Weird issues with Huawei FusionSolar app

BossBob

That is a lot of yield to lose. On days in the middle of winter I haven’t generated that much so I’m sure I’d notice it.
I’d hope that the system shouldn’t use much more than a wall wart to run itself. You can contact Huawei on [email address removed by Forum Team]. You’ll have to give them your inverter serial number so they can confirm model.

Magnitio

tallac said:

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?

Yes. The highest I have had is about 2.5kWh on days of significant activity e.g. lot of solar generation or major charge/discharge sessions.

BossBob

I’ll make a note of yield at the end of generation tonight and see what it drops to in the morning and let you know.

EcoScruples

All these things used to bug me but I've just accepted it as part of the app now.
My biggest difference in what's on the app and what's used is import from grid.
Sometimes it misses significant stuff like showers completely leading to a lower figure on the app to what's on the smart meter.

My generation normally drops about 0.5kw at the end of the day.

Ultimately I can live with it, not a big enough issue to make me chase resolutions.

BossBob

22.67 kWh yield at 21:27 this evening.

EcoScruples

Here’s mine tonight, I’ll post the same in the morning

BossBob

BossBob said:

22.67 kWh yield at 21:27 this evening.

And 22.52 kWh shown this morning, so that will be to midnight as the app runs midnight to midnight. 0.15 for about 2.5 hours which doesn’t convert to 2.5 kWh over 24 hours.
On the amount shown fed to grid, that is down to speed of reaction of the inverter and grid to demand in the system. You don’t want a brown out or supply drop and the system juggles supply to maintain supply.
Then you have the data granularity. What you see in the app is a snapshot that is taken and reported every 5 minutes. If the grid is supplying at that moment it will apparently continue for 5 minutes even if your IHD only shows that the grid supplied for 10 seconds. The same will be true of feed from the PV system to the grid. The shortest time it can show on the app is 5 minutes even though switching time is much shorter.

If you want better you’ll need more clamp sensors on supplies from grid and PV and your own local equipment and app to monitor it rather than depending on Huawei’s web based system where you are granted access to your data.

Magnitio

From previous tests and calculations I worked out that the inverter and BMS were using between 40 and 60 Watts. This equates to about 1 to 1.5kWh per day. Additional energy is lost in the AC to DC to AC conversion, so on days when there is a lot of activity, this figure will be higher. I did try to find out from people with other hybrid inverters what their systems consume, but didn't get anywhere.

Feedback from most Huawei owners on another forum seems to be very positive, with the hardware reacting very quickly to changes in load and PV generation. The main issues are installations not performed correctly (which is not really Huawei's fault), the app (which is slowly improving) and some of the firmware releases have unexpected consequences.

BossBob

1.5kWh per day seems about right and if you convert more DC to AC losses will be proportional.
The equipment seems to work well enough and my IHD seems to show that the PV and battery are reacting well and taking over supply when load is applied. The Octopus Watch and the app are agreeing to about 0.05kWh per day on the import/export figures for my installation.

Benrb7

Came across this post as I have the Huawei battery, well 2x5kwh modules with 5kw inverter.

Been working great and saving as predicted last few weeks generation exported is covering the gas and electric.

Been limiting charge to 10%/90% to help reduce wear and prolong overall life.