EnerTech: Balance of System

Rating 5KW to 300KW
Availability Yes
Switch Gear ACDB with high quality switchgear
Metering Feature ACDB with metering feature
SPD SPD used according requirement type 2/1+2
Design Design/Documentations available
Fuses AJB using latest semiconductor fuses
Cabinet IP-65 cabinet
DC Protection SPD used for DC surge protection
Provided Request DC watt-meter provided on request


Enertech is driven with the objective of enriching customers with clean, reliable and interrupt-free power with the use of both conventional and non-conventional sources of energy. The company began its operation in 1990 with the pursuit of offering and rendering solutions with relation to energy challenges. The company has got a highly skilled technical unit with which it has been able to build up a strong and solid manufacturing setup.

Protection in Load AC side in times of power failures is provided by AC distribution box (ACDB). It comprises of breaker, isolators, current and voltage monitoring, etc. It can provide surge protection besides ensuring optimum protection to the sophisticated electronic equipment.

One of the fundamental functions of the ACDB Box is eliminating the load operation at the immediate PCU O/P end along with providing flexible operation of various loads like general home, office lights or Street lights and optional loads operating optionally.

In big solar PV power plants where a number of inverters are there ACDB is replaced and ACCB is used in its place. ACCB possesses one MCCB for each inverter and a master MCCB at the outgoing part. Virtually, all the features that are present on ACDB are very much there in ACCB’s as well.

ACCBs generally find its use in grid connected/ grid tied / on-grid solar power plants. AJB or the Array Junction Box provides with an estimate of the amount of energy that can be used or withdrawn from that of the solar power plant. In case there is some fault on course of failure in DC side, DCDB/AJB is used for the purpose of protecting the system irrespective of it being Solar Panels or batteries.

It is an integral and significant aspect of the SPV system for it is desirable that there is enough protection in DC side. In order to switch off the system while a fault occurs, there exists an Isolator/Breaker for immediately switching off the system. Also, there exists a meter that gives precise information regarding the current and voltage.

Moreover, it has also got surge protection for saving the system from surges caused owing to fault and/or phenomena such as lightning and others. ACDB has a design life of 25 years and is built for operating in indoor conditions. It can be mounted on a wall as well as there is perfectly a provision for such arrangement.

ACBD’s operating temperature is between -10 to 55 degree Celsius. The AJB (Array Junction Box) also have a design life of 25 years. It’s maximum DC Input is 1000V. Its number of DC Inputs range between 2-16 while the number of DC Output is 1.

The number of terminal blocks is 2 to 34. It’s Operating Condition is between -20 degree to 55 degree Celsius. It can furnish both short-circuit as well as surge protection depending on the requirement. Like ACDB it can be mounted on a wall too.


Array Junction Box Specification
Maximum DC Input 1000V
No. of DC Inputs 2 to 16
No. of DC Outputs 1
Number of Terminal Blocks 2 to 34
Reverse Blocking Diode 1 to 16
Maximum Input Fuse Rating- Type 3/5/10/12/15/20 – Semiconductor
Maximum DC Current (A) 100
Maximum Continuous Current (A) 160
Isolator/MCB 16/32/40/63
Maximum Voltage, VDC 600/1000
+Ve Input wire size, 1C x sqmm 2.5 to 10
-Ve Input wire size, 1C x sqmm 2.5 to 10
Surge Protection Device (SPD) 600/1000V, Class II
Operating Temperature -25° to 55°
Enclosure Type PS/PC
Protection Type/Protection Class IP 65
Cable glands clamping range 12 to 32
Wall Mounting Yes
Bus Bar Yes
Operating Condition -20°C to 55°C
Type of Protection (As per requirement) Short – Circuit, Surge
Design Life 25 Years


ACDB Specifications
Breaker for Input Yes (as per rating)
Breaker for Output Yes (as per rating)
Fuse for UPS Input Yes (as per rating)
Rotary Switch for Bypass Yes (as per rating)
Energy Meter for Load Yes 1Phase/3Phase (2 channel for I/p & O/P)
Surge Protection Device (SPD) MOV / SPD (optional)
Operating Temperature -10 to 55°C
Enclosure Type PS/PC
Protection Type/Protection Class IP 65
Cable glands clamping range Yes
Wall Mounting Yes
Operating Condition Indoor
Design Life 25 years


The DCDB is used to distribute DC power generated by solar panels to the inverter and batteries in the system. EnerTech’s DCDB solutions come with features such as fuses, surge protection devices, and monitoring systems to ensure safe and reliable distribution of power.


Download Specifications of AJB PDF

Download Specifications of ACDB PDF

Download Specifications of DCDB PDF

Request Quote