Is a ₹25,000 electricity bill common in Kerala?

I live in Kochi with my parents. Our electricity bill is usually around ₹10,000 to ₹15,000, but there have been times when it went up to ₹25,000. By the way, most of the time we are out and are home only at night and for a few hours in the morning. Is this the average electricity bill in Kerala?