question

Rudolf Zobel avatar image
Rudolf Zobel asked

Adjustable DC Power supply on MPPT.

Sure, here's the corrected text:

Hi guys,

I am powering a SmartSolar MPPT 100/20 48V with an adjustable DC power supply. Most of the time it's working fine and I can regulate the battery charging current simply by changing the current on the power supply. The MPPT does its job and the charger adjusts the current on the battery side:)

But sometimes it looks like the MPPT gets stuck for a few minutes if I want to increase the current.

Now I am trying to find out how to trigger the MPPT to check for a new Maximum Power Point. Does anyone know how the MPPT algorithm is working?

I am using this for my excess energy from the PV system.

I am also thinking about adjusting the charging current by the settings in the SmartSolar by sending commands on the VE.Connect serial port. But I am not sure if the system can handle so many adjustments (worried about memory issues if writing this value more than 100 times per day).


Thanks in advance,

Rudi

MPPT SmartSolar
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1 Answer
Mike Dorsett avatar image
Mike Dorsett answered ·

brute way to trigger the MPPT function would be to turn off the DP psu until the blue bulk light starts to blink. Then turn it back on again.

Smart way to do this, would be to use the VE-direct hex mode commands. Whilst the battery parameters are not intended to be written to more than a few times, there is a ram register for receiving the output current set point,- I think this is 2015h but you should check that in the hex protocol document.

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