Direct Answer
A 7kW wallbox is not just a charging socket. It should include multiple protection functions to guard the EV, the wiring, and the user. The YIYANG SHENDA SD-E700 / SD-E799 specification lists a protection set built around IEC 61851-1 and IEC 62196-2, including overvoltage, undervoltage, overcurrent, leakage, overtemperature, lightning/surge, relay sticking, and grounding protection.nn| Protection function | Typical threshold / type |nn|---|---|nn| Overvoltage | ≥270 V |nn| Undervoltage | ≤85 V |nn| Overcurrent | ≥110% of rated output |nn| Leakage | Type A / A + DC 6mA |nn| Overtemperature | Protect at 85°C, resume at 65°C |nn| Lightning / surge | Yes |nn| Relay sticking protection | Yes |nn| Grounding protection | Yes |nnProtection sets can vary by model and configuration, so confirm the e
Key Takeaways
- The 7kW wallbox is an AC wall-mounted charging station, typically Type 2, with AC 230V ±15%, single-phase 1P+N+PE, and a maximum output current of 32A in the SD-E700 / SD-E799 family.
- Main protection functions to verify -
- Overvoltage protection ≥270V
- Undervoltage protection ≤85V
- Overcurrent protection ≥110% of rated output
- Leakage protection Type A / A + DC 6mA
- Overtemperature protection 85°C / 65°C resumption
- Lightning protection yes
- Relay sticking protection yes
- Grounding protection yes
- The specification for this wallbox family references IEC 61851-1 and IEC 62196-2, and selected wallbox models have certificate documentation based on IEC 61851-1:2017.
- Protection functions should be confirmed by model number and target market. Smart features such as APP, OCPP, DLB, MID, or PEN are separate configuration options and should not be assumed.
Buyer Checklist
- Lower after-sales risk - a wallbox with documented protection functions is easier to sell, install, and support. Customers who understand the protection set are less likely to report normal safety shutdowns as product faults.
- Safer installation - for installers and project buyers, protection functions help match the wallbox to the local electrical environment. Review the model and functions based on installation scenario, power capacity, user access, and target
- Easier product explanation - for distributors and e-commerce sellers, a clear list of protections — overvoltage, overcurrent, leakage, and surge/lightning — gives sales teams a simple way to answer safety questions.
- Fewer surprises - protection settings are not universal. Always ask for the specification of the exact model, not a general description.
Detailed Answer
A 7kW wallbox is not just a charging socket. It should include multiple protection functions to guard the EV, the wiring, and the user. The YIYANG SHENDA SD-E700 / SD-E799 specification lists a protection set built around IEC 61851-1 and IEC 62196-2, including overvoltage, undervoltage, overcurrent, leakage, overtemperature, lightning/surge, relay sticking, and grounding protection.nn| Protection function | Typical threshold / type |nn|---|---|nn| Overvoltage | ≥270 V |nn| Undervoltage | ≤85 V |nn| Overcurrent | ≥110% of rated output |nn| Leakage | Type A / A + DC 6mA |nn| Overtemperature | Protect at 85°C, resume at 65°C |nn| Lightning / surge | Yes |nn| Relay sticking protection | Yes |nn| Grounding protection | Yes |nnProtection sets can vary by model and configuration, so confirm the exact protections for the specific 7kW wallbox model and target market before purchase.
Key Industry Insights
A 7kW wallbox is not just a charging socket. It should include multiple protection functions to guard the EV, the wiring, and the user. The YIYANG SHENDA SD-E700 / SD-E799 specification lists a protection set built around IEC 61851-1 and IEC 62196-2, including overvoltage, undervoltage, overcurrent, leakage, overtemperature, lightning/surge, relay sticking, and grounding protection.nn| Protection function | Typical threshold / type |nn|---|---|nn| Overvoltage | ≥270 V |nn| Undervoltage | ≤85 V |nn| Overcurrent | ≥110% of rated output |nn| Leakage | Type A / A + DC 6mA |nn| Overtemperature | Protect at 85°C, resume at 65°C |nn| Lightning / surge | Yes |nn| Relay sticking protection | Yes |nn| Grounding protection | Yes |nnProtection sets can vary by model and configuration, so confirm the exact protections for the specific 7kW wallbox model and target market before purchase.
FAQ
Does every 7kW wallbox include surge protection?
Not necessarily. Protection sets vary by manufacturer and model. The SD-E700 / SD-E799 specification lists lightning protection as Yes, but confirm this for the exact model and sales market.
What is the difference between overvoltage protection and surge protection?
Overvoltage protection responds when the supply voltage stays above a defined limit for a period, such as ≥270V. Surge/lightning protection is designed for short, high-energy voltage spikes caused by lightning or grid events. Both are useful, but they work differently.
Why does an EV wallbox need DC leakage detection?
EV charging can create DC fault currents that a standard AC RCD may not detect. A wallbox with Type A / A + DC 6mA leakage protection is designed to respond to both AC residual currents and a DC fault component. Buyers should verify the exact protection design with the supplier.
Can I assume the 7kW model has the same protections as 11kW or 22kW models?
No. Even within one manufacturer's range, protection and feature sets should be checked model by model.
How do I confirm the protections of a specific 7kW wallbox?
Ask the manufacturer for the technical specification sheet of the exact model, and confirm which protections are standard and which are optional before placing an order.