diff --git a/app/models/entsoe.rb b/app/models/entsoe.rb
index 394b03a..7d9f3b5 100644
--- a/app/models/entsoe.rb
+++ b/app/models/entsoe.rb
@@ -40,15 +40,23 @@ class Entsoe
   
   def high_low_hours(date)
     sorted_prices = prices_at(date).to_a.sort_by(&:last) # sort according to price 
-    lowest_hour = sorted_prices.first[0]
     highest_hour = sorted_prices.last[0] 
-    # calculate hours where rate > charge_rate + storage_cost (typically 0.05)
-    charge_rate = sorted_prices.first[1] # assume we charge at lowest hour
-    high_hours = sorted_prices.select{|p| p[1] > charge_rate + storage_cost}.to_h.keys
     
-    # reset lowest_hour (effectively not charging), when price difference smaller than storage_cost
-    highest_price  = sorted_prices.last[1]
-    lowest_hour = "" if (highest_price-charge_rate) < storage_cost
+    # From Apr-Oct: do not charge; every hour that has cost > charge_rate is a high_hour
+    if [4,5,6,7,8,9,10].include?(date.month)
+      lowest_hour = "" # effectively no charging from grid
+      high_hours = sorted_prices.select{|p| p[1] > storage_cost}
+    else      
+      lowest_hour = sorted_prices.first[0]
+      
+      # calculate hours where rate > charge_rate + storage_cost (typically 0.05)
+      charge_rate = sorted_prices.first[1] # assume we charge at lowest hour
+      high_hours = sorted_prices.select{|p| p[1] > charge_rate + storage_cost}.to_h.keys
+      
+      # reset lowest_hour (effectively not charging), when price difference smaller than storage_cost
+      highest_price  = sorted_prices.last[1]
+      lowest_hour = "" if (highest_price-charge_rate) < storage_cost
+    end
     
     return lowest_hour,highest_hour,high_hours
   end