Solar ACDB & DCDB Panel Manufacturer in Vadodara, India

Every solar plant needs two distribution boards: a DCDB before the inverter and an ACDB after it. The DCDB combines the DC output of the PV strings into one protected feed to the inverter — one DC fuse per string, a DC isolator, and a surge protection device that shunts lightning-induced spikes away from the inverter's DC input. The ACDB takes the inverter's AC output and distributes it to the load or the grid connection, with feeder protection, AC surge protection and isolation for maintenance.

Wisdom Techno Solutions manufactures both boards as a matched pair at our Vadodara works — the same enclosure practice, the same labelling discipline, one drawing set and one delivery. They are built in powder-coated CRCA steel or polycarbonate enclosures, dust-proof, vermin-proof and waterproof, in IP54 for indoor and IP65 for outdoor installation, with components conforming to IEC 60947 and IS 8623.

• DCDB — DC fuse per string (Ferraz Mersen, Eaton and equivalent), DC isolator, DC SPD, MC4 connectors and PG glands
• ACDB — MCB or MCCB per feeder, AC SPD Type II, isolation switch, metering and net-metering provisions where required
• Powder-coated enclosures built for Indian site conditions — heat, dust and monsoon
• IEC 61439-1 assembly practice and MNRE guidelines for solar installations
• Configurations from a single rooftop pair to multi-feeder utility-scale boards
• Routine tests and inspection before dispatch, test report shipped with the boards

The same engineering team that builds our IEC 61439 LT switchboards engineers the solar pair, so a solar ACDB that must tie into an existing plant LT network is coordinated with that network rather than designed in isolation.

The table below is the standard build. Feeder count, fuse ratings, SPD class and metering are set from the array layout, the inverter schedule and the site's single line diagram.

The two boards are not interchangeable, and an AC-rated device of the same frame size is not a substitute for a DC-rated one. Detailed pages: Solar DCDB and AC Distribution Board. For collecting several string-inverter outputs before the ACDB, see the AC combiner box.

On the DC side, string cables land in the array junction box on the structure, run to the DCDB, and from there one protected DC feed goes to the inverter. On the AC side, inverter outputs are collected — directly in a small plant, or through an AC combiner box in a multi-inverter plant — and distributed by the ACDB to the metering point and the grid interface or plant LT network.

Ordering the whole chain from one manufacturer keeps enclosure practice, labelling and documentation consistent across the plant — one engineering contact and one delivery to chase instead of four. The complete package is described on our solar BOS electrical package page.

Five inputs let us quote without assumptions: the array layout (strings, modules per string), the string voltage and current at site design conditions, the inverter schedule (models, count, AC output rating), the indoor or outdoor mounting for each board with required IP rating, and any DISCOM, MNRE, developer or lender specification the boards must satisfy. A single line diagram covering both sides is the ideal starting point.

• AC-rated devices specified on the DC side — DC arcs do not pass through zero; disconnectors, fuses and SPDs must be DC-rated for the actual system voltage
• SPD class left unstated — the SPD is the board's main job on both sides; class and coordination should come from the site's lightning risk, not a default
• IP rating chosen by habit — an outdoor board next to a cooling tower needs IP65 and a canopy, not IP54
• String fuse rating copied from the module datasheet STC current — it must account for irradiance enhancement and the fuse manufacturer's derating
• No spare feeders in the ACDB — plants get extended; two spare ways cost little at build time

A solar ACDB is an LT panel: busbar sizing, temperature rise, clearances and separation follow the same IEC 61439-1 discipline as an industrial switchboard. Our boards are engineered from your single line diagram, built at the Kotambi works, and put through routine tests and inspection before dispatch — insulation resistance, wiring verification, functional checks — with the test report shipped with the board. Drawings (GA and SLD) are submitted for approval before manufacturing begins.

• BESS Electrical Panel Design — PCS, ACDB & DCDB — how the same boards extend to battery-coupled plants
• Panel Earthing & Earth Busbar Design — earthing practice that solar boards must follow
• FAT & Routine Test Checklist — what is checked before any board leaves the works
• LT Panel Specification & RFQ Guide — how to specify a board so quotes are comparable

If this is not the right fit for your layout, these are the related products we build to the same standard:

• Solar DCDB — the DC-side board in detail — string fuses, isolator and DC SPD
• AC Distribution Board — the AC-side board in detail — feeder protection and metering
• AC Combiner Box — collects several string-inverter outputs into fewer feeders
• Array Junction Box (AJB) — the structure-mounted DC collection box for the strings
• 800V LT Panel — for high-voltage inverter systems and 800 V AC class plants
• Solar BOS Electrical Package — the complete solar board package from one works

Email your single line diagram, load list and system fault level and our engineers will come back with a technical offer. Not sure what to send? See what a panel manufacturer needs in order to quote accurately.

Page updated: 17 September 2026