I have not changed any settings
It dark at the moment.
Batteries currently around 80% and the house running off them.
I notice there is some export to the grid going on.
I’m typing this on my iPad and looking at the app on my phone.
We also have the solar iboost for the hot water and it shows zero for today.
So how is the system exporting before going via the iboost? Or is it?
Is there anything I need to check?
you say some export, but how much is some? Is it constantly exporting, the battery definitely discharging, you’ve not got a high load appliance on like the cooker and then turned it off?
are you looking at home or away mode on the phone? If looking at away mode then it shows a snapshot every 5 minutes so the information you see could well be out of date
otherwise if it persists, I would go through and reprogram any charge and discharge activity, making sure you change them to a value, then change back to what you want to ensure the change gets recognised
Thanks Geoffrey. I was looking at it in Away mode although did not have any heavy load appliances etc on.
I am looking at my phone app in Home mode and with 75% on the batteries,the house currently using 632w, batteries are supplying that and exporting 76w to the grid. It’s dark so no solar.
A short time ago there was about a hyndred or so watts coming in from the grid to the house despite the batteries having ample to supply the usage.
Maybe I’m overthinking all this?
Everything seems to be working ok so I was just trying to get a better understanding.
There is always going to be some delay between your house load changing and the inverter instructing the battery and then the battery responding to that load. When house load goes up there will be a lag with a bit of grid import occurring until the inverter ramps up, and then when the house load drops off there will be a reverse lag with a bit of grid import until the inverter and then the battery stop discharging.
You don’t mention what inverter type or firmware you are on, but the older inverters and older firmware are slower to respond to changing house load, as is the AC3 EMS as it has to instruct the underlying AC3’s so that adds a further delay.
Its not helped by the GivEnergy app which in home mode will refresh every 10 seconds and in away mode every 5 minutes, so what you are looking at is always out of date.
Here’s a snapshot of grid power for me, I have Gen 1 hybrid inverters with the “fast response” firmware, so they’re faster than the original firmware but probably not as good as the Gen 3’s.
This is captured with GivTCP in Home Assistant and polled every 30 seconds and generally its only small changes either side of zero, but as you can see its moving all the time.
And if I overlay the battery power on top (yellow and red) you can see the context of what the inverters are dealing with
I would look at your energy bill. If its excessive peaks when the battery is supposed to be covering house load then look further, otherwise I think its all OK
My batteries do the same but I’m. sure it’s a very small amount while they’re balancing themselves out.
Ok so similar question in reverse perhaps - yesterday I had 2 full batteries - and I was using my oven, air frier, and other stuff (batch cooking) - and the Givenergy app on my phone showed the house using 5.41kwh - yet some of this was coming from the grid. The rest from the batteries.
Is it the case that where there is heavy demand, the batteries cannot keep up so it takes from the grid?
in short, yes. Depends what inverter you have as that is usually the limiting factor. The AC3 AC inverter can charge/discharge at 3kWh, the Gen 1 hybrids at 2.6kWh, the Gen 2 and 3 hybrids at 3.6kWh. The AIO is 12kWh.
Probably best to time such batch cooking for outside any peak rate electricity tariff you are on
Thank Geoffrey.
