Solar DC distribution boards (DCDB) up to 1000 V DC
Accu-Panels Energy manufactures DC distribution boards (DCDB) in Ahmedabad, India for solar PV plants and project-specific DC distribution. A DCDB combines the outputs of PV module strings, protects each string with DC fuses and the whole array with DC surge protection and isolation, and delivers a clean, protected DC feed to the inverter — protecting the inverter from lightning surges and string faults. Boards operate up to 1000 V DC in IP65 enclosures (polycarbonate for rooftop plants, CRCA for larger installations) to IEC 61439-1, with reverse-blocking diodes, MC4 or gland cable entries and monitoring provision configured to the string design of your plant.
Share string, inverter and SLD details for a DCDB proposal.
what is the DC distribution board?
DC distribution board combines the dc power of solar PV modules strings into a single array. In Addition, a combination of all strings is made a pass through individual array dc fuses in shunt with DC SPD.
What is the purpose of DCDB?
It is manufactured by keeping view of the protection of expensive inverters from the direct and indirect lightning surges traveling from solar panels through its connected cables.
how DCDB is made?
DCDB comes with the combination package of DC fuses, surge protection device(SPD), DC MCB/Isolators. Also, Accu Panels DCDB is dust, vermin, and waterproof are made out of polycarbonate enclosures. PG plastic glands and MC4 connectors give the provision of suitable cable entry and exit points of appropriate sizes of incoming and also outgoing cables.
We deliver quality-driven Dc distribution board DCDB across India and satisfied IEC-61439-1 standard hence became the trust of reputed solar power manufacturer.
Protection Level
Firstly, all indoor panels have protected with IP54 or better even more all outdoor panels have protected with IP65 or better. Secondly, all PCC Panels made by laser cutting CRCA sheet and powder coating with the 7-Tank process. In addition, Accu-panels have provided IP65 certificates for the Dc distribution board.
what’s new?
Accu Panels have developed a new product with reverse blocking diodes used in conjunction with respective array strings to protect from such loss. Also, we providing more expensive solar dcdb for power plants. In conclusion, there are many reasons to buy a product from us.
Features
- Accu Panels Solar DCDB satisfies IEC-61439-1 and mandatory by MNRE and operates up to 1000Vdc.
- The enclosure provides IP65 protection.
- Complete electrical safety to avoid hazards.
- Ferraz Mersen/Eaton DC Fuses to prevent overloads.
- Reverse blocking diodes for reverse current flow protection.
- User-friendly DC termination and decent cable management.
- Easy cable plug-in and plug-out provision for cable connection.
- Wall mounting design for easy installation and maintenance.
All the Panels with metal clad, totally enclosed, rigid, floor mounted, air-insulated, cubical type suitable for operation on three-phase / single phase,415 or 230 volts, 50 Hz. The power control center panel has designed for a minimum expected ambient temperature of 45 degrees Celsius. Also 80 percent humidity and dusty weather.
Our Main Solar DC Products:
- 1in 1out DCDB
- 2in 2out DCDB
- 4in 4out DCDB
- 8in 8out DCDB
- 10in 10out DCDB
Using in Solar Power Plant, Rooftop power plant, Solar plant, Renewable energy Source, and any type of solar power plants. Also using for LT power distribution in electricity.
Accu-panels focus the product and services delivery to industries such as solar power plants, Utilities of industries, Manufacturing plants, Mining and ball mills, Food Beverage, Marine, Construction, and Other industries that require a reliable partner for a cost-effective solution for electrical panels.
DCDB role in solar PV electrical distribution
PV strings leave the module rows as many small DC circuits. The DCDB (or array junction box on larger plants) is where those circuits are paralleled, fused string-by-string, protected against surges and isolated for maintenance before a single DC feed enters the inverter. Downstream of the inverter the AC side is handled by the AC distribution board (ACDB) and, on MW-scale plants, the 800 V LT panel. Correct DCDB design decides how well the inverter is protected and how quickly a faulty string can be found and isolated.
DCDB design inputs
- String configuration — number of strings, modules per string, string current and open-circuit voltage
- System voltage (up to 1000 V DC for the standard range) and the inverter’s MPPT input arrangement
- Inverter make, model and count; number of DCDB outputs required
- Single-line diagram of the DC side and the cable schedule
- Protection requirement — string fuse rating, DC SPD type, DC isolator or MCB rating, reverse-blocking diodes where specified
- Site conditions — rooftop or ground-mounted, mounting position, ambient temperature, dust, humidity, cable entry (MC4 or gland)
- Monitoring requirement — string current monitoring or communication to the plant SCADA where needed
DCDB design and installation considerations
- Enclosure — polycarbonate IP65 for rooftop and small plants; CRCA IP65 with 7-tank pretreatment and powder coat for larger or harsher installations
- Protection coordination — string fuse rating matched to module short-circuit current, SPD type matched to the exposure, isolator rated for DC switching
- Temperature and derating — DC components derated for rooftop ambient and enclosure heat rise [VERIFY: standard derating practice / maximum ambient]
- Cable management — labelled string terminations, MC4 connectors or PG glands sized for the actual cables, and clear positive/negative segregation
- Documentation — GA and wiring drawing, BOM, IP certificate and routine-test record matching the delivered board
Related solar panel solutions
- AC distribution board (ACDB) — the AC-side counterpart
- Solar ACDB & DCDB — combined solar distribution boards
- AC combiner box and array junction box
- 800 V LT panel for MW-scale plants
- How ACDB and DCDB work in a solar plant — explainer
- Contact the Accu-Panels solar team
Frequently asked questions
What is the difference between a DCDB and an array junction box?
Both combine and protect PV strings. “DCDB” is usually the board close to the inverter that combines several string groups; an array junction box sits in the field near the module rows on larger plants. The protection philosophy is the same — string fuses, DC SPD, isolation.
What information is needed for a DCDB quotation?
String count and configuration, system voltage, inverter details, the DC-side SLD, protection and monitoring requirement, and mounting and site conditions.
Up to what voltage are the DCDBs rated?
The standard solar DCDB range operates up to 1000 V DC and is built to IEC 61439-1 in IP65 enclosures.
Why are reverse-blocking diodes used?
They stop current flowing back into a shaded or faulty string from the healthy strings, which protects the modules and avoids generation loss.
Can the DCDB be supplied with string monitoring?
Monitoring provision is configured where the project specifies it [VERIFY: string-monitoring options offered].
How can I share a solar project requirement?
Use the contact page to send string, inverter and SLD details. The solar team returns a technical proposal for discussion.
Share string, inverter and SLD details with Accu-Panels to discuss a suitable DC distribution board configuration.
