---
product_id: 408494269
title: "PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable"
brand: "powgrow"
price: "HK$1642"
currency: HKD
in_stock: true
url: https://www.desertcart.hk/products/408494269-pv-combiner-box-4-string-metal-solar-combiner-box-15a
store_origin: HK
region: Hong Kong
---

# 50A Air Circuit Breaker IP65 Waterproof Metal Lockable Box Built-in Surge Protective Device PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable

**Brand:** powgrow
**Price:** HK$1642
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your solar game with ultimate safety & efficiency!

## Quick Answers

- **What is this?** PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable by powgrow
- **How much does it cost?** HK$1642 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/408494269-pv-combiner-box-4-string-metal-solar-combiner-box-15a)

## Best For

- powgrow enthusiasts

## Why This Product

- Trusted powgrow brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **50A Air Circuit Breaker Control:** Quickly isolates faults to maintain uninterrupted solar power flow.
- • **Integrated 15A Fuses for Each String:** Individual overload protection maximizes safety and system longevity.
- • **Robust Metal Housing with IP65 Rating:** Durable, weatherproof design ensures reliable outdoor solar system protection.
- • **Pre-Wired with Premium Solar-Grade Cables:** Simplifies installation while optimizing electrical efficiency.
- • **Advanced Surge Protection & Lightning Arrestor:** Safeguards your investment from unpredictable power surges and storms.

## Overview

The PowGrowPV Combiner Box is a professional-grade, metal-encased solar combiner designed for on/off-grid photovoltaic systems. Featuring four 15A fuses, a 50A air circuit breaker, and a built-in surge protective device, it ensures superior overload, short circuit, and lightning protection. Its IP65 waterproof rating and pre-wired solar-grade cables make installation seamless and durable for outdoor use, optimizing your solar panel system’s performance and safety.

## Description

PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable

## Features

- Professional PV combiner box is suitable for your Photovoltaic On/Off-Grid Solar Power Generation Systems. Which makes your solar panel system work reliably and safety. With multifunction: PV array input with first class combination, Quickly cut off circuit, anti-thunder protection, anti-reverse, overload, etc.
- Metal box with a lock. Waterproof class: IP65. Durable metal box makes it much more suitable for outside use and installation. It has a longer lasting time than the PVC plastic solar combiner box. The internal mount plate is also made of metal.
- High quality wires. All wires are pre-wired in the box. Our solar combiner box is used professional wires that are especially for solar system. Built-in with a ground wire connector, the ground wire installation is available. Please ensure the current and voltage of single PV array doesn’t exceed 10A/250VDC. Then you can connect solar panel to the combiner box.
- Built in with 4pcs individual 15A rated fuse(10x38mm). Max current of single PV input array is 10A. Their function is over load protection. The Combiner Box protects PV solar panel and inverter. Besides it will reduce the length of cable connect from panel to inverter, optimize system instruction makes the system more useful and maintenance. All in all. It will make the PV power system increase output power.
- 50A air circuit breaker. It can provide short circuit fault protection and controls the combiner box output. Here is a Surge Protective Device/Lighting Arrester provides lightning protection. The “Green” indicates Normal, once it changes into “Red”. Remember to replace the SPD with a new one.

## Images

![PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable - Image 1](https://m.media-amazon.com/images/I/61dRMDFDw9L.jpg)
![PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable - Image 2](https://m.media-amazon.com/images/I/71XHIpQE+4L.jpg)
![PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable - Image 3](https://m.media-amazon.com/images/I/71JpeFRiLOL.jpg)
![PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable - Image 4](https://m.media-amazon.com/images/I/71PWuilc-uL.jpg)
![PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable - Image 5](https://m.media-amazon.com/images/I/71x5qVndkhL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is this UL rated?**
A: No I always call the customer service.

**Q: What size wire goes from the combiner strip (at top) to the breakers? #10 = 30 total amps.or #8=55amps. which one?**
A: #10 30 AMP Max

**Q: Have three strings.  I need a 20 amp fuse for one of them, can I replace one of the 15 amp fuses with a 20 amp and keep the remaining fuses 15 amps?**
A: For your case, please ensure the three strings' total voltage are close or the same to each other.

**Q: My panels have 8.9Amp.Should that be protected by 10Amp fuse?**
A: This does not matter. 10Amp and 15 Amp are both can be used. We offered 15Amp.

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-24*