question

Wayne avatar image
Wayne asked

DC consumption data missing on VRM

A client of mine is running 600Ah Relion LiFeP04, Cerbo GX - touch 50, EasySolar 12/1600-70 16, 2 x 100/50MPPT, 2000W PV, and has recently swapped out a BMV712 for a Lynx Shunt VE-Can.

The overview graph and overview were perfect with the BMV, however with the Lynx the AC consumption is being captured but the DC is not, we have checked all the settings several times, even reconnected the BMV, perfect, then the Lynx same issue, the DC consumption is showing in the "to battery" and not in the "direct use".

The data in the 1st image is perfect, but we lose the DC consumption in conversion to the graph.

Any help appreciated


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VRM
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6 comments
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snoobler avatar image snoobler commented ·
I'm sorry I have nothing to contribute to your problem, but I am curious how you are gathering and reporting the additional three temperatures (Hot Water, Ext Temp and Fridge).
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ofernander avatar image ofernander snoobler commented ·
The CerboGX had the ability to utilize 4 separate temperature probes. My guess is this is how they are doing it.
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Wayne avatar image Wayne snoobler commented ·

@snoobler @ofernander both myself and this customer use a Victron temp sensor - AS000001000 to monitor the hot water, the sensor is connected to a Cerbo through one of the 4 temp sensor inputs,

The other temps are via Ruuvi BlueTooth sensors, this is new functionality in Firmware 2.80 and configured through Settings - I/O - Bluetooth Sensors

Cheers

Wayne


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snoobler avatar image snoobler Wayne commented ·
Thanks! I think I'm limited to one on the CCCGX. I hadn't seen that before. Looks like I'll be upgrading to the Cerbo in the future. :)
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Wayne avatar image Wayne snoobler commented ·

@snoobler you certainly get so much more functionality with the Cerrbo, I have the Touch 50 display in the Motorhome, but do most of my monitoring via VRM.

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snoobler avatar image snoobler Wayne commented ·

Same for me on monitoring... I'll just have a couple of extra temps I want to monitor once my system is complete, so future Cerbo. :)

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1 Answer
mvader (Victron Energy) avatar image
mvader (Victron Energy) answered ·

Hi @Wayne that sounds like a nice install!

I have to disappoint you for the DC consumption I’m afraid. Those kWh graphs don’t take any DC consumption into account.

Its specified in more detail here. If I remember correctly, it was impossible to make then reasonably reliable. The input data (multi dc current minus lynx dc current) is already unreliable.

Perhaps it can be improved now that we have more accurate DC system monitoring (see DC energy meter in v2.80). But thats really something I cannot promise any timeline on.

Have a good weekend, Matthijs

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Wayne avatar image Wayne commented ·
Hi @mvader (Victron Energy) thanks very much for taking the time to have a look.

Its interesting as prior to installing the Linx shunt, the Kw bar graphs and solar overview pie graphs were perfect with a BMV712.

We will have a play adding a smart shunt as an energy meter using the new 2.80 functionality.

You too re the weekend.

Cheers

Wayne


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