question

elvis avatar image
elvis asked

Multiplus II Charge LED's off during grid lost.

Multiplus II Charge LED's off during grid lost.

All 3 (Bulk, Absorption, Float) are off, yet Charging is taking place.

Shouldn't there be some indicator of the charge status during grid lost when PV is abundant?

The MPPT's are still under EXT Control so I would expect one of the 3 LED's to be on.

Multiplus-IIESSchargergrid
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3 Answers
Mike Dorsett avatar image
Mike Dorsett answered ·

The mutiplus has 2 modes, charger mode (requiring external AC In) and invert mode. with grid loss, the unit is always in invert mode - or off. The inverter is a '4 Quadrant' inverter, which means that if you have a grid connected pv inverter connected to it's output, and the pv power is greater than the loads, the inverter 'takes' power from the AC bus and charges the battery with it. Thus whilst the inverter may be charging the battery to the 'Absorption' voltage, the charger section of the inverter is still off - hence no led's on the charger side.

If you need to know the status, then you need to check with a Venus device or Victron connect app.

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elvis avatar image
elvis answered ·

@Mike Dorsett

Thats kinda what I was wondering but there does not seem to be anything in the apps that will tell me Bulk, Absorption, Float. Or am I just missing it?


Thanks

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Mike Dorsett avatar image
Mike Dorsett answered ·

Not sure on that, as I don't have grid connected pv on my system. But basically, the inverter will use frequency shift to control the PV output in a simple system. So if f = 50Hz, you are in Bulk, if F = 52Hz, you ate in float. There is a configuration in the inverter set up to control at what point the frequency switches. Hope that this has been set up and activated.. You need the VE configure and Mk2 or Mk3 to check that.

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