Electric Car Charging Stations for Apartment Buildings

Let’s assume every tenant flat owner gets their own wallbox, each connected to a flat meter in a corresponding apartment. In this situation, billing is based on the calibrated household meter and the one's domestic electricity tariff. This means that the charging current does not need to be billed separately, as the user is already paying for it through their existing electricity contract. In this case, wallboxes such as the go-e Charger Gemini 2.0 and Gemini flex 2.0 with an RFID management feature and simple meter are perfectly suitable. Such EV charging apartment setup ensures convenient and well-protected charging for the resident.

If a wallbox is connected to a separate, calibrated electricity meter provided by the energy supplier, the sole user will be billed directly by the supplier. However, an additional electricity contract is required in addition to the home contract. All go-e Chargers Gemini and Gemini 2.0 series are sufficient. 

If the wallbox has its own MID-compliant electricity meter, like our go-e Charger PRO, the electricity consumed can be accurately assigned to each user. Landlords or property managers can then bill tenants or flat owners separately for their electricity usage, such as through the utility bill. The charging current is simply subtracted from the overall electricity consumption and allocated to them. 

Charging data can be transmitted in various ways. For automatic invoicing, backend systems from our integration partners are a convenient solution, especially as the number of charging stations grows. For smaller properties, you can manually manage billing by exporting charging data directly from the go-e Portal.

If multiple tenants share one or more wallboxes, the measurement of the charging current must be transparent and traceable for each user. The charged kWh can be invoiced via the utility bill. Using the right software, such as that from one of the go-e integration partners, makes tracking and billing charging processes easy.

The go-e Charger PRO CABLE ensures compliance with the legal requirements for kWh-accurate billing. In addition, the go-e Charger PRO CABLE ME, which complies with measurement and calibration law, can also be used.

Authentication via RFID chips enables accurate apartment-related billing, ensuring only authorised users can charge.

Efficient management, real-time monitoring, billing, and smart charging for multiple users are only possible with a wallbox that has an internet connection. 

With go-e wallboxes, you have flexible connectivity options depending on the building setup and the go-e Charger series: LTE, WiFi, or Ethernet. The go-e Charger PRO supports wired data exchange, making it ideal for integrating with external systems and enabling efficient smart charging management.

The go-e Charger features integrated static load balancing, allowing you to manually set a power limit for a group of charging stations, ensuring the predefined amount of electricity cannot be exceeded. It also provides the option to prioritise individual wallboxes. This is ideal for charging multiple electric vehicles on the same power connection. 

Furthermore, go-e wallboxes support dynamic load balancing via the go-e Controller or through an external system via OCPP, Modbus TCP, or our open API. The system adjusts charging power based on available electricity at the power supply connection of the whole building and even surplus PV. This ensures safe charging for large setups without risking outages and lowers costs.

The OCPP communication standard is great for managing multiple electric car charging stations for apartments even from different manufacturers within a single system. This is advantageous for building owners installing multiple chargers for their residents. OCPP enables automated integration with backend systems for simple management and invoicing. 

Modbus TCP works well with building energy management systems, allowing property managers to control energy use, balance the power load, and manage utilities centrally without the need to connect to external systems or cloud-based backends. 

Alternatively, our open API (local and cloud) provides a flexible wallbox management option, allowing you to customise integrations to meet your specific needs.

If a building has PV panels, they can benefit EV drivers. go-e Chargers used with the go-e Controller or another energy management system direct surplus solar power to charge electric vehicles once all household energy needs are met.

Moreover, go-e users can combine flexible energy tariffs with excess solar charging. They only need to activate flexible energy tariffs in the go-e app and set a price limit. Then, the go-e Charger will automatically find the cheapest times to charge the vehicle when surplus solar power isn't available.