Smart Solar MPPT temperature compensation

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Ivar Wagle asked Oct 23, '18

Smart Solar MPPT temperature compensation

Hi
Just bought the SmartSolar MPPT250/85 (SCC125085210) along with a Smart battery sense when I came by an article stating that the devices are incompatible:

https://www.victronenergy.com/live/victronconnect:ve-smart-networking

Bummer.

1. Can/will the charger become compatible with the VE.smart networing and the Smart Battery Sense through a future firmware update, or is this a hardware issue?
2. On a system with a CCGX and BMV 702/712, can the SmartSolar charger voltage compensate from the temperature data on the BMV, that should be available on the VE.bus? DVCC?

MPPT Controllers CCGX Color Control Temperature Sensor temperature compensation

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Guy Stewart (Victron Community Manager) answered · Oct 23, 2018 at 09:54 AM

Sorry to hear that your new MPPT isn't compatible. The compatibility list is here. I don't have any more info about why, or if it will compatible in the future however....

2. A connected system with a VENUS-Device (eg CCGX), BMV-712 with temp probe, and MPPT, which all have the latest firmware and DVCC enabled will use that temperature information for adjusting charging voltages.

In that case there is no VE.Bus necessary, the information will transmit via VE.Direct.

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mvader (Victron Energy) ♦♦ commented · Oct 23, 2018 at 05:11 PM

Hi all, for (1): the models listed as incompatible are not and also will not become compatible. Sorry.

It is bevissen of a hardware issue. (Older model of Bluetooth chip is what I recall).

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Guy Stewart (Victron Community Manager) answered · Oct 23, 2018 at 12:08 PM

Correct. That is the expected behaviour.

This was a feature of VENUS added in version 2.20, and announced here by Matthijs.

Add shared temperature sense, and a switch (default on) for the feature. At present only a single configuration is supported: a BMV-702 or 712 with the temperature sensor accessory. When such a battery monitor is connected, and temperature sense is enabled, the Venus-device will send the battery temperature to the connected Solar Chargers and Inverter/chargers.

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Answer 1 · 2018-10-23T12:02:39Z

Ivar Wagle answered · Oct 23, 2018 at 12:02 PM

Thanks, @Guy!

So, just to be clear. When the DVCC is enabled on the Venus device, it is the temperature meassured on the BMV-712, not the ambient temperature in the MPPT-charger, that will be the parametre from which the temperature compensation is calculated?

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Guy Stewart (Victron Community Manager) ♦♦ commented · Oct 23, 2018 at 12:07 PM

Correct. That is the expected behaviour.

This was a feature of the VENUS added in version 2.20, and announced here by Matthijs.

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Answer 2 · 2018-10-23T13:25:51Z

Ivar Wagle answered · Oct 23, 2018 at 01:25 PM

Awesome. Thanks!

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Answer 3 · 2020-02-20T10:19:03Z

Patrik Kall answered · Feb 20, 2020 at 10:19 AM

I have a Raspberry Pi with Venus OS, connected via USB/VEDirect to one SmartSolar 100/30 a Phoenix C24/1600 Inverter.

I am considering a BlueSolar 150/35 for a 2nd array of panels.

I use the VRM with a 4G modem for remote monitoring.

I want to replace my AGM cells with LiFePo4 cells and need to monitor the temperature, so that I dont charge them below 5 degrees C.

Can I use a BMV-712 with a separate temperature sensor, connect the BMV to the Pi and share the temperature with both the Smart- and BlueSolar MPPTS?

Or must I buy a SmartSolar MPPT???

This is what is written about the BMV/Venus OS and Temperature:

Add shared temperature sense, and a switch (default on) for the feature. At present only a single configuration is supported: a BMV-702 or 712 with the temperature sensor accessory. When such a battery monitor is connected, and temperature sense is enabled, the Venus-device will send the battery temperature to the connected Solar Chargers and Inverter/chargers.

// Patrik

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