Hi everyone,
I had an AIO 13.5 battery with a Gateway installed and connected to my 4kw solar panels in May. All was working fine until I had an extra 5.8kw solar panels with a Fox inverter installed and fed via my consumer unit. Since installation the AIO has started to discharge to the preset limit every six to seven days overnight in the early hours of Sat or Sun morning. The export meter shows that it hasn’t been exported to th grid and I have nothing on timer to consume the electricity. Does the AIO need recalibrating? any help would be appreciated.
Your AIO hasn’t discharged overnight as if it had then you’d have seen some export occurring.
What has happened is that your AIO has lost track of the SoC (state of charge) of its batteries. This can happen when your battery remains full or full-ish for an extended period of time, which often happens over the summer, and with increased risk with your extra solar generation. Now that you are using the battery more the AIO is realising that the SoC it thought it had, it hasn’t, and you see the SoC drop with no export or discharge power shown on the power graphs.
The fix is to firstly use all your battery range on a semi regular basis. Drain the battery down to completely empty and fill it up to full again and this helps the inverter to keep track of the SoC. The newer firmwares are better at tracking SoC, so if you can, upgrade your inverter firmware to the latest version.
If a full discharge/charge cycle doesn’t restore it then you need to do a calibration, you can initiate this yourself through the portal which does a full export right to the bottom then refill to the top to reset the batteries knowledge of what the upper and lower limits are.
Consider what time to do this because once you start it you can’t stop or pause it, so time it so you can refill on cheaper rate electricity.
Geoffrey, thank you for help I will give it a go on the next sunny day.
If you have generation connected to the main consumer unit, this energy passes the Load CT, which expect to see load energy to be counted.
Instead your passing generation.
What you need is another PV meter on this Fox String inverter ID3, wired back to teh existing ID2 in the GW already.
Now teh GW is aware of 2 generation sources and will add them together to make PV yellow curve on the graph and add their energy together.
That fixes the PV not showing from this souce.
Now the energy is still passing the Load CT
But now this is measures it can work out which is PV and which is Load
Enable Calculated Load, will then show load as load.
Thank you for your help, I already have a separate meter but will investigate your suggestion on the wiring.
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