Cost of accommodation

It's definitely outrageous.

However, there are a couple of other scenarios too. Your rent possibly hasn't changed in years and it was low. Then, someone else rented the condo before or after you and really used the AC, putting the electricity use into the DAC rate. It's also possible that due to the potential difficulty in communicating, that it is simply a way to raise the rent and offer an easy explanation.

No matter what, hopefully you can find a place that you like at a price that you like too.