Question 1

What is a DCDB in a solar system?

Accepted Answer

A DCDB (DC distribution box) sits between the solar panels and the inverter. It holds the DC breakers or fuses for each string, a DC surge protector and often an isolator, so the array is protected and can be switched off safely.

Question 2

What is an ACDB and do I need one?

Accepted Answer

An ACDB (AC distribution box) sits between the inverter output and your main distribution board. It gives the inverter its own breaker, a surge protector and an isolation point. Most installers fit one on every solar system.

Question 3

Can you build a box to my specification?

Accepted Answer

Yes. Send us your inverter rating, number of PV strings or circuits, and preferred breaker brand, and we will quote a box to match.

Question 4

What information do you need for a quotation?

Accepted Answer

For a DCDB: the number of strings, panel Voc and Isc, and inverter MPPT inputs. For an ACDB: inverter kW and phase. For a DB box: the number of circuits, supply phase and any RCCB or SPD requirement.

ACDB, DCDB & DB Boxes

Solar DCDB (DC Distribution Boxes)

Solar DCDB — 1 In 1 Out (Single String, up to 1000 V DC)

Solar DCDB — 2 In 2 Out (Two Strings, up to 1000 V DC)

Solar DCDB — 4 In 2 Out (Four Strings, up to 1000 V DC)

Solar DCDB — 6 In 3 Out (Six Strings, up to 1000 V DC)

Solar DCDB — 8 In 4 Out (Eight Strings, up to 1000 V DC)

Solar ACDB (AC Distribution Boxes)

Solar ACDB — Single Phase, 32 A / 63 A

Solar ACDB — Three Phase, 63 A / 100 A

Solar ACDB — Three Phase MCCB, 125 A to 250 A

MCB Distribution Boards (DB Boxes)

MCB Distribution Box — Single Phase, 4 to 12 Way

TPN Distribution Board — Three Phase, 4 to 16 Way

Main Distribution Box with RCCB and Surge Protector

Outdoor Weatherproof DB Box — IP65