---
product_id: 67987657
title: "ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System"
brand: "eco-worthy"
price: "€ 161.71"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.nl/products/67987657-eco-worthy-4-string-pv-combiner-box-with-lightning-arreste
store_origin: NL
region: Netherlands
---

# 500V 63A DC breaker 4-string input with 10A fuse each IP65 waterproof & lightning protection ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System

**Brand:** eco-worthy
**Price:** € 161.71
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Power up your solar game with safety and style!

## Quick Answers

- **What is this?** ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System by eco-worthy
- **How much does it cost?** € 161.71 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/67987657-eco-worthy-4-string-pv-combiner-box-with-lightning-arreste)

## Best For

- eco-worthy enthusiasts

## Why This Product

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

## Key Features

- • **Expandable & Future-Ready:** Room to grow your solar setup without swapping gear—perfect for scaling your green energy.
- • **Flexible 4-String Combiner:** Supports up to 4 solar panel strings with individual 10A fuses for optimal system safety.
- • **Effortless Plug & Play Setup:** Mount anywhere with no tools needed—get your solar system live in minutes.
- • **Weatherproof & Lightning Safe:** IP65-rated enclosure with built-in lightning arrester for worry-free outdoor use.
- • **Robust 500V 63A Circuit Breaker:** Industry-grade protection ensures your solar array runs safely and reliably.

## Overview

The ECO-WORTHY 4 String PV Combiner Box is a durable, weatherproof solution designed for on/off-grid solar systems. Featuring a 500V 63A DC circuit breaker, IP65 waterproof rating, and integrated lightning arrester, it safely combines up to four solar panel strings with 10A fuses each. Easy to install with a tool-free mounting buckle, this combiner box streamlines your solar setup while providing reliable protection and scalability.

## Description

desertcart.com : ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System : Patio, Lawn & Garden

