1000V DC Metal String Combiner Box – 1 String + SPD + DC Isolator (WMPV-1S1)
The WMPV-1S1 is an IP65 metal solar string combiner box designed for single-string solar PV installations requiring enhanced enclosure durability. Rated for 1000V DC systems, it provides safe string termination, surge protection, and local DC isolation in one factory-configured unit. Supplied complete with a DC rotary isolator and Type 2...
Read full descriptionThe WMPV-1S1 is an IP65 metal solar string combiner box designed for single-string solar PV installations requiring enhanced enclosure durability. Rated for 1000V DC systems, it provides safe string termination, surge protection, and local DC isolation in one factory-configured unit.
Supplied complete with a DC rotary isolator and Type 2 DC surge protection device (SPD), this combiner box protects inverter electronics from transient overvoltage while allowing safe disconnection for maintenance. The metal enclosure provides improved mechanical protection, making it suitable for exposed or commercial environments.
Installer Tip: Choose the metal enclosure version for farm buildings, plant rooms, car ports, or exposed outdoor installations where additional impact resistance is preferred.
Key Features
- 1 String / 1 Output configuration – ideal for single MPPT systems
- 1000V DC rated – compatible with modern PV arrays
- Type 2 DC SPD – protects inverter from surge damage
- Integrated DC rotary isolator – safe local isolation
- IP65 metal enclosure – enhanced mechanical protection
- 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 (This Product) | 1 String / 1 Output | IP65 Metal | Exposed or higher durability installs |
| WMPV-2S2 | 2 Strings / 2 Output | IP65 Metal | Commercial dual-string systems |
Why choose the metal version?
The metal enclosure provides increased mechanical durability and is better suited for exposed or industrial environments.
Does this include surge protection?
Yes. A Type 2 DC SPD is factory fitted to protect inverter electronics from transient overvoltage.
Can this be installed outdoors?
Yes. The IP65-rated enclosure is suitable for external installation.
Is this suitable for commercial solar systems?
Yes. It is designed for both residential and light commercial PV installations up to 1000V DC.
What is the maximum voltage rating?
The combiner box is rated for solar systems up to 1000V DC.
- Model: WMPV-1S1
- Configuration: 1 String / 1 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 near the array or inverter location as per system design
- Verify correct polarity for PV string connections
- Ensure earth connection is kept short for effective SPD operation
- Confirm total system voltage does not exceed 1000V DC rating
- Complete full DC testing before commissioning
