What is the ruling of Islamic law regarding a tenant remaining in a house for which he pays rent in advance, when it was discovered that the house's electricity is stolen and not connected to an official meter, and is the tenant sinful for residing therein?

If a person rented a house without an electricity meter, and he knew about it, he has committed a forbidden act (haram (definition)). If he did not know, then there is no sin upon him for what has passed. He must now demand that the owner install a meter and pay the cost of his consumption to the competent authorities, or give it in charity if payment is not possible. If the owner refuses to install the meter, he must vacate the house and demand the remaining rent, threatening the owner with reporting the matter to the responsible authorities if he refuses.