ACDB & DCDB Boxes.
Made In-House. Rated for Your System.
Heaven Green Energy manufactures AC and DC distribution boxes in-house — rated precisely for each solar installation. Surge-protected, DISCOM-compliant, and ready for Gujarat's toughest conditions.
10,000+ families already saving with solar
System Flow — Where ACDB & DCDB Fit
ACDB & DCDB Distribution Boxes
Two protection boxes, both manufactured in-house by Heaven Green Energy, covering the DC and AC sides of every solar installation.
ACDB Box
AC Distribution Box
The ACDB (AC Distribution Box) sits between the solar inverter's AC output and the main distribution board. It houses the AC MCB (Miniature Circuit Breaker), AC SPD (Surge Protection Device), and output terminals — providing the first line of overcurrent and overvoltage protection on the AC side. Heaven Green Energy manufactures ACDB boxes in-house, allowing us to tailor the component rating to each inverter's exact output capacity.
Specifications
Features
- In-house manufactured — custom rated for every inverter model
- IP65 weatherproof enclosure for rooftop and outdoor installation
- Class II AC SPD guards against lightning-induced surges
- AC MCB for overcurrent and short-circuit protection
- Clearly labelled terminals for safe commissioning and maintenance
- Cable glands included for weatherproof cable entry
DCDB Box
DC Distribution Box
The DCDB (DC Distribution Box) sits between the solar panel strings and the inverter DC input. It consolidates multiple panel strings, provides individual fuse protection for each string, and houses the DC SPD (Surge Protection Device) that shields the inverter from lightning strikes and switching transients. Like our ACDB, the Heaven Green Energy DCDB is manufactured in-house, with fuse ratings matched to the panel string short-circuit current of each specific project.
Specifications
Features
- In-house manufactured — custom string count and fuse ratings per project
- IP65 weatherproof enclosure suitable for rooftop mounting
- Individual string fuses prevent one faulty string from affecting others
- Class II DC SPD absorbs lightning transients before they reach the inverter
- DC disconnect switch for safe maintenance isolation
- Labelled string inputs for fast fault identification
What Are ACDB & DCDB Boxes — and Why Do They Matter?
Protection boxes are not optional add-ons. They are the safety and compliance backbone of every grid-tied solar system in India.
What is an ACDB?
An ACDB (AC Distribution Box) is the protective switchgear assembly placed between a solar inverter's AC output terminals and the main electrical distribution board. It provides overcurrent protection (via MCB), surge protection (via SPD), and a safe isolation point for maintenance. Every grid-tied solar installation in India requires an ACDB to comply with CEA guidelines and pass DISCOM net-metering inspection.
What is a DCDB?
A DCDB (DC Distribution Box) is the protective assembly between solar panel strings and the inverter's DC input. It combines string fuse protection, a DC surge protection device, and a DC isolation switch. In systems with multiple panel strings, the DCDB prevents a fault in one string from propagating to others and provides the first surge protection layer closest to the panels — where lightning risk is highest.
Why Are They Mandatory?
CEA (Central Electricity Authority) guidelines for solar installations, referenced in DISCOM net-metering technical requirements across Gujarat, mandate protective switchgear on both the DC and AC sides. PGVCL, UGVCL, DGVCL, and MGVCL inspectors check for proper ACDB and DCDB installation during commissioning. Missing or undersized protection boxes are the most common cause of net-metering inspection failure.
ACDB vs DCDB — The Difference
ACDB protects the AC output side using standard AC MCBs and AC-rated SPDs (which handle AC voltage characteristics). DCDB protects the DC input side using DC-rated fuses and DC-rated SPDs (DC fuses and SPDs must handle higher arc energy and cannot be substituted with AC components). Using AC fuses or MCBs on the DC side is a safety hazard that Heaven Green Energy never permits in any installation.
The Advantage of Building Our Own Distribution Boxes
Most solar installers source ACDB and DCDB boxes from third-party suppliers and accept whatever ratings are in stock. Heaven Green Energy manufactures its own — because your protection equipment should match your system exactly.
Ratings Matched to Every Project
Off-the-shelf ACDB and DCDB boxes use generic component ratings that may over- or under-protect specific inverter models. Because we manufacture in-house, the MCB, fuse, and SPD ratings in every box are matched to the exact inverter capacity and string configuration of that project — not a generic catalogue standard.
Quality Control We Own
Third-party sourced distribution boxes go through supply chains that can compromise component quality. Our in-house boxes use brand-name MCBs, certified SPDs, and tinned copper busbars — assembled and tested by our own electrical team before dispatch. Every box is checked for correct torque, insulation resistance, and labelling before it leaves our facility.
Fast Availability for B2B Orders
In-house manufacturing means we are not dependent on third-party lead times. EPC contractors and project developers can place bulk ACDB/DCDB orders with us and get fast dispatch from our Surat facility. Custom string counts and voltage ratings are available for larger commercial and industrial projects.
Documentation for DISCOM
Every ACDB and DCDB we supply comes with component datasheets, wiring diagrams, and test certificates as part of the project documentation file. This makes DISCOM net-metering submissions faster and reduces the chance of inspection queries about protection equipment specifications.
ACDB & DCDB — Frequently Asked Questions
Everything you need to know before going solar.
Still have questions? Is an ACDB and DCDB box required for all solar installations in Gujarat?
Can I use a normal AC MCB box as the ACDB for my solar system?
How many string inputs does a DCDB box accommodate?
Do you supply ACDB and DCDB boxes to other EPC installers?
Need ACDB or DCDB boxes for your solar project?
Heaven Green Energy manufactures and supplies in-house ACDB and DCDB boxes for all system sizes. Custom configurations available for commercial and industrial projects. Call +91 90811 00296.