Weird issues with Huawei FusionSolar app

tallac

I have 2kW peak of solar panels with a Huawei inverter and home storage battery. I've got Huawei FusionSolar app on my Android phone but I've noticed that the stats for Yield seem off (other stats might be off too but this is the one I've noticed).

For example, a few days ago I had this yield graph that the app said gave me 9.78kWh



And then today I have this which gave me 9.57kWh:


It's clear to see that the area under the curve are vastly different but the total yield generation are nearly the same. That isn't right at all.

Any ideas what's going on? Have other people see these discrepencies before?

BossBob

I’ve not seen anything like that on my data and do look most days. Have you looked at the same data in the web version of the app or even asked for help from Huawei. You can also ask for 5 minute raw data from the inverter by either contacting your installer or putting in a request to Huawei. You can also get developer access to 1 minute interval data but you have to be able to know how to interpret this.

Magnitio

The yield shown on the Huawei app takes into account the energy used to power the inverter and battery during the day, so you may notice that the yield will actually reduce after sunset. When you look at today's yield tomorrow, it is likely to be lower. What size inverter and batteries do you have?

BossBob

I’d noticed that the yield dropped after the panels had stopped generating and doesn’t show for a while after the panels start generating in the morning so that gives me a reason for that so thanks for that!

tallac

Magnitio said:

The yield shown on the Huawei app takes into account the energy used to power the inverter and battery during the day, so you may notice that the yield will actually reduce after sunset. When you look at today's yield tomorrow, it is likely to be lower. What size inverter and batteries do you have?

I see. I'll look at the yield for today tomorrow when it's recalculated. I've got the 5kW inverter with 15kWh battery.

BossBob said:

I’ve not seen anything like that on my data and do look most days. Have you looked at the same data in the web version of the app or even asked for help from Huawei. You can also ask for 5 minute raw data from the inverter by either contacting your installer or putting in a request to Huawei. You can also get developer access to 1 minute interval data but you have to be able to know how to interpret this.

Not sure I have the time or the desire to do something with the raw data. On the whole, I'm quite happy looking at the graphs the app shows (I just wish it didn't have the inconsistent stats).

I have noticed other weirdness with the app as well. Numbers are just for illustration but it'll show something like 1kW generation from the PV going all into the battery but the house might be using 0.5kW but this is being supplied by the grid at 0.5kW. From what I can tell, I don't think the system is actually doing this, I think it's just a momentary glitch in the app that resolves itself after a few minutes.

Another example of app weirdness is on this day, this is a few months back but graph shows there's clearly some generation but the Yield stat at the top shows 0.00.

BossBob

You can’t compare 5 minute snapshots (the app) with say the display on your in home display which can update at 10 second intervals. I’ve boiled the kettle and the app hasn’t even noticed it and I’ve done the same and the consumption sits there for 5 minutes. You are paid or pay based on the meter not the app.
As for the discrepancy in production and yield, I haven’t seen anything as gross as yours and suggest again that you reach out to Huawei.

Magnitio

tallac said:

I have noticed other weirdness with the app as well. Numbers are just for illustration but it'll show something like 1kW generation from the PV going all into the battery but the house might be using 0.5kW but this is being supplied by the grid at 0.5kW. From what I can tell, I don't think the system is actually doing this, I think it's just a momentary glitch in the app that resolves itself after a few minutes.

The app does sometimes report odd numbers for the "live" output. The hardware reports the live data every 5 minutes and it will on the odd occassion show something that doesn't make sense. I don't know whether this is because it is taking the readings at a time when something is changing significantly e.g. house load or solar output. The app has improved a lot in the 18 months since I have been using it, but there are still some issues that could be addressed.

I mentioned above about yield reducing due to the power required by the inverter and the battery. On my setup, this equates to between 1 and 1.5kWh per day. This is quite noticeable during the winter and will be quite significant for a 2kWp of solar.

If you use Facebook, you might find this user group of interest: https://www.facebook.com/groups/469094214903015/

BossBob

The Huawei system reports the numbers to the app at 5 minute intervals but the hardware can be polled at 1 minute intervals by software. You’ll need to store the data.

tallac

I looked at yesterday's data again and the 9.57kWh yield is now showing as 5.49kWh. That's a difference of about 4kWh which feels like a lot.

BossBob said:

I haven’t seen anything as gross as yours and suggest again that you reach out to Huawei.

What's the best way to get in touch with Huawei about these kind of issues?

Magnitio

tallac said:

I looked at yesterday's data again and the 9.57kWh yield is now showing as 5.49kWh. That's a difference of about 4kWh which feels like a lot.

BossBob said:

I haven’t seen anything as gross as yours and suggest again that you reach out to Huawei.

What's the best way to get in touch with Huawei about these kind of issues?

You can try contacting them through the app or uk_inverter_support@huawei.com

tallac

Magnitio said:

I mentioned above about yield reducing due to the power required by the inverter and the battery. On my setup, this equates to between 1 and 1.5kWh per day. This is quite noticeable during the winter and will be quite significant for a 2kWp of solar.

If you use Facebook, you might find this user group of interest: https://www.facebook.com/groups/469094214903015/

Seems like the yield dropped by about 4kWh from yesterday's generation. That seems like a lot, no?