Review: Incredibly versatile little boxes - one warning about the master breaker - I really love these little boxes. I've got three of them now. They make messing around and reconfiguring panels incredibly easy and safe. And if the topology isn't quite what is needed, everything is on a DIN rail making it easy to adjust the bits and pieces. Please note that the PUFA 2-pole breaker in the box is polarized. It appears to be wired correctly for the current direction but generally speaking polarized breakers are a bad idea in solar systems. So just be aware of this. My only critique is that the four little metal mounting tabs rust. Not enough to remove a star, though. 5 stars. In terms of using them, you need to know the basics about putting panels in series and putting strings in parallel. The combiner box combines series strings by paralleling them. Putting solar panels in series adds voltage but leaves the current the same. Putting solar panels in parallel adds current and forces the voltage to be the same. * With a combiner box, you do not parallel your panels or strings prior to going into the box. You parallel them through the box. That is what the box does, it allows you to safely parallel panels or strings. So the 10A current limit per input is not usually a problem. The fuse is there to protect the panels from shorts. If a string shorts out, all the other parallel strings will feed their current into it and that MUST blow the fuse. So you must size the fuse properly. Typically 12A, 15A, or 20A is the proper size for this function. * IT IS VERY IMPORTANT TO SIZE THE FUSES PROPERLY SO THEY BLOW IF TWO OTHER STRINGS FEED CURRENT INTO A SHORTED STRING. It is good that the unit comes with 12A fuses, that is almost always the correct size. If you screw this up you risk catching your wiring or panels on fire if a short develops. Panels have a "maximum series fuse" specification. Make sure the fuse is around that value. * The maximum current is a specification on the solar panel. Nearly all solar panels are either 5A or 10A and they can achieve this current regardless of the latitude. Assuming your strings are in series and that is what is fed into the box, then you want the current specifications for all the panels in series to match because if it doesn't one panel will restrict the current of the others and you will not get full production. * You want the voltages of all the strings you are combining through the combiner box to be roughly similar. The currents coming from each string into the combiner box can be different. * Remember, you have to add voltages for the panels making up each string and the string is then fed into one input of the combiner box, which adds currents. The rule of thumb here is that you want the operating voltages of each string to be similar and you also want the operating voltage for each string to be LESS THAN the open-circuit voltage for any of the strings. You don't want an operating voltage that is higher than the open-circuit voltage of any of your strings due to mismatching the strings, that can cause severe problems down the road. Solar panels are not designed to take indefinite reverse voltage (which is why larger combiner boxes have blocking diodes as well. Smaller combiner boxes typically do not have blocking diodes). * Severely mismatched strings will not give you optimal generation, but if you don't have a choice then its better than nothing. That said, you have to make absolutely sure that the operating voltage for any string does not exceed the open-circuit voltage for any other string (when the strings are mismatched), as per the label on the solar panels. I'm saying this a second time because it is important. -- * The BACKHAUL wiring is the wire that goes out of the combiner box through the large breaker and goes into your charge controller or hybrid solar inverter or whatever. You have to make sure that the backhaul wiring can handle the total combined worst-case current from the combiner. Typically this is going to be in the 15-25A range. Using 10 AWG wire for your backhaul is always a good idea because you will reduce losses through the cable. High quality solar cabling is typically 6mm^2 which is actually a bit better than 10 AWG (it's more like 9 AWG). * Make sure the MC4 connectors are rated for the current being carried. This is typically not an issue for each individual string (because the current is only 5A or 10A), but it can be an issue if you are using MC4 connectors on the backhaul cabling where the total current can be far more. Once the array is operating, on a good sunny day hand-feel the MC4 connectors on the backhaul (if any) to make sure they aren't hot. * Generally more voltage and less current is better, you get far lower losses that way, but you have to make sure that the open-circuit voltage of the strings does not exceed the specifications for the charger controller that you are backhauling into. -- * Now for voltage, that is mostly a function of the charge controllers your are feeding into. Make sure that voltages, particularly the open-circuit voltage of the strings, is compatible with your charge controller. * Charge controllers are not usually limited by the input current from the combiner box because most people use panel geometries that add voltage before combining the strings in parallel. Instead, most charge controllers are limited by their output current, which is generally a function of the battery voltage they are feeding into. * I strongly recommend using Victron charge controllers, which are 97% efficient, whenever possible. Victron has two reasonably-priced charge controllers, the MPPT 75-15 (max 75V in, roughly 10-30V out) and the MPPT 100-20 (max 100V in, roughly 10-60V out). 15A or 20A output current, max. These charge controllers need BATVOLTAGE + 5V coming into it from the combiner box in order to start. This is not usually a problem since you will be putting panels in series to create higher voltage strings anyway if you are smart. * Have fun! I am! I have three of these babies.
Review: Great enclosure - This seems like a great enclosure that is well wired and easy to mount. I mounted it outdoors at the panels so we shall see if it holds up to the outside environment. I only needed a 2 string enclosure, but this gives me room to expand. I only wish that they had included caps or plugs for entry points that were not being used. The wiring was neatly done and the external mounting tabs worked well without requiring penetrating the case's waterproof integrity. A gasket rests in the cover groove to ensure the waterproofing. I do wish that the breakers had individual switches for each solar string. There is only a master switch for the entire enclosure, but it works well for my small installation.

## Features

- [ Easy installation ] With mounting buckle, no key needed to open and close the box, very easy to use. Suit for any regular surface. Plug and play,pre-connected cable, very sturdy organized box to combine your solar panels, make your solar panel system connction easier
- [ 500V 63A PV DC Circuit Breaker ] ECO-WORTHY 4 String PV Combiner Box has 500V 63A PV DC Circuit Breaker, 10A pv current fuse and 9AWG cables. Besides, it has multiple PV array input, max current of single PV input array is 10A
- [ Suitable for outdoor use ] With lightning arrester and waterproof class of IP65, lighting protection, reverse-current protection and rain proof. It is safe and very suitable for outdoor use. So it is very suitable for solar system and RV
- [ Supports single PV connections of less than 10A/250Vdc ] As long as the current and voltage of a single PV does not exceed 10A/250Vdc, you can connect the combiner box.(E.g. If use the 195W 12V EC0-WORTHY solar panel, it can support solar panel system up to 780W in 12V system, 1560W in 24V system, 3120W in 48V system.)
- [ Proven Durable Quality ] Professional customer service team, feel free to ask any questions.We are one of the first brands to sell pv combiner box on desertcart, the old brand is more trustworthy

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07F5HDP2W |
| Best Sellers Rank | #307,997 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,695 in Solar & Wind Power Parts & Accessories |
| Brand | ECO-WORTHY |
| Color | Gray |
| Customer Reviews | 4.6 4.6 out of 5 stars (566) |
| Department | All Ages, Unisex |
| Finish Type | Matte |
| Global Trade Identification Number | 00699919851072 |
| Installation Type | Screw-In |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.6 pounds |
| Item model number | L03040401017-1 |
| Manufacturer | ECO-WORTHY |
| Material | Plastic |
| Product Dimensions | 8.66 x 6.69 x 4.33 inches |
| Style | Industrial |
| UPC | 699919851072 725621025897 |

