Mine is not working still - on the beta vrm I don’t see any solar forecast any more. My MPPT never goes off, is that the issue?
Hi, I noticed you turned off the solar forecast legend item. I switched it on and it works again. 
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Wow thanks, I’m always learning something new about the system! 
My PV is directly fed into my AC and is not directly measured. Does that mean I cannot get a solar forecast?
My understanding is that, for AC coupled PV, you either need to have a current transformer/sensor fitted, wired into your multi and with the current sensor assistant running, or you need to have a Fronius inverter with comms to your GX.
I don’t see any other way your system could know how much your PV is generating. Even if your PV was on the output side of a multi, you still need some kind of sensor as otherwise you can’t discern PV output from AC loads.
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Thank you for your reply Matthew.
I have a fairly standard setup from 14 years ago - 4kW solar plus SMA Sunny Boy inverter.
I have no free bays in the Consumer Unit to fit an Energy Meter like ET112. I could fit a standard bobbin type CT though.
I cannot see where this would be connected/read by the Cerbo GX.
I am at an early stage in my DESS implementation - new battery unit (Seplos/EVE) installed on Tuesday and running DESS.
I probably need to do a bit more research and then open another thread to seek help.
For non-Fronius inverters there are a couple of options, e.g. via MQTT: GitHub - mr-manuel/venus-os_dbus-mqtt-pv: This Venus OS driver gets the data from MQTT and displays it as pv inverter.
Especially for Hoymiles inverters in combination with OpenDTU or AhoyDTU, there is a very nice plugin: GitHub - henne49/dbus-opendtu: Integrate opendtu and ahoy into Victron Energies Venus OS as a pv inverter
There is Solar forecast now, but its forecasting almost 10x too much.
Before the bug it was predicting quite accurate
Forecast is working and accurate for me since the bugfix. Maybe this is something specific to your installation? It might be worth starting a new thread and including as much information as possible about your setup.
Hello Tony, i have an AC in fed system with a Growatt inverter. I use home Assistant and MQTT to get the PV generation into Victron but i do see a forecast. I can let you have more detail on the packages i use if you need it… But it is possible. Eric
HI Eric, Thank you for your response. I would be very pleased to hear more about how you have managed to achieve success. I did set up Home Assistant on a Pi but haven’t really used it as DESS moved from Node Red into the main Victron options. I am fairly new to all of this though.
Home assistant is great, but take a while to get up to speed with it (I’m still working at it )
The way I would suggest going about this is:
- Take a look at the SMA integration for home assistant, listed here https://www.home-assistant.io/integrations/sma/
If you can get the data from your inverter into Home Assistant then you’re almost there. If the integration does not work then a current clamp might be the best bet.
Then I used MQTT via the mr_manual integration to get the data from the Home Assistant into Victron. (as mentioned by HansDampf higher up in this thread.
Good luck, and if you need some more help please PM me .
Thx for the info Eric. Unfortunately the integration links through Webconnect, which cannot be fitted to my SMA 4000-TL20 model. It will fit the newer TL21. The only measurement I can make is with a clamp type CT.
I cannot see a way of sending a PM.
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