diff --git a/smartwatts/handler.py b/smartwatts/handler.py
index 9aa43b1..7a4a142 100644
--- a/smartwatts/handler.py
+++ b/smartwatts/handler.py
@@ -131,7 +131,8 @@ def _gen_formula_report(self, timestamp: datetime, pkg_frequency: float, model:
             'samples': len(model.history),
             'id': model.id,
             'error': error,
-            'intercept': model.model.intercept_
+            'intercept': model.model.intercept_,
+            'coef': str(model.model.coef_)
         }
         return FormulaReport(timestamp, self.state.sensor, model.hash, metadata)