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Offset available power by dc-generated battery charge #2735

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merged 5 commits into from
Mar 17, 2022
Merged

Offset available power by dc-generated battery charge #2735

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2a04d53
Offset available power by dc-generated battery charge
andig Feb 28, 2022
8fd1d25
Add comment
andig Feb 28, 2022
2e0cb8b
chore: housekeeping
andig Feb 28, 2022
eaef6ca
Update helper.go
andig Mar 4, 2022
0a92bd8
Allow up to 50W delta between grid and battery meters
andig Mar 17, 2022
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12 changes: 7 additions & 5 deletions core/helper.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,13 +23,15 @@ func powerToCurrent(power float64, phases int) float64 {
return power / (float64(phases) * Voltage)
}

// consumedPower estimates how much power the charger might have consumed given it was the only load
// func consumedPower(pv, battery, grid float64) float64 {
// return math.Abs(pv) + battery + grid
// }

// sitePower returns the available delta power that the charger might additionally consume
// negative value: available power (grid export), positive value: grid import
func sitePower(grid, battery, residual float64) float64 {
// For hybrid inverters, battery can be charged from DC power in excess of
// inverter AC rating. This must be offset by the grid consumption when calculating
// available site power.
// (https://github.com/evcc-io/evcc/issues/2734)
if grid > 0 && battery < 0 && grid-battery > 50 {
battery = 0
}
return grid + battery + residual
}