The EnergieNetz Hamburg e.G. is a cooperative of committed citizens that stands for citizen participation and citizen responsibility in the Hamburg energy transition. ENH demands a sustainable, democratic and regenerative energy supply and promotes the systematic expansion of a renewable energy system in the metropolitan region of Hamburg.
In mySmartLife, EnergieNetz Hamburg participates with projects of electric power tenant supply, that allows a direct supply of electricity from local generating facilities to one or to several customers (e.g., tenants in multi-family dwellings). For this purpose, ENH installs PV-plants as an energy producer on the roofs of the houses. ENH supplies electricity directly to the residents or users of the building. Two exemplary projects are presented below.
Organic bakery "Springer"
The first example is a “one-to-one” project with a company as power consumer for a 99 kWp PV-plant. At an energy event, the owner of the organic bakery got in contact with ENH. The roof of the bakery house built in 2012 was statically already designed for the installation of a PV system. However, this was not implemented for various reasons.
After a short negotiation period, ENH has concluded a roof leasing contract and a long-term electricity supply contract with the bakery. The PV-modules and the inverters were installed completely in September 2019. The lack of space in the technical room required a metering cabinet built to measure. That led to a delay. Since February 2019 the plant is in charge and delivering 37 percent of the electricity power, the bakery needs. This self-consumption could be increased with a battery-storage but unfortunately there is absolutely no space for it. This problem could be solved in the medium-term (2021/2022) by refurbishments related to the adjustment of the bakery vehicles to electromobility. The residual current is fed into the grid for feed-in compensation.
The expected production of the plant is 93,843 kWh / year, with an expected self-consumption of 34,357 kWh / y (36.6%). Due to the consumption characteristics, there are two cost advantages for the bakery: the working price for the direct-delivery and the demand rate for consumers over 100,000 KWh/ year decrease.
|PV generator power||99,82||kWp|
|PV array surface||537,7||m²|
|Number of PV modules||322||Q.PEAK-G4.1 310 Rev5 of Hanwha Q.Cells|
|Number of inverters||3||3 x SUN2000-33KTL-A of Huawei Technologies|
|Expected Annual Power Production (PV-Energy AC)||93.843||kWh/a|
Paul-Gerhardt-Kirche Apartments (PGK)
The second example is a “one-to-x” project with one PV-plant on the roof of a multiple dwelling with most of the tenants of the building as electricity power customers. This project was pushed by the “Solaroffensive Hamburg ”, a platform that was initiated by ENH and several partners on which interested parties and specialists of PV systems can come into contact.
The church representatives were very interested in solutions with which they could promote climate protection and were very pleased to have found an experienced partner in the ENH, which plans, implements, operates and even finances the PV-plant.
This project was supplemented by a battery storage unit, which significantly increases the tenants' own consumption rate. The energy is mainly produced on sunny days when the residents are at work or on the road. In the evening, consumers are back at home and need electricity for lighting, media, cooking, etc.
Unfortunately, the corona restrictions have led to construction delays and the plant has only now (end of November 2020) been launched. Tenants are expected to move in from March 2021. They will be informed of the possibilities of direct electricity supply when the lease is signed. ENH will then get in contact with them and offer electricity from its own roof at favourable conditions. Experience shows that 85 to 95 percent of tenants conclude an electricity supply contract with ENH.
|PV generator power||29,92||kWp|
|PV array surface||151,7||m²|
|Number of PV modules||95||AXIpremiumBLK AC-315M/60S|
|Number of inverters||1||SolarEdge SE27.6K SETAPP|
Expected Annual Power Production (PV-Energy AC)
Add battery storage
kWh - SolarEdge LI - IO RESU10H