From 184065152e1153dba75df9dfa2d1b438d6d6079b Mon Sep 17 00:00:00 2001
From: Andreas Linde <42185+DerAndereAndi@users.noreply.github.com>
Date: Sat, 25 Dec 2021 19:25:25 +0100
Subject: [PATCH] Ignore negative PV power for homePower (#2117)

Positive power means it is an energy source, negative power means it is a consumer. When calculating homePower only energy sources may be considered, hence negative PV power needs to be ignored
---
 core/site.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/site.go b/core/site.go
index 487e35fcd..1223a9e9e 100644
--- a/core/site.go
+++ b/core/site.go
@@ -404,7 +404,8 @@ func (site *Site) update(lp Updater) {
 	if sitePower, err := site.sitePower(); err == nil {
 		lp.Update(sitePower, cheap, site.batteryBuffered)
 
-		homePower := site.gridPower + site.pvPower + site.batteryPower
+		// ignore negative pvPower values as that means it is not an energy source but consumption
+		homePower := site.gridPower + math.Max(0, site.pvPower) + site.batteryPower
 		for _, lp := range site.loadpoints {
 			homePower -= lp.GetChargePower()
 		}