Location: Russia, Republic of Tatarstan, Kazan
Task: Reducing electricity consumption from the network when operating boiler equipment
Type: On-grid solar power plant
Installation time: 7 days

About the object

An operating block-modular boiler house that provides hot water and heat to one of the residential complexes in Kazan.

At the time of installation of the solar power plant, the boiler room is located in an open area, without tall buildings and trees nearby, however, after 2 years, a multi-level covered parking lot is planned to be built on the south side of the building, so the classic orientation of solar panels to the south was not suitable for this project. In addition, ventilation fungi on the roof of the building made it possible to place solar panels only with an east-west orientation. This orientation of the solar panel array will avoid shading of the panels and also ensure the highest possible output. There are 36 solar panels each facing east and west.

How will solar panels work?

The solar panels will operate as part of a grid-connected solar power plant, which means that the grid-connected solar inverters will be connected in parallel to a three-phase ~400V input. In order to avoid releasing excess generated energy into the network, inverters online measure the current consumption of the boiler room using current transformers (sensors). If the boiler room begins to consume less electricity than the solar panels produce, the inverter will reduce the output to the boiler room consumption level.

About equipment

• Solar panels: Delta BST 450-72 HC – 72 pcs., monocrystalline, power each 450W
• Network inverter: SmartWatt 15K 3P – 2 pcs., three-phase inverter with an output power of 15000 W
• Protective equipment: SPD FEEO, Protective DC circuit breaker FEEO
• Mounting kit for solar panels
• MC4 connectors
• Solar cable 2*6mm2