diff --git a/solax/inverters/x1_hybrid_gen4.py b/solax/inverters/x1_hybrid_gen4.py
index ed74a9a..9a2bed7 100644
--- a/solax/inverters/x1_hybrid_gen4.py
+++ b/solax/inverters/x1_hybrid_gen4.py
@@ -49,7 +49,7 @@ def response_decoder(cls):
             "On-grid daily yield": (13, DailyTotal(Units.KWH), div10),
             "Battery voltage": (14, Units.V, div100),
             "Battery current": (15, Units.A, div100),
-            "Battery power": (16, Units.W),
+            "Battery power": (16, Units.W, to_signed),
             "Battery temperature": (17, Units.C),
             "Battery SoC": (18, Units.PERCENT),
             "Inverter Temperature": (26, Units.C),