From c67fa1d3b9d88de83e99400713737212f6fb9adc Mon Sep 17 00:00:00 2001
From: Flora <flora.hofmann@frequenz.com>
Date: Tue, 1 Oct 2024 13:43:00 +0200
Subject: [PATCH] Change zero to nan for lack of data

Signed-off-by: Flora <flora.hofmann@frequenz.com>
---
 RELEASE_NOTES.md                     | 2 +-
 src/frequenz/reporting/_reporting.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 1471b48..a144d93 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -14,4 +14,4 @@
 
 ## Bug Fixes
 
-<!-- Here goes notable bug fixes that are worth a special mention or explanation -->
+* Change 0.0 to nan if there is no data available
diff --git a/src/frequenz/reporting/_reporting.py b/src/frequenz/reporting/_reporting.py
index 1948957..b960733 100644
--- a/src/frequenz/reporting/_reporting.py
+++ b/src/frequenz/reporting/_reporting.py
@@ -114,7 +114,7 @@ async def cumulative_energy(
                 elif last_value_diff < 0:
                     production += last_value_diff
     else:
-        consumption = production = 0.0
+        consumption = production = float("nan")
 
     return CumulativeEnergy(
         start_time=start_time,