Hello everyone.
I’m getting overwhelmed by all the information about ESS, DESS, trade, green mode and such. My current setup is: Fronius Primo 6, updated to last firmware, grid connected. ET112 just after the energy company grid meter, configured as grid meter in the VenusOS. Grid is connected to AC-IN on the Multiplus, so both grid and Fronius can power the Multi.
Before to connect the Multi to the grid, i used it as “off-grid” system, mainly based on solar MPPTs, but i was able with some assistants to ignore AC-IN, but also to use the grid as “generator”. It was configured to enable AC-IN, sustain the load and charge with 1A the battery. If relay 2 was closed, charge would be set to 50A. I still was able to choose the charge power by controlling the AC-IN limit with the grid current limit on the VRM. Also generator autostart was set to start under 15 and stop over 20. Now, the Fronius kicks into the “story”. I have 5.2KWp on the Fronius side that feeds into the grid. I don’t want to limit it in any way, i just want that my Multi uses the excess energy from the Fronius to charge my battery and absolutely i don’t want to get power from the grid to charge it. I just don’t get where in the ESS i can set this. I played around with set grid point, excess pv feed in etc etc. The only way i can some results, it to use the button “Star generator” in the VRM. And of course it don’t respect my settings and takes energy from the grid. (To test this, i have limited the Fronius production from it’s datamanager dashboard). So, before to reset everything and start from zero i’m open to suggestion. Probably i’m missing a little point but it’s days i’m hitting my head against the wall. Now that i write this i got an idea. Should i use/set Scheduled charge level? Set it to 100 from morning to evening and accordingly set gridsetpoint to zero?
Thanks in advance,
Deunan.
That should just work out of the box with ESS, at least it did for me. Do you see the Fronius in VenusOS, and what is your ESS mode set to? Should be one of the two “Optimized” options…
Today i had much better results.
I confirm you i’m using Optimized without battery life. I recheked all the Fronius settings, e changed a couple in the ESS, copied from a friend who use it in almost same way. What i changed is Multiphase regulation and set to individual phase. Minimum soc 20%, Grid setpoint -10W. But i had to start manually the generator. I was out of home, so i don’t know the sun situation since we had clouds, but i have seen the multi and fronius going togheter, with some pull from the grid, 50 to 100W. Manual start generator is a requisite? at least one time to start the ESS process?
I don’t even have a generator, and my system just worked like I expected from the start, once I had both meters (grid and PV) integrated.
My approach would be (and please note I’m just an end user with experience with a single system):
- make sure you see grid and PV meter readings in remote console, and that they match reality; no sense in changing anything else if that is not working
- wait a bit, depending on how fast things change (loads and clouds and stuff) it can take a minute for the system to stabilize at around your grid setpoint.
If that doesn’t help, maybe do a factory reset of everything and start from scratch, following the ESS documentation?