Demin Power
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1. In the solar power system, in order to decrease the connecting line, easy maintenance, reduce losses, optimize system structure, improving the safety and reliability of items, the PV combiner box is usually in need between the solar panels and inverter.
2. Except the PV junction function, the pv combiner box should also have reverse current prevention, over-current protection, over-voltage protection, lightning protection etc a series of perfect protection functions, meanwhile, checking the running state, current, voltage and power after junction, arrester state, collection of DC circuit breaker state and Arc detection, leakage detection(optional) and so on.
3. The PV combiner box is equipped with all the functions mentioned above, configuration with on grid/off grid solar inverter to make up a complete set of solar power system.
4. When choose the pv combiner box, based on the input dc voltage range and output power of inverter, certain qty of panels will be connected in series as a string, certain strings in parallel will connect to the PV combiner box for junction, via control of circuit breaker and protection of arrester, then feed to the inverter.
| Model | DM-CB3s | |
| Basic Parameters | ||
| Max.PV Array Voltage | 500V | 1200V |
| Max. PV Array parallel Inputs | 3 | |
| Rated fuse current (replaceable) | 10A/15A | |
| Allowable input current | 10A | |
| Output Circuit Breaker | 50A | |
| Max. Output current | 30A | |
| PV dedicated SPD | Yes | |
| IP Rating | IP65 | |
| Size (mm) | 260*230*110mm | 320*220*110mm |
| Weight | 2KG | 2.7KG |
| Environment | ||
| Normal working temperature/humidity |
-25°C to 70°C, humidity 95% No Condensation, No corrosive gas |
|
| Altitude (m) | < 2000m | |
As our corporate users, you enjoy the following services and warranty policies:
*When confirming equipment failure, please promptly reach out with the equipment model and a complete description of the problem.
What is the primary function of a PV combiner box?
A PV combiner box consolidates multiple strings of solar panels into a single output that feeds into the inverter. This minimizes wiring complexity, reduces power transmission losses, and provides essential overcurrent and surge protection for the system.
Does this combiner box support both on-grid and off-grid solar systems?
Yes, this PV combiner box is designed to configured with both on-grid and off-grid solar inverters, making it suitable for a complete set of solar power configurations.
What kind of protective devices are integrated inside the box?
It features high-voltage fuse protection and anti-connection protection for each string, a dedicated PV high-voltage surge protective device (SPD/arrester), and a high-voltage circuit breaker (DC1200V) to control and secure the output circuit.
Can this combiner box be installed in outdoor environments?
Absolutely. The PV combiner box features an IP65 protection rating, which makes it dust-tight and resistant to water jets, ensuring reliable operation for outdoor installation.
What parameters are monitored or communicated by this combiner box?
It features an isolated RS485 communication port using the MODBUS-RTU protocol. It can check real-time parameters such as running state, current, voltage, power after junction, arrester status, and circuit breaker status, and supports built-in arc and leakage detection features.
How does the built-in arc detection prevent fire hazards?
The box continuously monitors for harmful arcs in the DC circuit. If an arc fault is detected, the built-in alarm triggers a trip switch immediately to cut off the faulty circuit, preventing potential fire disasters before they occur.
