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springfall2008 / batpred

Home battery prediction and charging automation for Home Assistant, supporting many inverter types
https://springfall2008.github.io/batpred/
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Predbat Savings sensors innaccurate #1106

Open Mikebert4 opened 1 month ago

Mikebert4 commented 1 month ago

We're moving to Octopus Agile soon, and so I've installed PredBat to help manage our Solar/Battery system - because it's absolutely awesome.

Install is a GivEnergy Gen1 Hybrid, communicating through GivTCP.

Our current Electricity rates are flat - same value 24h a day. It's pretty clear that there's not a lot for PredBat to be doing - the PV system gathers what energy it can, when the battery is full it exports, when the house load exceeds the PV generation, the battery kicks in until it's empty. Rinse and repeat. Predbat has thus been "idle" for pretty much the entire time - there's no cost benefit to holding charge, or charging the battery from the grid. All is as it should be.

However, over the last couple of days, with the creation of the savings sensors, I've noticed that these sensors are reporting savings from predbat (when in fact there's no optimisation to be done).

Predbat Plan image

Predbat cost predictions showing no change between base and optimised: image

Predbat Savings numbers (I've stacked the bar graphs - so there's a little more going on here, but the values are still the raw ones) image

springfall2008 commented 1 month ago

I've not tried a single fixed rate, maybe its trying to compare it against 24/7 charging I'll look