I recently added a GivEnergy Hybrid inverter + 9.5kwH battery + solar recently (Jan 2025) to a separate existing Solar PV system on FiT (from 2014).
Prior to Feb 28th, this App view seemed believable:
However, since that day some parts seem to have flipped, therefore giving strange negative values:
Tom from GivEnergy tweaked some things remotely yesterday (6/3), but nothing seems to have changed
Any ideas?
Thanks,
Chris.
have you upgraded/changed anything around this time?
Apart from the graphs being screwed up, is the system performing correctly, i.e. the battery charges from solar and then discharges during the evening with home demand?
Anything in the inverter notification log in the portal?
If the system is not performing, e.g. the battery never charges up, it exports all solar, then this points to either a CT clamp being the wrong way round or the CT clamp configuration in the inverter being inverted
If its working then it sounds like a givenergy graph display problem. Hard to know what might be causing that
Thanks for the response.
Overall I think it is behaving as expected, although I’m still getting my head around the controls in the web UI. The lack of documentation doesn’t help.
I’ve not knowingly changed anything that might lead to the issue.
I wondered if the presence of the original solar PV just confuses the overall system. We have had more sun since 28/2 and I’ve noticed in the bar chart view that it starts the day with positive numbers and then it all flips after a few hours.
I’ll keep reporting the issue and see what they suggest.
Ah, I have just re-read your system description. You have an older FIT array with its own inverter, then a new hybrid inverter with new solar panels and batteries?
If so, then yes, this is the way it works. The app knows nothing about your FIT array generation and so when it sees export (from the FIT array) that it doesn’t know about it starts assuming its negative house load and negative solar to make the numbers add up.
I have two givenergy hybrid inverters and a FIT array and have the same problem, the app and portal graphs are useless in the summer.
This was the initial driver for me getting Home Assistant so I could monitor the different parts properly
100% the same for me as well, 2 Arrays ( 1 FITs ) and HomeAssistant used to monitor the overall load and usage in the house.
Thanks again.
I have no monitoring of the old system, apart from a generation meter that I report for the FiT payments. So my home assistant potential may be limited.
Home Assistant is a bit of a jump forward, it does open up controlling your inverter an battery in smarter way, charging enough overnight to meet next day’s demand, etc.
For the FIT generation I got a Shelly EM energy monitor which has two CT clamps, put one round my FIT output cable and another round my ASHP input. The Shelly sends real-time power and energy information into Home Assistant so I can see combined energy graphs, e.g.
In the solar generation you can see both of my GivEnergy arrays and the FIT array
