If you are wiring multiple solar panel strings into one point before the inverter, the combiner box is the safety and organization hub of a charge controllers solar BOS setup. The four models here are all new, steel-case IP65 enclosures, but they split into 4-string and 6-string layouts, with listed prices spanning USD 78.84 to USD 99.90. The practical question is not just which one is cheapest, but which string count, breaker rating, and physical envelope matches the array you actually have.
Quick take
All four boxes are designed to consolidate PV string wiring in a protected steel housing. The 4-string SPD model is the entry point of the range. The VEVOR 6-string 15A sits at the top of the listed range. Two Uimoso units fill the middle: one 6-string 10A model and one 6-string 15A model.
Listed price comparison
| Product | Listed Price | Price Bar |
|---|---|---|
| Solar PV Combiner Box 6 String 10A for Solar Panel System Steel Case IP65 | USD 85.99 | |
| VEVOR Solar PV Combiner Box 6 String 15A for Solar Panel System Steel Case IP65 | USD 99.90 | |
| Solar PV Combiner Box 4 String 15A for Solar Panel System Steel Case IP65 SPD | USD 78.84 | |
| Solar PV Combiner Box 6 String 15A for Solar Panel System Steel Case IP65 | USD 95.99 |
Decision matrix
- Need four inputs and the lowest listed cost? The 4-string SPD model is the natural starting point.
- Want six inputs with the VEVOR name? The VEVOR 6-string 15A carries the highest listed price.
- Prefer a 6-string layout with a 125A breaker and a Uimoso body? The Uimoso 6-string 15A fits that profile.
- Have a six-string array running at a more conservative current level? The 6-string 10A model keeps the string count without moving up to the 15A tier.
Solar PV Combiner Box 6 String 10A for Solar Panel System Steel Case IP65
Starting with the 6-string 10A model, this Uimoso steel box is listed at USD 85.99 and uses a 63A 2P DC500V circuit breaker. The enclosure comes in the RAL7035 grey-white finish with a detachable, powder-coated cold rolled steel mounting plate and a keyed rotary lock. Give it consideration when your array needs six inputs but your per-string wiring is modest; the model name and description point to a 10A current level. The limitation is the price step: it sits above the 4-string SPD box despite offering the same six-string physical layout as the other Uimoso unit. If you need only four strings, the 4-string route is the lower listed cost.
VEVOR Solar PV Combiner Box 6 String 15A for Solar Panel System Steel Case IP65
VEVOR's 6-string 15A combiner carries the highest price in this set at USD 99.90. Its listed attributes include a rotary lock opening, DC 15A/500V fuse holders, six inputs, a detachable mounting plate, and an 8.55 lb net weight. That puts it in the same string-count and fuse-current neighborhood as the other 15A six-string unit, but with the VEVOR name on the enclosure. Choose it if the VEVOR label is important to you and you are willing to set aside the highest listed amount. The limitation is that the other Uimoso six-string 15A is listed at a lower price, leaving USD 3.91 in your pocket if the brand name does not matter.
Solar PV Combiner Box 4 String 15A for Solar Panel System Steel Case IP65 SPD
The 4-string 15A SPD unit is the entry price in this comparison. It has a 125A circuit breaker, four inputs, and a steel enclosure listed at 10.8 x 11.8 x 6.1 inches. The title includes an SPD designation, which may matter if you want that feature marked on the box. The tradeoff is physical mass: the 12.23 lb net weight and the larger listed footprint may be more enclosure than you need if space is tight. For a true four-string setup at the lowest listed cost, this is the natural starting point.
Solar PV Combiner Box 6 String 15A for Solar Panel System Steel Case IP65
The last option is the Uimoso 6-string 15A at USD 95.99. It shares the 280 x 250 x 100 mm steel dimensions of the 10A six-string model, but pairs them with a 125A 2P DC500V breaker and a title-level 15A rating. The rotary lock opening matches the VEVOR, and the detachable powder-coated mounting plate is included. That makes it a slightly lower-priced way to get six 15A strings and a 125A breaker compared with the VEVOR box. Its limitation is the price gap upward from the 4-string: if your array only has four strings, you are paying for two unused inputs.
Final recommendation by use case
If your array is four strings and you want the lowest listed price, start with the 4-string 15A SPD. If you need six inputs and prefer the VEVOR label, the VEVOR 6-string is the top-priced choice that gives you that name plus 15A fuse holders. If you want six inputs with a 125A breaker and a Uimoso body, the Uimoso 6-string 15A is the balanced pick. And if your six-string system runs at a more conservative current level, the 6-string 10A model with its 63A breaker keeps the hardware match closer to your spec.
