From d1aa17c05a255ac96f063be97c56e460da3f9716 Mon Sep 17 00:00:00 2001
From: Joerg <joerg@dj7nt.de>
Date: Sat, 10 Oct 2026 17:51:48 +0200
Subject: [PATCH] Show battery power as positive when discharging

The battery register reads negative on discharge (raw since day
one), but the tile label promised '+ Entladen / - Laden'. Flip the
three raw battery1_power/current queries with * -1 so positive
means power flowing into the house - the same mental model as the
grid tile (+ Bezug). Full history renders consistently; surplus
panels already use the correctly-signed derived fields.
---
 grafana_dashboard.json | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/grafana_dashboard.json b/grafana_dashboard.json
index 7373ae6..a93413b 100644
--- a/grafana_dashboard.json
+++ b/grafana_dashboard.json
@@ -156,7 +156,7 @@
             "type": "influxdb",
             "uid": "${DS_INFLUXDB}"
           },
-          "query": "SELECT last(\"battery1_power\") AS \"Battery\" FROM \"$measurement\" WHERE serialnumber =~ /^$serial$/ AND $timeFilter",
+          "query": "SELECT last(\"battery1_power\") * -1 AS \"Battery\" FROM \"$measurement\" WHERE serialnumber =~ /^$serial$/ AND $timeFilter",
           "refId": "A",
           "rawQuery": true,
           "resultFormat": "time_series"
@@ -828,7 +828,7 @@
             "type": "influxdb",
             "uid": "${DS_INFLUXDB}"
           },
-          "query": "SELECT mean(\"battery1_power\") AS \"Batterie (+Entladen/-Laden)\" FROM \"$measurement\" WHERE serialnumber =~ /^$serial$/ AND $timeFilter GROUP BY time($__interval) fill(null)",
+          "query": "SELECT mean(\"battery1_power\") * -1 AS \"Batterie (+Entladen/-Laden)\" FROM \"$measurement\" WHERE serialnumber =~ /^$serial$/ AND $timeFilter GROUP BY time($__interval) fill(null)",
           "refId": "C",
           "rawQuery": true,
           "resultFormat": "time_series"
@@ -2110,7 +2110,7 @@
             "type": "influxdb",
             "uid": "${DS_INFLUXDB}"
           },
-          "query": "SELECT mean(\"battery1_current\") AS \"Batteriestrom\" FROM \"$measurement\" WHERE serialnumber =~ /^$serial$/ AND $timeFilter GROUP BY time($__interval) fill(null)",
+          "query": "SELECT mean(\"battery1_current\") * -1 AS \"Batteriestrom\" FROM \"$measurement\" WHERE serialnumber =~ /^$serial$/ AND $timeFilter GROUP BY time($__interval) fill(null)",
           "refId": "A",
           "rawQuery": true,
           "resultFormat": "time_series"