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Array Junction Box
  Array Junction Box
 array junction box
                                              with string monitoring
                                              module India
                                                      junction box
                                                      PV plant India       



October 2013: Hulasi has provided a 2500A capacity AC combiner [ACCB] panel for a MW scale solar power plant in Rajasthan. Panel is having a 2500A ACB and 10 input MCCBs of 250A each.
Hanut India : Solar PV array junction boxes

October 2010: Hulasi offers enclosures and integrated sub systems like PV string disconnector boxes,
array / combiner junction boxes, main junction boxes, ACDB, DCDB for photovoltaic PV application in India. 

Array Junction Boxes [AJB], also referred to as solar PV generator junction boxes and combiner boxes, basically collect DC power from [generally 4 to 16] PV strings. Collected power is then transferred either directly or through a main junction box [MJB] to power inverter. The Power inverter converts the DC power to AC which after metering is used for captive consuption [off grid application] or supplied [sold] to the grid.

Array Junction Boxes are provided with one or more of the accessories mentioned below to improve their functionality.

--> Fuse / MCB for over load protection on each string

--> Fuse / MCB Over load protection on output side

--> Dis connector / isolator on the output side to isolate the AJB from the MJB / Inverter

--> Plug in [plug out] type PV string input connectors MC4 : these special connectors enable quick yet reliable connection and disconnection of the PV string from the array junction box. This is useful during maintance and site upgradation work.

--> Blocking DIODES for reverse current flow protection

--> Class II Surge Protection Devise for protection against electrical surges

Because Array Junction Boxes are installed in outdoor environment near the PV modules they are normally required to be made from a material that is rugged, fire resistant, electrically insulated and UV resistant.

Poly carbonate is one such material. Hanut India is supplying Array Junction Boxes made from imported refined Poly carbonate material. The box provides IP 65 level protection from dust and water. It is Class II electrical enclosure & is UL 94 certified.

Hanut India can fully customize the PV generator junction boxes to meet customers' special requirements.

Use this form to specify your Array Junction Box Configuration so that Hanut India can send its offer to you.

Array junction boxes by Hanut India are installed in several MW size solar PV power plants and also in telecom tower based solar PV projects.

Direct & Indirect customers include Lanco Solar, Kirloskar Limited, Moser Baer, ACME, Tata Power, Eicher Engines [Tafe Motors], L&T Mumbai, Hero Future Energies [40MW project in Rajasthan], Genus, ...

Array junction boxes that comply with GOI Ministry of New and Renewable Energy's [MNRE] Jawaharlal Nehru National Solar Mission [JNNSM] technical guidelines are available with Hanut India.

[New] Hanut India now offers "off the shelf" / "ready stock" array junction boxes, DCDBs, ACDBs, SPD boxes for DC side and SPD boxes for AC side for small solar PV power plants. Customer can quickly install these products. Hanut India can customize these solar power plant building blocks as per customer's instructions [if required].

"ready stock" array junction boxes for plant with thin film solar PV modules

"ready stock" array junction boxes for plant with crystalline solar PV modules                         

"ready stock" DCDB Solar DCDB

"ready stock" SPD for protection of the DC side of solar PV power plant

"ready stock" SPD for protection of the AC side of solar PV power plant

"ready stock" ACDB withOUT GRID backup

"ready stock" ACDB WITH GRID backup

Hanut India Array Junction Boxes for
                                                Solar PV panels

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Hanut India also provides

Array Junction Boxes with wireless string monitoring module

Array Junction Boxes with MC4 compatible string connectors

Customized stands for solar PV modules and frames for solar PV modules.

Main Junction Boxes [MJB]

Stands for mounting solar PV modules

DCDB [with optional multi channel DC energy meter]

Battery Protection Panel

Solar pv ACDB is installed immediately after the solar pv inverter.
Hulasi offer several purpose built ACDBs like ACDB for tied inverter, ACDB for off grid inverter,....
Features & options available in solar ACDB include class 1, class 0.5S solar NET energy meter, multi function meter, earth fault protection unit, IP protection rating from IP21 to IP65 levels, AC SPD class B, SPD class B+C, ON change over switch, etc....

Solar ACCB [AC combiner Box] is also called inverter combiner box.
It is basically a bigger version of ACDB.  ACCB is used in place of ACDB in large solar PV power plants where there are several inverters. ACCBs have one MCCB for each inverter and one master MCCB at the outgoing side.
Almost all features and options that are available with ACDB are also available in ACCBs. ACCBs are normally used in grid tied / grid connected solar power plants.

Hulasi has supplied small ACCB with master MCCB of 100A to large ACCB with master ACB of 2500A rating. see pictures

We use high quality solar NET [bi-directional] energy meters of Genus, Secure Meters & Schneider makes and 0.5 class CTs of Powermat / AE / Equivalent makes. Several states in India like Rajasthan, AP, TN, Maharashtra,... have allowed net metering and have formulated policies for net metering for grid tied solar PV installations. Net metering will promote commercial roof top solar pv installations in India. It makes roof top solar pv installations financially very attractive.
Read these pages 1 2 for basic information about net metering.

Battery protection
                                              panel         battery protection
                                              panel  Array junction box
                                              with MC4 type connectors
Battery Protection panel

Battery Protection panel
Solar combiner junction box with MC4 compatible connectors
 ACDB with change over


ACDB with change over switch


array junction box
main junction box
                                              solar hanut india

    ACCB AC combiner box
Large sized AJB with 80A dis connector

Main Junction Box with 8 x 80A DC Inputs


One of the company's director is a member of Solar Energy Society of India. He has also attended a 4 day solar technical workshop organized by Gujarat Energy research & Management institute.  Go to TOP

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