## Product Details

- **Brand:** ECO-WORTHY
- **Color:** Gray
- **Finish Type:** Matte
- **Material:** Plastic
- **Style:** Industrial

## Images

![ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System - Image 1](https://m.media-amazon.com/images/I/61sBEdDE-8L.jpg)
![ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System - Image 2](https://m.media-amazon.com/images/I/71Iufv2xQ3L.jpg)
![ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System - Image 3](https://m.media-amazon.com/images/I/71t1OULU8lL.jpg)
![ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System - Image 4](https://m.media-amazon.com/images/I/71Eb+MZ7peL.jpg)
![ECO-WORTHY 4 String PV Combiner Box with Lightning Arreste, 12A Rated Current Fuse and Circuit Breakers for On/Off Grid Solar Panel System - Image 5](https://m.media-amazon.com/images/I/71ubKZ3nq0L.jpg)

## Questions & Answers

**Q: any recommendations needed for instalation**
A: Its really straight forreward. Make sure all your solar cables are fully connected, use volt meter to test each string. Make sure the connectors snap all te way in. Once all stringd connected, flip all fuses to off and check to see output to controller light is on, turn off and on and check each string individually. I found gauge of wire a bit thin and upgraded fuses to 30 Amps. Have used box 3 years at full 2400 Watt capacity with no problems.

**Q: Is it just a plug n play or does it come separate**
A: No you need to prep it. There is some wiring that needs to be done in the box before use.

**Q: If the ground wire is attached from the combiner box to the grounding rod, do the panels still need to be grounded?**
A: If the panels are grounded to the same rod, I suppose you do not need to add a second grounding. In case of an electrical storm, the grounding of the combiner panel is of the upmost importance.  I have used this connection to ground also the control charge, inverter and the DPS

**Q: Does this connect 4 100w panels in series or parallel?**
A: If you connect each panel (string) individually to the PV Combiner Box, the panel strings will be combined in parallel.  You can also connect two panel pairs or all four panels in series before connecting your four panel array to the PV Combiner Box.  However you connect your four panel array to the PV Combiner Box, keep in mind that each string (up to four maximum) must be limited to 10 Amps current as specified by Eco Worthy.  Also take note of the Eco Worthy specifications for maximum allowable voltage.  Parallel panel connections multiply current from each panel and series panel connections multiply voltage from each panel.  

If you are using the four panel array to charge batteries, you should also use a charge controller.  For a 400 Watt array, you should consider a MPPT Controller, which would work best with a higher input voltage achieved with series panel connections.  Note, however, most smaller MPPT controllers are limited to 100 Volts input.

Lastly, before selecting parallel or series panel connections, consider partial shading of the panels.  If you expect partial shading, parallel connections between panels would work best.  Refer to your panel manufacturer recommendations and panel specifications.  Also, always take care to make sure your wire size complies with applicable codes and specifications for current and voltage.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Incredibly versatile little boxes - one warning about the master breaker
*by M***N on April 15, 2023*

