Choosing a combiner box for a 4-string solar panel system is a safety decision: it groups the panel outputs, protects each string with a fuse or breaker, and passes the combined current to the charge controller. When two 4-string combiner boxes arrive at the same listed price, the useful decision starts with the details each listing provides. The NaMaSyo 4 String Solar Combiner Box and the Solar Combiner Box PV Combiner 63A Circuit Breaker 4 String both give you four inputs and a 63A breaker, but the supporting hardware and spec clarity differ.
Quick verdict
Both boxes offer four input strings, a 63A/550V circuit breaker, and two surge protection devices. The NaMaSyo version spells out IP65 protection, a -30 to 70°C operating range, and includes a combination lock plus four mounting plates in the package. The other version emphasizes ABS/PC material durability, a high-voltage lightning arrester, and the same core breaker specs. If you plan to wall-mount and want the mounting hardware right in the box, the NaMaSyo is the easier call. If you just need a functional 4-string combiner with the 63A breaker, the second listing is a direct alternative.
Comparison at a glance
| Product | Listed Price | Key Specs |
|---|---|---|
| 4 String Solar Combiner Box PV Combiner Circuit Breaker 63A For Solar Panel Kit (NaMaSyo) | USD 62.54 | 4 strings, 63A/550V breaker, 2 surge protectors, IP65, combo lock + mounting plates |
| Solar Combiner Box PV Combiner 63A Circuit Breaker 4 String For Solar Panel Kit | USD 62.54 | 4 strings, 63A/550V breaker, 2 surge protectors, ABS/PC housing, lightning arrester |
Where each product stands out
NaMaSyo 4 String Solar Combiner Box
The NaMaSyo listing gives a more complete set of environmental specs. With IP65 protection, the -30 to 70°C range, and a 1000V max input per string, it is easier to judge for outdoor panel wiring. The combined 40A input and 10A per-string limit are clearly stated, and the package includes a combination lock and four mounting plates. Those extras make this the better choice when you need to mount the box securely on a wall.
Solar Combiner Box PV Combiner 63A Circuit Breaker 4 String
This listing focuses on the case and protection: high-quality ABS and PC, a high-voltage lightning arrester, and two surge protection devices. It also holds the same 63A/550V circuit breaker and four 10A-rated string fuses. For an installation where the mounting hardware is already in place, the straightforward specification set still covers the main job of combining four PV strings into one output.
Product notes
4 String Solar Combiner Box PV Combiner Circuit Breaker 63A For Solar Panel Kit
The NaMaSyo option is the more detailed of the two. It lists IP65 protection, -30 to 70°C operation, and a 1000V max input per PV string. The package includes a combination lock, four mounting plates, and the combiner box itself. The 10A per-string input is worth checking against your panel specs, because larger panels may exceed that current. If you're putting the box on a wall and want the mounting hardware included, this is the version to start with.
Solar Combiner Box PV Combiner 63A Circuit Breaker 4 String For Solar Panel Kit
This listing highlights the ABS and PC shell, a high-voltage lightning arrester, and two surge protection devices. The 63A/550V circuit breaker and four 10A-rated fuses mirror the core specs of the NaMaSyo box. It's a sound fallback if you already have mounting hardware and don't need the extra package pieces. The 10A per-string fuse remains the current ceiling, so confirm your panels stay under that limit before wiring.
Final choice by use case
If you want the combiner box with the fuller spec sheet and the included lock and mounting plates, choose the NaMaSyo 4 String Solar Combiner Box. If you just need a 4-string/63A combiner with a sturdy ABS/PC enclosure and a lightning arrester, the Solar Combiner Box PV Combiner 63A Circuit Breaker 4 String gets the job done as a straightforward alternative.
