MC4 Connector for solar plants
Customized Array Junction Boxes (AJB) and Distribution Boxes (ACDB/DCDB)
Solar Earthing Kit
Havells solar DC cables
DCR Certificate
Mohit Kashyap
DCR Certificates (Adani Solar)
+91-9220440029
My ACDB for Jio Microinverters
Jio Sparq Quad DM 2000 microinverters are single-phase units (2000 W / ~8.7 A each at 230 V). Connecting one microinverter to each of the three phases (R, Y, B) creates a balanced 6 kW three-phase output with ~8.7 A per phase.
To protect this setup and meet Indian DISCOM net-metering rules, your AC Distribution Box (ACDB) needs 16 A to 25 A per-phase protection alongside a Type 2 3P+N SPD.
1. Recommended Havells ACDB Bill of Materials (BOM)
Engineering Note on MCCB vs. MCB: Standard 6 kW–10 kW three-phase solar ACDBs typically use a 4-Pole C-Curve MCB (16 A to 25 A) because each microinverter’s inrush current is under 8 A. However, if your local DISCOM specifically mandates an MCCB for net-metering inspection, 25 A 4-Pole is the lowest standard frame rating in Havells’ MCCB lineup.
2. Pre-Built ACDBs & Havells Breakers
If you prefer buying a ready-wired box or sourcing individual Havells breakers to assemble locally, here are matching options:
ACDB Three Phase with Havells 32A MCB and Havells AC SPD 320V (5KW- 14KW)
₹3,780.00
Aastha Power Solution
The ACDB Three Phase with Havells 32A MCB and Havells AC SPD 320V is a pre-wired box using both a Havells MCB and a Havells 320 V AC SPD in a weatherproof housing.
Havells Euro II 16A MCB, 4 Pole, C-Curve, 10kA – DHMGCFPF016
₹1,264.96
ElectrixZone
5.0 star rating5.0 (25)
The Havells Euro II 16A 4-Pole MCB matches your 8.7 A per-phase output closely, offering tight overload protection and 10 kA short-circuit breaking capacity.
Havells Euro II 25A MCB, 4 Pole, C-Curve, 10kA – DHMGCFPF025
₹1,264.96
ElectrixZone
4.8 star rating4.8 (25)
The Havells Euro II 25A 4-Pole MCB gives extra thermal headroom for high rooftop summer temperatures while still protecting a 4 sq. mm or 6 sq. mm AC cable run.
Havells Euro II 32A MCB, 4 Pole, C-Curve, 10kA – DHMGCFPF032
₹1,264.96
ElectrixZone
5.0 star rating5.0 (25)
The Havells Euro II 32A 4-Pole MCB is the standard breaker size used in 5 kW–14 kW pre-assembled ACDBs if you plan to add a fourth microinverter later.
3. Critical Wiring & Off-Grid Mode Checks
- Phase Balancing: Wire Microinverter 1 to R + N, Microinverter 2 to Y + N, and Microinverter 3 to B + N, then combine them at the 4-pole breaker inside the ACDB.
- Cable Sizing: Use a 4-core 4 sq. mm (or 6 sq. mm for runs over 25 meters) copper armoured/flexible AC cable from the ACDB to your net-metering point to keep voltage rise under 1% (preventing over-voltage trips above 276 V).
- Off-Grid / Dual-Mode Isolation: Because your Jio Sparq Quad DM 2000 models support automatic off-grid backup (90–245 V, 55 Hz) during grid outages, confirm with your installer whether your backup loads are wired through a dedicated changeover/relay board so off-grid power never backfeeds the utility grid.
- Earthing: Connect the ACDB SPD earth terminal directly to a dedicated copper-bonded earth pit (resistance < 2 ohms) using a 6 sq. mm or 10 sq. mm green/yellow copper wire.