diff --git a/meter/sma.go b/meter/sma.go
index 2298fa728..05dd8f21a 100644
--- a/meter/sma.go
+++ b/meter/sma.go
@@ -109,6 +109,9 @@ var _ api.MeterEnergy = (*SMA)(nil)
 // TotalEnergy implements the api.MeterEnergy interface
 func (sm *SMA) TotalEnergy() (float64, error) {
 	values, err := sm.device.Values()
+	if sm.scale < 0 {
+		return sma.AsFloat(values[sunny.ActiveEnergyMinus]) / 3600000, err
+	}
 	return sma.AsFloat(values[sunny.ActiveEnergyPlus]) / 3600000, err
 }
 
@@ -130,7 +133,7 @@ func (sm *SMA) Currents() (float64, float64, float64, error) {
 		res[i] = util.SignFromPower(sma.AsFloat(values[id]), powers[i])
 	}
 
-	return res[0], res[1], res[2], err
+	return sm.scale * res[0], sm.scale * res[1], sm.scale * res[2], err
 }
 
 var _ api.PhaseVoltages = (*SMA)(nil)
@@ -161,7 +164,7 @@ func (sm *SMA) Powers() (float64, float64, float64, error) {
 		res[i] -= sma.AsFloat(values[id])
 	}
 
-	return res[0], res[1], res[2], err
+	return sm.scale * res[0], sm.scale * res[1], sm.scale * res[2], err
 }
 
 // soc implements the api.Battery interface