diff --git a/app/models/reading.rb b/app/models/reading.rb
index 978dc1c..cdf66e4 100644
--- a/app/models/reading.rb
+++ b/app/models/reading.rb
@@ -10,5 +10,25 @@ class Reading < ActiveRecord::Base
     self.total_m3_gas_consumed == reading.total_m3_gas_consumed &&
     self.high_tarif == reading.high_tarif
   end
+  
+  # reduce precision to 1 digit behind comma
+  def total_kwh_consumed_high=(kwh)
+    write_attribute(:total_kwh_consumed_high,kwh.round(1))
+  end
+
+  # reduce precision to 1 digit behind comma
+  def total_kwh_consumed_low=(kwh)
+    write_attribute(:total_kwh_consumed_low,kwh.round(1))
+  end
+
+  # reduce precision to 1 digit behind comma
+  def total_kwh_produced_high=(kwh)
+    write_attribute(:total_kwh_produced_high,kwh.round(1))
+  end
+
+  # reduce precision to 1 digit behind comma
+  def total_kwh_produced_low=(kwh)
+    write_attribute(:total_kwh_produced_low,kwh.round(1))
+  end
 
 end