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ACDB, DCDB and AJBs 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 the power fluctuate and electricity surge flows through these distribution boards.

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

ACDB DCDB Banner
ACDB DCDB Banner

ACDB, DCDB/AJBs 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 & AJB boxes are and how these small solar protection devices can protect your appliances from damage caused by short circuits.

Solar ACDB 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.

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 6kW, while three phase ACDB is used in higher capacity solar systems.

Price List of ACDB

The price of ACDB is determined by its model, capacity, solar brand and many other factors. However, the prices of solar ACDBs are given below.

ACDB ModelSelling PriceBuy It Now
32AMP 320V Single Phase ACDBRs. 1,750
32AMP 320V Three Phase ACDBRs. 3,699
63AMP 320V Three Phase ACDBRs. 4,269
  • (Inclusive of all taxes) Prices can vary ± 3% to 5% depending on location, promotions and availability, and solar brand.
  • Check our Online Solar Shop or Amazon Store for latest price and stock availability.

Specifications of ACDB

ACDB (alternative current distribution box) comes with many specificationsand high quality components. The specifications of above mentioned ACDB are mentioned below.

ACDB ModelDescription

32AMP 320V Single Phase ACDB

  • MCB – 32A 2 Pole
  • SPD – 320V 2 Pole
  • Suitability – 1kW to 6kW Solar System

32AMP 320V Three Phase ACDB

  • MCB – 32A 4 Pole
  • SPD – 320V 4 Pole
  • Suitability – 7kW to 14kW Solar System

63AMP 320V Three Phase ACDB

  • MCB – 63A 4 Pole
  • SPD – 320V 4 Pole
  • Suitability – 14kW to 25kW Solar System
  • These specifications and components can be customize as per load or one’s requirement.

Solar DCDB Box

DCDB is also known as Array Junction Box (AJB). It is a small solar protection 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 melt and protect the equipment of the solar system from being damage.

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. 

DCDB 1 in 1 out side
DCDB 1 in 1 out side

Price List of DCDB

The prices of DCDB depends upon its model and solar brand. However, we are providing best possible prices for DCDB below.

DCDB ModelSelling Price Buy It Now
1 IN 1 OUT 600V DCDBRs. 1,609
1 IN 1 OUT 1000V DCDBRs. 2,180
2 IN 2 OUT DCDB With 600V x 1 SPDRs. 2,270      Contact for buy 
2 IN 2 OUT DCDB With 600V x 2 SPDRs. 2,840
2 IN 2 OUT DCDB With 600V x 2 SPD + 2 MCBRs. 3,749
2 IN 2 OUT DCDB With 1000V x 1 SPDRs. 4.849
2 IN 2 OUT DCDB With 1000V x 2 SPDRs. 4,849
2 IN 2 OUT DCDB With 1000V x 2 SPD + 2 MCBRs. 6,449
3 IN 3 OUT DCDB With 1000V x 1 SPDRs. 3,739
3 IN 3 OUT DCDB With 1000V x 2 SPDRs. 5,605
3 IN 3 OUT DCDB With 1000V x 3 SPDRs. 6,850
  • (Inclusive of all taxes) Prices can vary ± 3% to 5% depending on location, promotions and availability, and solar brand.

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 componenets. You can check its detailed specifications below.

DCDB ModelDescription

1 IN 1 OUT 600V DCDB

  • SPD – 600V 2 Pole (1 Nos.)
  • DC Fuse with Fuse Holder (1 Nos.)
  • Suitability – Upto 12 Solar Panels

2 IN 2 OUT DCDB With 600V x 2 SPD

  • SPD – 600V 2 Pole (2 Nos.)
  • DC Fuse with Fuse Holder (2 Nos.)
  • Suitability – Upto 24 Solar Panels

2 IN 2 OUT DCDB With 1000V x 2 SPD

  • SPD – 1000V 3 Pole (2 Nos.)
  • DC Fuse with Fuse Holder (2 Nos.)
  • Suitability – Upto 40 Solar Panels
  • These specifications and components can be customize as per load, site condition or one’s requirement.

Solar AJB Box

An array junction box (AJB), also known as solar PV combiner box is a type of electrical junction box that is used to connect the solar panel strings in parallel. It also protects the panels from reverse current flow.

Simply put, an AJB combines all the incoming wires from the solar panel strings and derives a single common string output for all those multiple array inputs. This combined DC power is then sent to the solar inverter to be converted into AC.

AJBs are an important component of solar systems and Kenbrook Solar offers a complete range of AJBs that are suitable for solar systems of various capacities. The AJB can be customized for different configurations, depending on the number of strings of solar panel modules or the needs of the customer.

Price List of AJB

If you’re considering installing an array junction box for your solar system, it’s important to know what types of junction boxes are available and how much they cost.

We are offering high quality components with an AJB at very reasonable prices. Look below to find the best deals on solar AJB.

DCDB Model Selling Price Buy It Now
2 IN 1 OUT 600V AJB Rs. 2,080
2 IN 1 OUT 1000V AJB Rs. 2,649
3 IN 1 OUT 600V AJB Rs. 2,269
3 IN 1 OUT 600V/20A AJB With 32A MCB Rs. 2,839
3 IN 1 OUT 1000V AJB Rs. 2,939
3 IN 1 OUT 1000V/30A AJB With 63A MCB Rs. 3,979
4 IN 1 OUT 600V AJB Rs. 2,559
4 IN 1 OUT 1000V AJB Rs. 3,499
5 IN 1 OUT 600V AJB Rs. 2,839
5 IN 1 OUT 1000V AJB Rs. 4,400
6 IN 1 OUT 600V AJB Rs. 3,129
6 IN 1 OUT 1000V AJB Rs. 3,120
7 IN 1 OUT 1000V AJB Rs. 5,140
  • (Inclusive of all taxes) Prices can vary ± 3% to 5% depending on location, promotions and availability, and solar brand.

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 a combiner/junction box. It combines and 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 & DCDB will be Rs.1,635 (each).

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.