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Control maximal Charge Current from SmartSolar MPPT 150/85 with BMV 712

Dear Victron,

I have installed an oversize PV System in relation to the battery in my car (Old VW T2), which I use to demonstrate PV opportunities in Indonesian rural areas. (https://www.instagram.com/pVwKombiWanderer_t2/). All installation is private financed by us and we try to promote renewable energy to rural places in Indonesia without any payback. But step by step the local media ask us for interviews and talks in the television and we start our blog in Indonesian on YouTube :D

1. The Panels can produce 1,16 kWp under STC. Size was chosen based on the maximal allowed space on the roof.

2. SmartSolar MPPT 150/85 charge my battery with an additional SmartBatterySense and BatteryProtect BP-100.

3. Just one Luminious SMF 12V 200h is installed due to weight and lack of space (I know this is not ideal, but it is an old car and 69 kg for each battery is just really heavy)

4. SUOER FPC D1000A Pure Sinus Wave Inverter (1000W continuous power/2000W peak power)

To increase the maximal life-cycle of the battery under tropical high temperature I reduce the maximal charge current to C10, which means 20A. When I demonstrate it to the people I put some big load to my Pure Sinus Wave Inverter. Since my PV System can easily produce more than 80 A on the 12V site at daylight, I need a device which can change the maximal charge current depends from the load.

The BMV 712 can easily read the current and direction of the current which going in and out of the battery and it can be easily connected via Bluetooth to the other devices.

Is there a possibility to drive the MPPT from the SmartSolar MPPT 150/85 with the measured current from BMV 712 so that the net current to the battery is limited to 20 A?


Or is there another device which can do this which is available in Indonesia, because Victron parts I bring directly from Germany? I didn't buy the BMV on those time due to lack of money, but now because of the response and the interest I need a solution.

It is so great to see the people step by step understanding renewable energy and with my background as a physicist i can explain them a lot :D

I am really happy for any advices or helps.

Thank very much.

Best regards,

Pelangi

BMV Battery Monitorsmart solar set-up helpSmart Battery Sensecurrent limitcharge current limit
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2 Answers
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pvwkombiwanderer answered ·

Thank You WKirby :D

So if I understand what i read about the topic, i need additional a BMV (whatever, cause bluetooth is not supported yet), Raspberry pi with Venus OS and two VE.Direct to USB cable as hardware.

Did i understand it right?

For me it is not clear yet, because this is written in the manual

Color Control GX manual ->

4.4 DVCC features for all systems ->

Limit charge current ->

:

3) DC Loads are not accounted for. Even when a BMV or other battery monitor is installed. For example, with a configured maximum charge current of 50 Amps, and DC Loads drawing 20 Amps, the battery will be charged with 30 Amps. Not with the full allowed 50 Amps

What is than the different to the actual situation, because my DC/AC Inverter have no output information for Venus OS?


Will Bluetooth supported in the future in the Venus OS to avoid the VE.Direct to USB cable, since my batterysense and smartcharger already support bluetooth?

Instead of BMV can I use another shunt?

If what I understand is right, i still need to get BMV and the VE.Direct to USB cable to Indonesia.


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WKirby answered ·

You cannot do this directly between BMV and MPPT.

You can do this if you enable DVCC with a Venus device like a CCGX or VenusGX. The good news is that you can also use a cheap Raspberry pi as a Venus device

DVCC is explained in the manual here:

https://www.victronenergy.com/live/ccgx:start

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