What causes electrical surges in a house

Tenant electricity: energy transition in your own house

Tenant electricity - what's behind it?

Tenant electricity is electricity that is generated in solar systems on the roof of a residential building and delivered to final consumers (especially tenants) in this building or in residential buildings or ancillary systems in the same quarter without a grid connection. The electricity not used by the tenants is fed into the general supply network and remunerated. In contrast to electricity purchased from the grid, tenant electricity does not include some cost components such as grid fees, grid-side surcharges, electricity tax and concession fees.

In addition, a subsidy is granted for every kilowatt hour of tenant electricity - the so-called tenant electricity surcharge. This is intended to create additional incentives for the expansion of solar systems on residential buildings, and the tenants (residents of the house) to be economically involved. The tenant electricity surcharge was introduced as a new form of sale for the first time with the Renewable Energy Sources Act (EEG 2017) and thus complements the existing support mechanisms of the market premium and feed-in tariff. As a major difference to the last two forms of sale, the tenant electricity surcharge does not require feeding into the grid.

With the EEG 2021 (PDF, 568 KB), the funding conditions have been improved: the tenant electricity surcharge has been increased and the regulation on system aggregation relaxed. As a result, the profitability can be further improved, especially with larger tenant electricity systems. In addition, so-called neighborhood solutions are now possible, i.e. under certain conditions buildings in the vicinity can also be supplied with tenant electricity. With the introduction of the “supply chain model”, the use of the tenant electricity surcharge is now also simplified if the tenant electricity is supplied by third parties. The basis for this was the tenant electricity report of the federal government according to § 99 EEG 2017 (PDF, 678 KB).

The tenant electricity subsidies in detail

Until 2017, tenant electricity from photovoltaic systems usually did not pay off for landlords, despite the advantages in terms of taxes and levies, among other things because tenant electricity models incur considerable costs for billing, sales and measurements. The tenant electricity surcharge compensates for these additional costs and makes tenant electricity more economically attractive. The aim of the funding is to involve tenants directly in the energy transition.

The tenant electricity surcharge is based on the time the system is commissioned and then applies for a period of 20 years. Just as with the feed-in tariff, the amount of the tenant electricity surcharge decreases slightly every month after commissioning. In January 2021, the tenant electricity surcharge for new systems is between 3.79 ct / kWh (10 kW) and 2.37 ct / kWh (100 kW). The electricity not used by the tenants is fed into the general supply network and remunerated in accordance with the feed-in tariff applicable at the time of commissioning.

The tenant electricity surcharge is only paid for electricity from solar systems that have been put into operation after the law came into force. In addition, the system for which the tenant electricity surcharge is to be claimed must be registered with the Federal Network Agency. Tenants can still choose their electricity provider freely. The regulations on tenant electricity include requirements for the term of the tenant electricity contract, prohibit coupling with the rental agreement and provide for an upper price limit for tenant electricity.