1000V DC Metal String Combiner Box – 2 String + SPD + DC Isolator (WMPV-2S2)
The WMPV-2S2 is an IP65 metal solar string combiner box designed for dual-string solar PV systems operating up to 1000V DC. It provides safe string termination, integrated DC isolation, and surge protection in one robust, factory-configured enclosure. Supplied complete with a DC rotary isolator and Type 2 DC surge protection...
Read full descriptionThe WMPV-2S2 is an IP65 metal solar string combiner box designed for dual-string solar PV systems operating up to 1000V DC. It provides safe string termination, integrated DC isolation, and surge protection in one robust, factory-configured enclosure.
Supplied complete with a DC rotary isolator and Type 2 DC surge protection device (SPD), this unit protects inverter electronics from transient overvoltage while allowing safe local disconnection during maintenance. The metal enclosure offers enhanced mechanical strength, making it well suited to commercial sites, plant rooms, and exposed installations.
Installer Tip: Choose the 2-string configuration where separate MPPT inputs are used, or where parallel string management is required for larger domestic or light commercial PV systems.
Key Features
- 2 String / 2 Output configuration – suitable for dual MPPT systems
- 1000V DC rated – compatible with modern solar arrays
- Type 2 DC SPD – protects inverter against surge damage
- Integrated DC rotary isolator – safe local isolation
- IP65 metal enclosure – increased durability for exposed installs
- Pre-configured internal wiring for faster installation
- Designed for residential and commercial solar PV systems
Compare Solar String Combiner Boxes
| Model | Strings | Enclosure | Best For |
|---|---|---|---|
| WPPV-1S1 | 1 String / 1 Output | IP65 Plastic | Standard domestic PV systems |
| WPPV-2S2 | 2 Strings / 2 Output | IP65 Plastic | Dual MPPT domestic systems |
| WMPV-1S1 | 1 String / 1 Output | IP65 Metal | Exposed or higher durability installs |
| WMPV-2S2 (This Product) | 2 Strings / 2 Output | IP65 Metal | Commercial dual-string systems |
Please note: Image is for illustrative purposes only. The product supplied is a metal unit and may differ from the image shown.
What is the difference between 1-string and 2-string combiner boxes?
A 2-string combiner box allows two separate PV strings to be connected and managed independently, typically for dual MPPT inverter inputs.
Why choose a metal enclosure?
The metal enclosure provides increased mechanical protection and is often preferred for commercial or exposed environments.
Does this include surge protection?
Yes. A Type 2 DC SPD is factory fitted to protect the inverter from transient overvoltage.
Can this be installed outdoors?
Yes. The IP65 rating makes it suitable for outdoor wall mounting.
What is the maximum voltage rating?
This combiner box is rated for solar systems up to 1000V DC.
- Model: WMPV-2S2
- Configuration: 2 Strings / 2 Output
- Max System Voltage: 1000V DC
- Surge Protection: Type 2 DC SPD
- Isolator: Integrated DC Rotary Isolator
- Enclosure: IP65 Metal
- Mounting: Surface Mount
- Application: Domestic & Commercial Solar PV
This combiner box must be installed by a qualified electrician in accordance with current solar PV installation standards.
- Install in accordance with BS 7671 and PV system design requirements
- Confirm correct polarity of all string connections before energising
- Keep earth conductors short for optimal SPD performance
- Verify system voltage does not exceed 1000V DC rating
- Carry out full DC testing and commissioning checks
