The DC Distribution Box (DCDB) is a vital safety component in a solar PV system. It manages DC power from a single solar string and ensures system protection before feeding power to the inverter.

Designed for small rooftop solar systems in the 1–6 kW range, this 1-in/1-out DCDB provides overcurrent and surge protection, ensuring the longevity and safety of the inverter and other connected equipment. Built to MNRE and DISCOM standards, it is a reliable and compact solution for residential solar installations.

Key Components Included

1. DC SPD – 600V (1 Nos.)

   • Protects the system against lightning surges and transient voltage spikes.

   • Type 2 SPD designed specifically for solar photovoltaic applications.

2. DC Fuse – 20A, 600V (1 Nos.)

   • Provides overcurrent protection for the single solar string.

   • Isolates the circuit in case of a fault to prevent damage to the inverter or wiring.

3. Terminal Blocks / MC4 Connectors (Optional)

   • Ensures safe and secure connections for input and output cables.

   • Facilitates quick installation and service.

4. Weatherproof Enclosure

   • IP65-rated enclosure to withstand rain, dust, and UV exposure.

   • Rugged, powder-coated finish for outdoor durability.

Functional Flow

• Single Solar Input → Passes through 20A DC Fuse →

• Power protected by 600V DC SPD →

• Output safely connected to the inverter.

Applications

• Residential rooftop solar systems (1–6 kW)

• Small commercial or institutional setups

• Grid-tied or hybrid solar systems

• Ideal for net-metered solar installations