1000V DC String Combiner Box – 2 String + Type 2 SPD + DC Isolator (WPPV-2S2)
The WPPV-2S2 is an IP65 plastic solar string combiner box designed for two-string PV installations requiring integrated DC isolation and surge protection. Rated for 1000V DC systems, it provides safe string termination, overvoltage protection, and local isolation for dual MPPT or split-array solar setups. Supplied complete with a DC rotary...
Read full descriptionThe WPPV-2S2 is an IP65 plastic solar string combiner box designed for two-string PV installations requiring integrated DC isolation and surge protection. Rated for 1000V DC systems, it provides safe string termination, overvoltage protection, and local isolation for dual MPPT or split-array solar setups.
Supplied complete with a DC rotary isolator and Type 2 DC surge protection device (SPD), this unit protects inverter electronics from transient overvoltage while enabling safe maintenance isolation. The robust IP65 enclosure allows outdoor mounting in residential and light commercial installations.
Installer Tip: Ideal for systems using dual MPPT inverters or split roof arrays. Keeps both strings neatly terminated while maintaining regulation-ready surge protection.
Key Features
- 2 Strings / 2 Output configuration – supports dual MPPT systems
- 1000V DC rated – compatible with modern solar arrays
- Type 2 DC SPD – protects inverter from transient overvoltage
- Integrated DC rotary isolator – safe local disconnection
- IP65 plastic enclosure – weatherproof for external installation
- Pre-configured internal wiring for faster installation
- Designed for residential and light commercial PV systems
Compare Solar String Combiner Boxes
| Model | Strings | Enclosure | Best For |
|---|---|---|---|
| WPPV-1S1 | 1 String / 1 Output | IP65 Plastic | Single-string domestic PV systems |
| WPPV-2S2 (This Product) | 2 Strings / 2 Output | IP65 Plastic | Dual MPPT or split-array systems |
| WMPV-1S1 | 1 String / 1 Output | IP65 Metal | Higher mechanical protection environments |
| WMPV-2S2 | 2 Strings / 2 Output | IP65 Metal | Commercial or exposed installs |
What is the difference between 1S1 and 2S2?
The 2S2 version supports two separate PV strings, making it suitable for dual MPPT inverters or split roof arrays.
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 plastic enclosure is designed for weatherproof external mounting.
Is this suitable for commercial solar systems?
Yes, for light commercial installations within 1000V DC system limits. For harsher environments, the metal version may be preferred.
What is the maximum DC voltage rating?
The unit is rated for systems up to 1000V DC.
- Model: WPPV-2S2
- Configuration: 2 Strings / 2 Output
- Max System Voltage: 1000V DC
- Surge Protection: Type 2 DC SPD
- Isolator: Integrated DC Rotary Isolator
- Enclosure: IP65 Plastic
- Mounting: Surface Mount
- Application: Domestic & Light Commercial Solar PV
This combiner box must be installed by a qualified electrician in accordance with current solar PV installation standards.
- Install at array location or near inverter as specified in system design
- Ensure correct polarity for each PV string
- Maintain short earth connection to SPD for effective surge discharge
- Confirm total system voltage does not exceed 1000V DC rating
- Carry out full polarity and insulation resistance testing before commissioning
