When you're shopping for solar BOS components, the DC combiner box is the part that pulls panel strings together and protects the inverter. These two 600V models look nearly identical on paper, so the real decision comes down to price and the specifics each product spells out.
Quick verdict
If you want the core protection of a five-circuit, single-phase 600V combiner and don't need an explicit 2-in/1-out label, the 600V Solar DC PV Combiner Box is the sensible pick. It lists the same four 15A fuses, lightning arrester, and 600V 63A breaker as the more expensive 600V Solar DC Combiner Box, but it also includes a model number, dimensions, and weight. The more expensive 600V Solar DC Combiner Box is the choice only when the labeled 2-in/1-out configuration matters more than the price difference.
At a glance
| Feature | 600V Solar DC Combiner Box | 600V Solar DC PV Combiner Box |
|---|---|---|
| Price | $103.99 | $74.99 |
| Price indicator | ||
| Circuits | 5 | 5 |
| Phase | Single phase | Single phase |
| Material | Plastic | Plastic |
| Layout | 600V 2in 1out | 2 String |
| Protection | 4x15A fuses, lightning arrester, 600V 63A breaker | 4x15A fuses, lightning arrester, 600V 63A breaker |
Where each product wins
- The 600V Solar DC PV Combiner Box wins on affordability and included physical specs: it costs less and gives you model number, weight, and dimensions.
- The 600V Solar DC Combiner Box wins on layout clarity: its listed size is 600V 2in 1out, which is a specific input/output configuration.
Product notes
600V Solar DC Combiner Box with Lightning Arrester for On/Off Grid Systems
This is the higher-priced model, and it does one thing the other doesn't: it explicitly labels the layout as 600V 2in 1out. If your array needs that exact two-input, one-output configuration, that clarity could be worth the extra money. The box is a five-circuit, single-phase plastic unit with the same core protection package as the cheaper model: four 15A DC fuses, a high-voltage lightning arrester, and a 600V 63A circuit breaker. The limitation is that you're paying more for identical circuit count, phase, material, and protection specs, with only the 2in 1out label as the differentiator. If that label isn't essential, the other model delivers the same protective functionality for less.
600V Solar DC PV Combiner Box, 2 String
The lower-priced option costs less while still giving you five circuits, single-phase operation, and a plastic housing. It also adds useful planning details: a GX216R model number, a 3.19-pound weight, and 9 by 5.1 by 9-inch dimensions. The protection package matches the more expensive box, with four 15A DC fuses, a high-voltage lightning arrester, and a 600V 63A circuit breaker. Choose it when you want the same protective features and don't need the 2in 1out label. The limitation is the trade-off in layout wording: the title says 2 String, not 2in 1out, so the input/output arrangement isn't confirmed as explicitly as it is on the other box.
Final choice by use case
For most installations, the 2-String model is the better use of money. It gives you the same circuit count, phase, material, and protective components, plus a model number and dimensions for planning. Choose the pricier 600V Solar DC Combiner Box only when the explicit 2-in/1out label is a requirement for your project.
