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List
Fronius
6660749
Wattpilot Go 22 J 2.0 AUS
-
| Max. nominal charging power (kW): | 22.00 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | plug socket |
Fronius
6652345
Wattpilot Home 22 J 2.0
-
| Max. nominal charging power (kW): | 22.00 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | plug socket |
Sigenergy
6660565
Sigen EV AC Charger 22kW
-
| Max. nominal charging power (kW): | 22.00 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | fixed cable |
Sungrow
6656506
IDC180E, DC Charger 180 kW
DC EV Charger,CCS2 Ladekabel 5m, PTB/Eichrecht
| Max. nominal charging power (kW): | 180.00 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | fixed cable |
Sungrow
6660701
Sungrow IDC30E Fast DC charger
-
| Max. nominal charging power (kW): | 30.00 |
|---|---|
| Connection charge point: | fixed cable |
Sigenergy
6660563
Sigen EV AC Charger 7kW
-
| Max. nominal charging power (kW): | 7.00 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | fixed cable |
Sigenergy
6660719
Sigen EV DC Charging Module 12kW
-
| Max. nominal charging power (kW): | 12.50 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | fixed cable |
Sigenergy
6660564
Sigen EV AC Charger 11kW
-
| Max. nominal charging power (kW): | 11.00 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | fixed cable |
Sigenergy
6660720
Sigen EV DC Charging Module 25kW
-
| Max. nominal charging power (kW): | 25.00 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | fixed cable |
SolarEdge
6660600
EV Charger Kit SE-EV-SA-KIT-LM32
-
| Max. nominal charging power (kW): | 7.40 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | fixed cable |
Fronius
6652344
Wattpilot Home 11 J 2.0
-
| Max. nominal charging power (kW): | 11.00 |
|---|---|
| Surplus charge: | yes |
| Connection charge point: | plug socket |
Charging Stations – Products, Technology & Planning
Electromobility is on its way to becoming the norm – at least in parts of Europe and Asia. As a result, the demand for reliable charging infrastructure is growing. Installers and system planners in particular are faced with the task of developing customized solutions that are not only technically sound but also economically viable – for both residential and commercial clients. Krannich Solar provides everything they need: products, information, and expert advice.
Whether for a single-family home, multi-party solution, or commercial fleet – with smart planning, the EV charging station becomes a key component of a sustainable energy system.
AC or DC?
Charging stations are generally available in two types: AC (alternating current) and DC (direct current). For private or semi-public use, AC wallboxes with 11 or 22 kW are the most common solution. In commercial settings or high-demand charging parks, DC charging stations with 30 kW to 300 kW and more are used.
Typical use cases:
- Single-family home: 11 kW AC wallbox – optionally with phase switching for reduced charging power (approx. 3.7 kW)
- Multi-family dwellings: Multiple 11 or 22 kW AC wallboxes with load management and optional access control (e.g. RFID authentication)
- Commercial & fleets: Mix of AC for staff and DC for fleet vehicles like buses, delivery vans, or forklifts
- Public locations: DC fast chargers to reduce idle time, especially on highways
Our charging stations are listed under the categories AC Charging Stations and DC Charging Stations. Accessories such as charging cables, mounting kits, and RFID cards can be found under Accessories.
PV Integration: How Surplus Charging Works
A charging station is essentially just another power consumer. That changes with surplus charging. This method prioritizes charging the EV when solar energy is available – avoiding unnecessary grid consumption. It can be done manually: plug in the car when your PV system is feeding power into the grid. However, dynamic PV surplus charging truly boosts self-consumption and reduces grid strain.
Requirements for dynamic PV surplus charging:
- Compatible wallbox: Must be controllable via external charge controller and/or able to communicate with the inverter or energy manager
- Compatible inverter: Inverter and wallbox must be interoperable – many manufacturers restrict compatibility to their own product lines
- Energy manager: Can be brand-specific or independent (e.g. Razo, Clever-PV using the OCPP interface)
- Smart meter: Measures both consumption and feed-in
All residential AC wallboxes in the Krannich portfolio support surplus charging.
In business setups and for DC chargers, surplus charging plays a minor role – these focus on performance delivery rather than self-consumption.
Compatible inverters are listed in product descriptions and datasheets. Our service team is happy to assist.
Communication & Control
Modern charging stations are part of interconnected energy systems. Key standards, interfaces, and protocols include:
- OCPP (Open Charge Point Protocol): Enables cloud- and network-based services, §14a integration, dynamic electricity billing, and smart charging park management
- Modbus: Used for communication between inverter, storage, smart meter, and wallbox
- LAN/Wi-Fi: For local or remote access
- ISO 15118: Defines vehicle-to-charger communication – supports load profiles and bidirectional charging
- RFID (Radio Frequency Identification): Secures public and semi-public chargers against unauthorized access – identity verification typically runs via OCPP
Registering & Approving Your Wallbox
In most European countries, EV chargers must be registered or approved by the local grid operator. In Germany, these general rules apply (based on standards such as VDE-AR-N 4100, NAV §19, and §14a EnWG). Similar thresholds apply in Austria, Switzerland, and other markets.
- ≤ 11 kW: Registration required – usually via a form and product datasheet. From 4.2 kW, §14a compliance is mandatory
- > 11 to 22 kW: Requires prior approval by the grid operator – can theoretically be rejected
- > 22 kW or DC chargers: Require individual grid compatibility check – including detailed planning, building notice, protection concept. In some cases, a full building permit may be needed
Exact documentation requirements vary – contact your grid operator for specifics.
Key Charging Station Manufacturers
Krannich Solar offers a broad portfolio of trusted brands:
- Sungrow: Our only DC charging station supplier. AC version includes integrated fault detection – no external RCD needed. 7 m Type 2 cable
- Delta AC Max: Low standby consumption, operable without app or software tool. Compact design
- Enphase IQ EV Charger 2: Built-in MID-certified meter, AI-based EMS, includes phase switching
- Fronius Wattpilot: MID-compliant, dynamic PV surplus charging (1.38 to 22 kW). German Design Award winner
- GoodWe HCA Series: Extremely quiet wallbox. Solar-only or hybrid PV/storage charging possible
- Huawei Smart Charger: Supports phase switching. Quick Installation
- Kostal Enector: Made in Germany. Highly robust (IK10 impact resistance). PV surplus and multiple charging modes
- Mennekes Amtron Professional: Designed for public/semi-public use. Dynamic load management for up to 100 stations. RCD can be tested/reset externally – low maintenance
- SMA eCHarger: Fast phase switching. AI-based charging management. Ready for bidirectional charging
- SolarEdge EVK22C: Controls up to 3 wallboxes per system – with PV surplus and low-tariff charging
- SolaX Smart EV Charger: TLS-encrypted cloud communication for secure data. 100% solar charging possible