Yes, I assume it's more expensive. Gas is cheaper than electricity in Poland, but then again, electricity also isn't that expensive for preboiling in a kettle to make a big difference.
On a related note, I was surprised when I did calculations on how much it actually costs us to bake our own bread. We started doing that a lot during this pandemic. It turns out, the cost of ingredients + electricity adds to slightly less than what it would cost to buy the same products from a bakery. This doesn't price in time spent on preparing and baking, but it's not like we could actually use that time to make money, we're having fun, and going to a store also takes time (and/or fuel). Electricity is cheap.
On a related note, I was surprised when I did calculations on how much it actually costs us to bake our own bread. We started doing that a lot during this pandemic. It turns out, the cost of ingredients + electricity adds to slightly less than what it would cost to buy the same products from a bakery. This doesn't price in time spent on preparing and baking, but it's not like we could actually use that time to make money, we're having fun, and going to a store also takes time (and/or fuel). Electricity is cheap.