Quick Verdict
When you're putting together the balance-of-system parts for a small solar array, these two 4-string combiner boxes are close competitors. The 4String Solar PV Combiner Box 63A Circuit Breaker Solar Panel System Waterproof is the one to choose for outdoor, weather-exposed installs because it carries an IP65 waterproof rating. The Solar Combiner Box PV Combiner 63A Circuit Breaker 4 String For Solar Panel Kit is the one that calls out a high-voltage lightning arrester, making it a solid option for storm-prone areas or if you want that protection explicitly stated. The core specs are nearly identical, so your choice comes down to weather sealing versus lightning-arrester clarity.
At a Glance
| Product | Price |
|---|---|
| 4String Solar PV Combiner Box 63A Circuit Breaker Solar Panel System Waterproof | $61.91 |
| Solar Combiner Box PV Combiner 63A Circuit Breaker 4 String For Solar Panel Kit | $62.54 |
Where Each Product Wins
The 4String Solar PV Combiner Box wins for outdoor, wall-mounted installations. It's the option with a waterproof rating, and it comes with mounting plates in the package, so you can attach it to a wall or rack without buying extra brackets. If your system lives outside, this is the more weather-ready pick.
The Solar Combiner Box PV Combiner wins for setups where you want a high-voltage lightning arrester as a clearly stated component. That extra surge protection is a defined part of this box's build, which can be reassuring if lightning strikes are common in your area or if an inspector asks for that detail.
Product Notes
4String Solar PV Combiner Box 63A Circuit Breaker Solar Panel System Waterproof
The 4String Solar PV Combiner Box arrives with a combination lock and four mounting plates, so the mounting hardware is included. It accepts up to 1000V per string and combines four strings into one output, which is a typical layout for a small-scale solar array. The operating temperature range of -30~70℃ covers most climates, but if your location routinely drops below that, you'll need to look for a box with a wider range. For an outdoor install where you want the mounting hardware included, this one fits the bill.
Solar Combiner Box PV Combiner 63A Circuit Breaker 4 String For Solar Panel Kit
The Solar Combiner Box PV Combiner is built from ABS and PC, which gives it solid insulation and impact resistance. The specs specifically mention a 10A rated current fuse per string, a useful detail when you're determining wire sizes. It also describes stable performance and high quality, and it uses natural cooling, so there are no fans or moving parts to maintain. The downside is the price: at $62.54, it's the more expensive of the two, though the gap is less than a dollar. If that small extra cost isn't a concern, it's a clean, straightforward combiner.
Final Choice by Use Case
If your combiner box will be mounted outside and exposed to the elements, go with the 4String Solar PV Combiner Box, which includes the mounting plates you'll need. If your installation is sheltered or you want the component list to be explicit, the Solar Combiner Box PV Combiner is worth the small extra outlay.
