougeRV model Fort1000
1120Wh. The power station has a PV input with specs max input 8 Amps, 12 to 30
Volts. The Power station is completely enclosed,
you cannot access the battery terminals directly, you must connect the Panels
to the PV input. I would like to
connect the panel direct to the PV input on the power station, but I am worried
that it could exceed the max input current of 8 amps, so I thought adding a Victron MPPT and setting the charge current to 8 would protect the Power Station
BougeRV customer service folks tell me the power station has
a built in MPPT, but are also advising me that I must not connect a panel that would
exceed the input limits of the power station. Here is what they said to me.
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The power station itself has a built-in MPPT. If controllers that already have
MPPT are connected together, mutual exclusion will occur in the power station
as the final end of the solar input, causing the power station to trigger the
protection function and stop working, causing unnecessary damage.
Your MPPT can change the current control within 8A, and the
voltage will drop accordingly, but the final key is the problem of the two
MPPTs.
With the Victron connected, it will be limited to 8A, but it
does not ensure that a solar panel above this current will cause irreversible
damage to the power station when connected.
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A few months ago when there was sun, no snow and when I was not
smart enough to think there could be a problem I connected my solar panels to a
Victron 75/15, set max amps to 8, connected it to my Power Station, put the
panels in the sun and observed that the current was constrained to 8 Amps. Everything was working and the power station
was recharged, then went to float mode.
Can anyone tell me what BougeRV is talking about with respect to
Mutual exclusion.
Can anyone explain what could possibly be wrong with using the
Victron 75/15 to provide a controlled input to the power station of 8 amps.
