Choosing a combiner box for a charge controllers solar BOS setup comes down to more than picking the lower listed price. The key question is whether the named string configuration, circuit-breaker specification, enclosure dimensions, and enclosure details suit the components you are planning around.
Quick verdict
Both models are new steel-case IP65 Solar PV combiner boxes with rotary lock opening. The Solar PV Combiner Box 6 String 10A for Solar Panel System Steel Case IP65 is the direct pick for a six-string designation and specifies a 63A 2P DC500V circuit breaker. The Solar PV Combiner Box 4 String 15A for Solar Panel System Steel Case IP65 SPD has a four-string format, a 125A main circuit breaker, and the lower listed price. The $7.15 gap is worth considering, but the named configuration should lead the decision.
Price and specification comparison
| Detail | 6-String Solar PV Combiner Box | 4-String Solar PV Combiner Box |
|---|---|---|
| Configuration named in title | 6 String | 4 String |
| Circuit breaker | 63A 2P DC500V | 125A main circuit breaker |
| Listed dimensions | 11.02 x 9.84 x 3.94 in | 10.8 x 11.8 x 6.1 in |
| Listed price | USD 85.99 | USD 78.84 |
Where each Solar PV combiner box wins
The 6-String Solar PV Combiner Box wins on configuration count. If six strings are the non-negotiable part of your component plan, its title states that configuration directly. Its listed dimensions are also notably shallower at 3.94 inches, which gives shoppers a specific measurement to compare against available enclosure space.
The 4-String Solar PV Combiner Box wins on listed price. At USD 78.84, it is $7.15 below the six-string model. That makes it the more economical listed choice when a four-string arrangement is the intended format. Its 125A main circuit breaker is another clearly named specification for shoppers who are comparing breaker ratings.
Product notes
6-String Solar PV Combiner Box
Pick the Solar PV Combiner Box 6 String 10A for Solar Panel System Steel Case IP65 when a key-operated rotary lock and a detachable powder-coated cold rolled steel mounting plate are priorities in the enclosure details. The RAL7035 Grey-White color gives this model a defined finish, while the steel-case IP65 wording keeps the product description focused on its enclosure format. A meaningful limitation is its specified 63A 2P DC500V circuit breaker: shoppers seeking the 125A main breaker named for the other model will not get that specification here. This is the more targeted choice when the detachable plate and its particular breaker designation matter most.
4-String Solar PV Combiner Box
The Solar PV Combiner Box 4 String 15A for Solar Panel System Steel Case IP65 SPD is a sensible choice when the stated 0.8 mm cold rolled steel material and 12.23 lb net weight are useful comparison points, alongside its rotary lock opening. Its description also names four 15A DC fuse holders, adding a clear component detail beyond the main breaker. Its key limitation is the four-string format rather than the six-string designation of the other model. Choose this model for an explicitly named four-string layout and the 125A main circuit breaker, rather than expecting it to mirror the other enclosure's configuration.
Final choice by use case
Select the Uimoso Solar PV Combiner Box when the detachable mounting plate, Grey-White finish, and 63A 2P DC500V breaker match the enclosure details you want to prioritize. Select the Solar PV Combiner Box measuring 10.8 x 11.8 x 6.1 inches when that stated size, the 125A main breaker, and the lower USD 78.84 listed price are the more relevant decision points.