I really love these little boxes. I've got three of them now. They make messing around and reconfiguring panels incredibly easy and safe. And if the topology isn't quite what is needed, everything is on a DIN rail making it easy to adjust the bits and pieces. Please note that the PUFA 2-pole breaker in the box is polarized. It appears to be wired correctly for the current direction but generally speaking polarized breakers are a bad idea in solar systems. So just be aware of this. My only critique is that the four little metal mounting tabs rust. Not enough to remove a star, though. 5 stars. In terms of using them, you need to know the basics about putting panels in series and putting strings in parallel. The combiner box combines series strings by paralleling them. Putting solar panels in series adds voltage but leaves the current the same. Putting solar panels in parallel adds current and forces the voltage to be the same. * With a combiner box, you do not parallel your panels or strings prior to going into the box. You parallel them through the box. That is what the box does, it allows you to safely parallel panels or strings. So the 10A current limit per input is not usually a problem. The fuse is there to protect the panels from shorts. If a string shorts out, all the other parallel strings will feed their current into it and that MUST blow the fuse. So you must size the fuse properly. Typically 12A, 15A, or 20A is the proper size for this function. * IT IS VERY IMPORTANT TO SIZE THE FUSES PROPERLY SO THEY BLOW IF TWO OTHER STRINGS FEED CURRENT INTO A SHORTED STRING. It is good that the unit comes with 12A fuses, that is almost always the correct size. If you screw this up you risk catching your wiring or panels on fire if a short develops. Panels have a "maximum series fuse" specification. Make sure the fuse is around that value. * The maximum current is a specification on the solar panel. Nearly all solar panels are either 5A or 10A and they can achieve this current regardless of the latitude. Assuming your strings are in series and that is what is fed into the box, then you want the current specifications for all the panels in series to match because if it doesn't one panel will restrict the current of the others and you will not get full production. * You want the voltages of all the strings you are combining through the combiner box to be roughly similar. The currents coming from each string into the combiner box can be different. * Remember, you have to add voltages for the panels making up each string and the string is then fed into one input of the combiner box, which adds currents. The rule of thumb here is that you want the operating voltages of each string to be similar and you also want the operating voltage for each string to be LESS THAN the open-circuit voltage for any of the strings. You don't want an operating voltage that is higher than the open-circuit voltage of any of your strings due to mismatching the strings, that can cause severe problems down the road. Solar panels are not designed to take indefinite reverse voltage (which is why larger combiner boxes have blocking diodes as well. Smaller combiner boxes typically do not have blocking diodes). * Severely mismatched strings will not give you optimal generation, but if you don't have a choice then its better than nothing. That said, you have to make absolutely sure that the operating voltage for any string does not exceed the open-circuit voltage for any other string (when the strings are mismatched), as per the label on the solar panels. I'm saying this a second time because it is important. -- * The BACKHAUL wiring is the wire that goes out of the combiner box through the large breaker and goes into your charge controller or hybrid solar inverter or whatever. You have to make sure that the backhaul wiring can handle the total combined worst-case current from the combiner. Typically this is going to be in the 15-25A range. Using 10 AWG wire for your backhaul is always a good idea because you will reduce losses through the cable. High quality solar cabling is typically 6mm^2 which is actually a bit better than 10 AWG (it's more like 9 AWG). * Make sure the MC4 connectors are rated for the current being carried. This is typically not an issue for each individual string (because the current is only 5A or 10A), but it can be an issue if you are using MC4 connectors on the backhaul cabling where the total current can be far more. Once the array is operating, on a good sunny day hand-feel the MC4 connectors on the backhaul (if any) to make sure they aren't hot. * Generally more voltage and less current is better, you get far lower losses that way, but you have to make sure that the open-circuit voltage of the strings does not exceed the specifications for the charger controller that you are backhauling into. -- * Now for voltage, that is mostly a function of the charge controllers your are feeding into. Make sure that voltages, particularly the open-circuit voltage of the strings, is compatible with your charge controller. * Charge controllers are not usually limited by the input current from the combiner box because most people use panel geometries that add voltage before combining the strings in parallel. Instead, most charge controllers are limited by their output current, which is generally a function of the battery voltage they are feeding into. * I strongly recommend using Victron charge controllers, which are 97% efficient, whenever possible. Victron has two reasonably-priced charge controllers, the MPPT 75-15 (max 75V in, roughly 10-30V out) and the MPPT 100-20 (max 100V in, roughly 10-60V out). 15A or 20A output current, max. These charge controllers need BATVOLTAGE + 5V coming into it from the combiner box in order to start. This is not usually a problem since you will be putting panels in series to create higher voltage strings anyway if you are smart. * Have fun! I am! I have three of these babies.

### ⭐⭐⭐⭐⭐ Great enclosure
*by J***N on October 6, 2023*

This seems like a great enclosure that is well wired and easy to mount. I mounted it outdoors at the panels so we shall see if it holds up to the outside environment. I only needed a 2 string enclosure, but this gives me room to expand. I only wish that they had included caps or plugs for entry points that were not being used. The wiring was neatly done and the external mounting tabs worked well without requiring penetrating the case's waterproof integrity. A gasket rests in the cover groove to ensure the waterproofing. I do wish that the breakers had individual switches for each solar string. There is only a master switch for the entire enclosure, but it works well for my small installation.

### ⭐⭐⭐⭐⭐ Well made, feels sturdy
*by A***R on May 18, 2025*

Got this to go with the ecoworthy black friday deal from last year. I've seen a few rough stories in the reviews but so far I've been one of the lucky ones. Everything I've purchased from Eco-Worthy has been well made, well packaged, and just great construction. I only tinker with solar and dont really know much about it. But I do know what a well built item looks like, and this is it. Very happy, but if things go sideways I'll update my review.

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-28*