Usage amount impact on Smart Charge calculation?

alunmw

One of the things we have to set is our estimated daily usage. It would be good to know how altering this affects the amount Wonder Watt will charge by. This morning, the first day I've used Wonder Watt, you predicted I'd generate around 5.4 kWh, but the actual amount generated was almost three times as high at 14.7kWh. As a result I ended up importing 3kWh from the grid and then exporting them again later in the day.
I'm wondering if lowering my estimated usage from say 10kWh to 5kWh will cause Wonder Watt to aim for a lower charge level.
It's early days yet, and I'm certainly willing to see how thing go for a few more days, as it's better to import more cheap electricity than I need than not enough, but if the forecast is consistently on the low side then I should probably change something.

SilverArt

alunmw Have a look at [https://community.wonderwatt.com/d/7-how-is-the-solar-forecast-calculated/21](https://) and [https://community.wonderwatt.com/d/28-feature-request-combine-two-solar-predictions/3](https://)

It's never going to be an exact science, sat at my desk yesterday it was cloudy here with low solar, looking out the window there was bright blue sky to the North and when I went out it was chucking it down half a mile away to the East!

Part of the answer to your question will depend on the size of your battery compared to your typical house usage. In my case by telling WW that I have twice the kWp has improved 'performance' no end but it will need a bit longer to be certain.

admin

alunmw This will be fixed today: https://community.wonderwatt.com/d/33-solar-calculation-fix-to-be-rolled-out-16-october

Apologies for the inconvenience!

alunmw

I'm still interested to know how/whether the daily usage figure influences the amount to charge by. As the weather gets colder my usage is going to increase quite a lot since my heating is now by heat pump, and usage will fluctuate quite a lot depending on the outside temperature.

admin

alunmw Hi, yes, daily usage is taken into account for the calculation.

Fair point about colder weather and heat pump, we've been thinking about adding forecasted temperature in and expose that as some sort of conditional as well as the currently predicted solar kWh yield.

So much to do, so little time!

Gazzagreen

admin So much to do, so little time!

LOL the more complicated you make it, the harder it becomes....

admin

Gazzagreen Ain't that the truth! 🤯