ACDB and DCDB are power distribution cum safety circuit boxes that prevent our appliances and solar components from short circuiting and high voltages. They act as circuit breakers when there is extreme fluctuation in energy and increased electricity surge flows through the wires and these distribution boards. 

These boxes are installed inside the premises to control and supply the electricity to various electrical appliances. DCDB is installed between the solar panel and solar inverter, while ACDB is installed after the solar inverter but before the connected load.

Solar ACDB & DCDB Boxes
Solar ACDB & DCDB Boxes

ACDB and DCDB are a crucial part of the solar system that require special attention. It is often seen that people skip these components to save some money and later this carelessness overwhelms them. So, in this article, we’ll look at what ACDB & DCDB are and how these small solar devices can protect your appliances from damage caused by short circuits.

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#1. AC Distribution Box

The ACDB (Alternative Current Distribution Box) is a small solar device that is installed between the solar inverter and your home load. An ACDB includes necessary surge protection devices (SPD), AC fuse, and MCB to protect the appliances from any type of electrical damage or high voltages. 

ACDB Box
ACDB Box
Solar ACDB Distribution Box Diagram
Solar ACDB Distribution Box Diagram

It receives the AC power from the solar inverter and directs it to AC loads through the distribution board. The AC fuse inside the box will melt and break the circuit in case of high voltage or excess electricity supply. It prevents your appliances from being damaged. Single phase ACDB is used in solar systems with capacities up to 3kW, while three phase ACDB is used in higher capacity solar systems.

Specifications of ACDB

ACDB (alternative current distribution box) comes with many specifications. The specifications of ACDB may change as per load or inverter capacity. Its detailed specifications are mentioned below.
ParticularsDescription

Ambient

-10 to 60 Degree C

Type of Enclosure

IP66 Polycarbonate Material

Inputs/Outputs

Single Phase ACDB, 3 Phase DCDB

AC Switching

MCCB/MCB Based AC Disconnection

Surge Protection

AC SPD Type 2

Box / Top Cover

Opaque/Transparent

#2. Price List of ACDB 2021

The price of ACDB is determined by its model, capacity, solar brand and many other factors. However, the prices start from Rs.4,000 for 1kW solar system and go up to Rs.5,000 for 10kW solar system.
ACDB ModelSelling Price

1 kW ACD Box – 1P

Rs.4,000

2 kW ACD Box – 1P

Rs.4,000

3 kW ACD Box – 1P

Rs.4,000

5 kW ACD Box – 1P

Rs.5,000

5 kW ACD Box – 3P

Rs.5,000

10 kW ACD Box – 3P

Rs.5,000

  •  (Inclusive of all taxes) Prices can vary ± 10% to 12% depending on location, promotions and availability, and solar brand.
  • Prices are exclusive of Govt. Subsidy, as the subsidy on solar systems depends on your eligibility and types of solar system.
  • Check our Online Solar Shop or Amazon Store for the latest price and stock availability.

#3. DC Distribution Box

DCDB is also known as Array Junction Box (AJB). It is a small solar device that is installed between solar panel and a solar inverter. If any disturbance occurs from the side of the solar panel, the DC fuse inside the DCDB will be melted and protect the equipment of the solar system and prevent them from being damaged.

DCDB Box
DCDB Box
Array Junction Box DCDB Diagram
Array Junction Box DCDB Diagram

The primary function of DCDB is to protect solar panels and solar inverters by controlling the voltage and DC power supply from the solar panel. Like an ACDB, it also includes necessary surge protection devices (SPD), DC MCB, and DC fuses. 

Specifications of DCDB

In recent years, the specifications of DCDB like weight, material, and adaptability have seen a lot of development. Now it comes with many great features. You can check its detailed specifications below.

These specifications of DCDB may change as per solar panel, number of strings and as per site conditions.

ParticularsDescription

Ambient

-10 to 60 Degree C

Type of Enclosure

IP66 Polycarbonate Material

Inputs/Outputs

1 in 1 Out, 2 in 2 Out, 3 in 3 Out, 4 in 4 Out

DC Switching

600/1000/1500VDC Disconnection

Surge Protection

DC SPD Type 2, Fuse with or without Indications

Box / Top Cover

Opaque/Transparent

#4. Price List of DCDB 2021

The prices of DCDB depends upon its power rating and solar brand. These prices start from Rs.4,500 for 1kW solar system and goes up to Rs.7,500 for 10kW solar system. You can see the complete price list of DCDB below.
DCDB ModelSelling Price

1 kW DCD Box – 1P

Rs.4,500

2 kW DCD Box – 1P

Rs.4,500

3 kW DCD Box – 1P

Rs.4,500

5 kW DCD Box – 1P

Rs.7,500

5 kW DCD Box – 3P

Rs.7,500

10 kW DCD Box – 3P

Rs.7,500

  •  (Inclusive of all taxes) Prices can vary ± 10% to 12% depending on location, promotions and availability, and solar brand.
  • Prices are exclusive of Govt. Subsidy, as the subsidy on solar systems depends on your eligibility and types of solar system.
  • Check our Online Solar Shop or Amazon Store for the latest price and stock availability.

Frequently Asked Question

ACDB is alternative current distribution box. Basically it is a safety equipment in solar system which prevent solar inverter from heavy voltages. It installed between solar inverter and the load.

AJB (array junction box) is also known as DCDB (direct current distribution box). It controls the DC power generated by solar panel and protect them from any kind of electrical damage.

ACDB and DCDB both are safety equipment in solar system. It prevent solar panelsolar invertersolar battery and connected load as well. Therefore you should install ACDB DCDB box.

For safety purpose, it is necessary to install ACDB and DCDB boxes along with a solar system. Otherwise there will always be a risk of uncertainty.

For 3KW solar system, the cost of ACDB will be Rs.4,000 and Rs.4,500 for DCDB.

ACDB box will be installed at any dry and safe place between solar inverter and electrical load. While DCDB installed between solar panel and solar inverter.

If you are purchasing a complete solar system, than it will come under its accessory. But if needed than you can also buy it separately.

Yes, ACDB and DCDB boxes are different from each other. ACDB operates AC current while DCDB operated DC current.

It is a technical work. So if you know how to connect the circuits with equipment then you can install it yourself. Otherwise you need to hire an electrician or solar expert for the installation.

In ACDB, there are surge protection device (SPD) & MCCB and in DCDB, there are surge protection device (SPD) & fuses. You can identify ACDB DCDB by checking them.

Yes, there is 5 year warranty on ACDB and DCDB boxes.

For buying ACDB and DCDB boxes in any capacity, you can contact us.

 

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✍️ Written by: Hari Sharan & Updated On: 23/11/2021 By: Bhanwar Chauhan

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