From 287275dad22f2ae89beaceea1da6a7fd7ff4d054 Mon Sep 17 00:00:00 2001
From: Alexander Hartung <alexander.hartung@openwb.de>
Date: Mon, 7 Sep 2026 14:11:26 +0200
Subject: [PATCH] Keep small charged energy amounts

---
 packages/control/chargelog/chargelog.py      |  2 +-
 packages/control/chargelog/chargelog_test.py | 30 ++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/packages/control/chargelog/chargelog.py b/packages/control/chargelog/chargelog.py
index dcfbbfeb3d..ebcbce669f 100644
--- a/packages/control/chargelog/chargelog.py
+++ b/packages/control/chargelog/chargelog.py
@@ -369,7 +369,7 @@ def calculate_charged_energy_by_source(cp, processed_entries, reference_entries,
             raise TypeError(f"Unbekannter Referenz-Zeitpunkt {reference}")
         log.debug(f'power source {relative_energy_source}')
         log.debug(f"charged_energy {charged_energy}")
-        if charged_energy < 100:
+        if charged_energy <= 0:
             # wenn nur entladen wurde, keine Anteile berechnen
             return {source: 0 for source in ENERGY_SOURCES}
         return _get_charged_energy_by_source(
diff --git a/packages/control/chargelog/chargelog_test.py b/packages/control/chargelog/chargelog_test.py
index 3993d15ede..c9c5bb4aa8 100644
--- a/packages/control/chargelog/chargelog_test.py
+++ b/packages/control/chargelog/chargelog_test.py
@@ -166,3 +166,33 @@ def test_calc_charge_cost_reference_middle_day_change(mock_data, monkeypatch):
     assert cp.data.set.log.charged_energy_by_source == {
         'grid': 1242.8, 'pv': 385.8, 'bat': 671.4, 'cp': 0.0}
     assert round(cp.data.set.log.costs, 5) == 0.5
+
+
+def test_small_positive_charge_is_assigned_to_energy_sources(mock_data, monkeypatch):
+    cp = Chargepoint(4, None)
+    charged_energy = 80
+    cp.data.set.log.imported_since_plugged = cp.data.set.log.imported_since_mode_switch = charged_energy
+
+    # Beispielhafte Verteilung
+    processed_entries = {
+        "totals": {
+            "cp": {
+                "cp4": {
+                    "energy_imported": 1000,
+                    "bat": 250,
+                    "cp": 0,
+                    "grid": 500,
+                    "pv": 250,
+                }
+            }
+        }
+    }
+    monkeypatch.setattr(chargelog, "_get_reference_position", Mock(return_value=chargelog.ReferenceTime.START))
+
+    charged_energy_by_source = chargelog.calculate_charged_energy_by_source(
+        cp, processed_entries, []
+    )
+
+    assert charged_energy_by_source == {'bat': 20, 'cp': 0, 'grid': 40, 'pv': 20}
+
+    assert sum(charged_energy_by_source.values()) == cp.data.set.log.imported_since_mode_switch