From 28fc4b65b862ce6b043e6dcb8d7ee6877634692a Mon Sep 17 00:00:00 2001
From: mfuchs1984 <57141790+mfuchs1984@users.noreply.github.com>
Date: Thu, 1 May 2025 11:29:49 +0200
Subject: [PATCH] Loadpoint: improve battery boost coarse current step-up
 (#20969)

---
 core/loadpoint.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/core/loadpoint.go b/core/loadpoint.go
index 80f0cf8b2..8da6bd78c 100644
--- a/core/loadpoint.go
+++ b/core/loadpoint.go
@@ -1332,7 +1332,11 @@ func (lp *Loadpoint) boostPower(batteryBoostPower float64) float64 {
 	delta := math.Max(100, math.Abs(lp.site.GetResidualPower()))
 
 	if lp.coarseCurrent() {
-		delta = math.Max(delta, lp.EffectiveStepPower())
+		// add effective step power to delta to make sure to step up to the next full amp
+		// just using lp.EffectiveStepPower() as delta is not enough because this will result
+		// in a too low current when there is a bit remaining grid consumption due to the accuracy
+		// of the battery controller
+		delta += lp.EffectiveStepPower()
 	}
 
 	// start boosting by setting maximum power