The MidNite Solar MNPV6 Combiner Box is a professional-grade DC combiner designed for safely combining multiple solar PV strings in residential, commercial, and off-grid solar installations. Built with a gray aluminum Type 3R rainproof enclosure and a custom insulating dead front, this 6-way combiner ensures durability, safety, and clean internal wiring for both 150VDC breaker systems and high-voltage fuse-based systems.
Engineered for flexibility, the MNPV6 supports six 150VDC breakers or four 600/1000VDC touch-safe fuse holders, making it suitable for charge controller systems and grid-tie inverter installations. With ETL listing to UL1741 standards, it meets North American safety requirements while delivering reliable performance in harsh outdoor environments—ideal for Tanzanian solar conditions.
Features & Benefits
- Supports 6 PV Strings (Breaker Configuration) : Combines up to six 150VDC breaker-protected solar strings, reducing wiring clutter and improving system organization.
- Dual Voltage Flexibility : Accepts six 150VDC breakers or four 600/1000VDC touch-safe fuse holders, allowing compatibility with both off-grid charge controllers and high-voltage grid-tie inverters.
- 120A Breaker Bus Bar Included : Handles higher output currents, making it suitable for larger residential and commercial solar installations.
- 80A Fuse Bus Bar Included : Provides reliable current handling for high-voltage fuse-based systems.
- Custom Insulating Dead Front : Injection-molded plastic dead front hides internal wiring for enhanced installer safety and a professional finish.
- Rainproof NEMA 3R Aluminum Enclosure : Powder-coated aluminum housing protects against rain, heat, and harsh outdoor conditions.
- Split Plus Bus Bar Capability : Allows support for two separate inverters or charge controllers, increasing design flexibility.
- 15-Position Negative Bus Bar : Provides ample termination space for organized and clean wiring connections.
- 14-Position Ground Bus Bar : Ensures proper grounding and improved system safety compliance.
- Knockouts for Conduit & Lightning Arrestors : Simplifies installation and supports surge protection in lightning-prone areas.
- Lockable Enclosure Design : Enhances site security for outdoor and remote solar installations.
- ETL Listed to UL1741 : Meets recognized safety standards for reliable performance in professional solar systems.
Use Cases
- Residential Off-Grid Solar Systems : Combines up to six PV strings for 150VDC charge controller setups in homes without grid access.
- Grid-Tie Solar Installations : Supports high-voltage (600V/1000VDC) fuse configurations for commercial and rooftop grid-connected solar systems.
- Hybrid Solar Systems : Ideal for systems using both grid-tie inverters and battery-based charge controllers, thanks to its split bus bar capability.
- Rural Electrification Projects : Suitable for community solar projects, schools, clinics, and NGOs in remote areas requiring safe DC string combining.
- Commercial & Industrial Rooftop Solar : Handles higher current output (up to 120A with breakers), making it fit for larger PV arrays.
- Agricultural Solar Pumping Systems : Combines multiple panel strings for irrigation and water pumping installations.
- Telecom & Remote Site Power Systems : Provides organized and secure PV string combining for telecom towers and off-grid communication infrastructure.
- Expandable Solar Installations : Allows future system expansion by accommodating multiple strings within one enclosure.
Value Propositions
- Improves System Safety : Integrated dead front and UL1741 listing enhance installer and user protection in DC solar applications.
- Reduces Installation Time & Labor Costs : Pre-configured busbars, knockouts, and organized terminal layout simplify wiring and speed up setup.
- Flexible for Multiple System Designs : Supports both 150VDC breaker systems and 600/1000VDC fuse systems, reducing the need for separate combiner models.
- Scalable for Growing Solar Arrays : Accommodates up to six PV strings, making it ideal for future system expansion without replacing equipment.
- Supports Dual Outputs : Split plus busbar capability allows connection to two inverters or charge controllers, increasing design versatility.
- Durable Outdoor Construction : Powder-coated aluminum NEMA 3R enclosure ensures long-term performance in harsh climates.
- Professional & Clean Installation Appearance : Custom molded dead front conceals wiring for a neat and compliant finish.
- Optimized for High Current Handling : Up to 120A output (breaker configuration) supports medium to large solar installations.
- Cost-Effective Long-Term Investment : High-quality materials and modular design reduce maintenance and replacement costs over time.
Local Market Positioning in Tanzania
- Built for Tropical Climates : Rainproof NEMA 3R aluminum enclosure resists corrosion and moisture common in Tanzanian coastal and inland conditions.
- Ideal for Rural Electrification Initiatives : Well-suited for NGO, government, and community solar projects expanding access to power in remote regions.
- Supports Off-Grid Households : Combines multiple PV strings for home solar systems in areas without reliable grid access.
- Compatible with Commercial Rooftop Systems : Meets the needs of businesses in Dar es Salaam, Arusha, and other urban centers installing medium-sized solar arrays.
- Enables Agricultural Solar Pumping : Provides organized DC string combining for solar water pumps used in farms and irrigation projects.
- Flexible for Hybrid Solar Architectures : Works with both off-grid and grid-tie systems, appealing to mixed installations in urban and peri-urban settings.
- Professional Safety Compliance for Installers : UL1741 ETL listing assures local solar professionals of recognized safety standards.
- Reduces Logistics Complexity : One combiner solution supports various configurations, reducing the need for multiple product types in Tanzanian solar inventories.
- Enhances Long-Term Reliability : Durable weatherproof construction minimizes maintenance in remote and high-dust environments.
Technical Specification
| Specification | Details |
|---|---|
| Model | MNPV6 |
| Product Type | PV DC Combiner Box |
| Enclosure Rating | NEMA 3R – Outdoor Rainproof |
| Enclosure Material | Powder-Coated Aluminum with Stainless Steel Hardware |
| Dead Front | Custom Injection-Molded Insulating Plastic |
| Mounting Options | Vertical Wall Mount, Pole Mount, Sloped Roof (Up to 14° Incline / 3:12 Pitch) |
| Number of PV Strings | 6 Strings (150VDC Breakers) / 4 Strings (600–1000VDC Fuses) |
| Maximum Output Circuits | 2 |
| Breaker Compatibility | 150VDC & 300VDC MNEPV Breakers |
| Fuse Compatibility | 600VDC / 1000VDC Touch-Safe Fuse Holders |
| Maximum OCPD Rating | 63A (150V Breaker), 50A (300V Breaker), 30A (Fuses) |
| Maximum Output Current | 120A (Breaker Configuration), 80A (Fused Configuration) |
| Included Busbars | 120A Breaker Busbar, 80A Fuse Busbar |
| Negative Bus Bar | 15 Positions |
| Ground Bus Bar | 14 Positions |
| Wire Range (PV Input) | 14–6 AWG |
| Wire Range (Output) | 14 AWG to 1/0 AWG |
| Lug Temperature Rating | 90°C |
| Disconnect Option | Up to Three 300VDC Breakers (7–50A) Without Combining Busbar |
| Knockouts | For Conduit, Waterproof Strain Reliefs, MC Connectors & Lightning Arrestors |
| Lockable Enclosure | Yes |
| Application Voltage Range | Up to 150VDC (Breakers) / Up to 1000VDC (Fuses) |
| Breakers / Fuses | Sold Separately |


