Best 5 Solar Combiner Boxes for Your Consideration

Solar combiner boxes are compact boxes that encompass the wiring and assembly of the essential components of a PV system. Their purpose is to improve the safety of solar panels and the entire photovoltaic plant.

The combiner box is incorporated between the solar modules and the inverter. Regarding combiner boxes, little maintenance is enough to ensure their durability. 

However, it is important to note that there is a wide range of combiner boxes available online and offline, and choosing the optimal one is not easy. So to help you with choosing the best, here is a list of some of the best and top-notch combiner boxes manufactured by the finest combiner box manufacturers:

ECO LLC 4 String PV Combiner Box

The ECO LLC 4 String Box is designed to hold four strings. Because they are non-conductive, the combiner boxes are touch-safe. They are equipped with anti-backflow diodes to prevent power from flowing back from the battery to the panels. However, combiner boxes feature high-voltage fuses to safeguard against overvoltage, overcharge, and overcurrent.

A surge/lightning arrestor module with a 1000-v rating is also included with the ECO LLC Box. Therefore, clients can relax knowing they won’t suffer any harm from lightning strikes or unexpected power surges.

The ECO LLC Box fits into place rather easily. Even though it has some weather protection, you should mount it where it will receive little to no sun, rain, or water exposure.

Pros:

• The highest input and output voltages are impressive.
• The highest DC output is also respectable.
• It can handle up to 4 strings.
• It has numerous safety measures.

Cons:

• It is not weatherproof.

Midnite Solar Combiner Box Mnpv6-250

The Midnite Solar Combiner Box Mnpv6-250 is a tiny combiner box that assures long-term durability. The MidNite Solar MNPV6-250 Combiner can house five 9A, 90V circuit breakers for a solar power system. It can also handle up to 63 amps with 150V and 50 amps with 300V breakers.

Three breakers have input on the combiner box. However, these are not included in the deal and must be purchased individually.

The box is simple to install because it weighs only 4.4 pounds, making it simple to install and relocate. Furthermore, because of its metal box and plastic interior, it is corrosion-resistant and rain-proof.

Pros:

• The custom combiner box is portable and lightweight.
• It is simple to install and transport.
• It resists corrosion and is waterproof.
• It is compatible with two different inverters and chargers.

Cons:

• The bundle does not contain The Breakers.
• It can’t handle more than 300 Vdc.

ENZPOWER IP66 Solar System Box

The ENZPOWER IP66 Solar System Box includes cutting-edge features that guarantee security and effective operation. Solar Switches offer a thorough isolation switch designed with safety in mind. This solar disconnect switch range is pad-lockable and available in standalone and enclosed forms, making it perfect for any electrical isolation requirements, including repair, maintenance, installation, and inspection.

In addition, there is the load-breaking component, which enables the solar lighting system to be safely disconnected while being broken and loaded.

The ENZPOWER IP66 Solar System Box is perfect for an off-grid system and is used to install between the solar panel and the solar charge controller as well as between the solar panel and the inverter. It is small, lightweight (1.73 pounds), and simple to install.

Pros:

• Offers the best level of water resistance.
• Offers top-notch security features.
• Installing it is simple
• It is portable and lightweight.

Cons:

• It only supports one string

AIMS POWER Com3in60A Solar Panels Combiner Box

The AIMS POWER Com3in60A Solar Panels Combiner Box offers well-organized housing and versatile mounting choices. You can set it up on just about any surface because of this. Furthermore, the producer of this 1000V combiner box employed a strong housing that ensures the internal components remain protected, so extreme temperatures and humidity are not an issue.

According to performance testing, this combiner box has an output current of 60A and 1000 Vdc input. The 125A output breaker also reduces the possibility of unplanned short circuits. Replaceable fuses are also included in the kit. 

With lightning and ground protection, the AIMS POWER Com3in60A Solar Panels Combiner Box is ready to use. Thunderstorms are not a concern because it is also waterproof. A tamper-proof lock is another characteristic that is not frequently used. That and a ten-year warranty are included with this combiner box.

Pros:

• An enclosure that is waterproof and has numerous mounting options
• Comes with a tamper-evident lock
• Is appropriate for a large-capacity system
• Offers Protection from overvoltage, short circuits, and lightning
• Can be easily installed
• Ideal for an off-grid setup
• There’s no requirement to purchase disconnect switches, breakers, or connectors.

Cons:

• The heavy combiner box.

AFCI COMBINER BOX BHSZ

The Arc Fault Circuit Interruption Combiner Boxes monitor each string’s currents, voltages, and temperature in the enclosure. The integrated mechanical contactors are triggered when an arc fault is detected, ensuring the safety of the solar PV system.

The manufacturer, Beny automates production using the most up-to-date tools for electrical manufacturing. They have exceptional production speed to complete large orders while ensuring that PV protection devices work as intended. 

DC contactors have a working life of up to 10,000 cycles and can be remotely managed for simpler system maintenance. According to its performance, this combiner box has an output current of 100A, 125A, or 250A and an input voltage of 600VDC or 1000VDC. Additionally, through the efficient production of high-quality PV protection solutions, BENY Electric can offer comprehensive and dependable solar circuit shielding for all photovoltaic systems.

Because they are non-conductive, the combiner boxes are touch-safe. Additionally, finger-safe touch fuse holders for the positive and negative poles are included in combiner boxes for overvoltage, overcharge, and overcurrent protection.

Pros:

• Every DC component has a UL listing.
• Consists 8, 12, 18, 20 strings input
• DC contactors up to 300A
• Negative and positive poles of the finger-safe touch fuse holder
• Can support 600 or 1000VDC

Cons:

• Handling more than 1000 VDC could be a little overwhelming.

Conclusion

With the recommended mentions above, we hope we were able to guide you in choosing the best combiner box. The role of combiner boxes is imminent when it comes to the smooth functioning of solar panels, so it is essential to invest in high-quality and durable combiner boxes curated by reliable solar combiner box manufacturers.

Beny is one of the prominent string combiner box manufacturers with over 30 years of experience in manufacturing protective components for photovoltaic systems. Aside from the above list, you can also visit Beny to view a wide range of top-notch solar combiner boxes.