From f0507a88a62992685d2b4df837f510afac7149fb Mon Sep 17 00:00:00 2001
From: Paul Bottein <paul.bottein@gmail.com>
Date: Wed, 5 Feb 2025 10:18:29 +0100
Subject: [PATCH] Fix statistic chart tooltip values (#24074)

---
 src/components/chart/statistics-chart.ts | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/src/components/chart/statistics-chart.ts b/src/components/chart/statistics-chart.ts
index f6a03bd9c8..9b8246bc05 100644
--- a/src/components/chart/statistics-chart.ts
+++ b/src/components/chart/statistics-chart.ts
@@ -198,15 +198,18 @@ export class StatisticsChart extends LitElement {
         const statisticId = this._statisticIds[param.seriesIndex];
         const stateObj = this.hass.states[statisticId];
         const entry = this.hass.entities[statisticId];
-        const stateValue = String(param.value[1]);
+        // max series can have 3 values, as the second value is the max-min to form a band
+        const rawValue = String(param.value[2] ?? param.value[1]);
 
-        const value = stateObj
-          ? this.hass.formatEntityState(stateObj, stateValue)
-          : `${formatNumber(
-              stateValue,
-              this.hass.locale,
-              getNumberFormatOptions(undefined, entry)
-            )}${unit}`;
+        const options = getNumberFormatOptions(stateObj, entry) ?? {
+          maximumFractionDigits: 2,
+        };
+
+        const value = `${formatNumber(
+          rawValue,
+          this.hass.locale,
+          options
+        )}${unit}`;
 
         const time =
           index === 0