800V AC Combiner Box 4 In 1 Out

The 800V AC Combiner Box 4 In 1 Out, supplied by China manufacturer Zhejiang Soutya New Energy LLC, is an 800 V three-phase inverter-combiner unit constructed with a powder-coated, UV-resistant steel enclosure and IP65 / IK10-rated sealing for durable outdoor performance. The enclosure houses four 4-pole AC MCCBs (160-250 A ) that deliver individual over-current and short-circuit protection to each inverter input, while a single 4 pole AC MCCB (630-1000 A ) provides visible-break isolation and overload protection for the combined output. Factory-wired L1, L2, L3, N and PE copper busbars ensure dependable current-carrying capacity and equipotential bonding, and a built-in Type II 4 pole 800V AC SPD guards against lightning-induced surges. Engineered for up to four solar string inverters (4* 100-160 kW), it provides essential AC combining, surge immunity and maintenance safety .

Application scenarios

1. Utility Scale Ground Mount Blocks (400–640 kW)

The four 160–250 A MCCB inputs accept up to four 160 kW string inverters; the 1000 A output MCCB feeds a 690/800 V medium-voltage transformer, reducing cable losses and trenching across large solar parks.

2. Central-Inverter Skid Substations

Mounted beside the inverter rack, the box acts as a “local AC hub” — paralleling four 800 V inverter outputs before a single large feeder to the MV switchgear, simplifying skid wiring and maintenance access.

3. Large Commercial Rooftops > 400 kW

IP65 steel housing and IK10 impact rating allow rooftop placement where space is tight; the 800 V rated components raise string voltage, cutting DC cabling costs while keeping the AC side compact and lockable.

4. Agricultural Greenhouses & Barn Clusters

The Type-2 800 V SPD protects irrigation pumps, ventilation fans and milking equipment from lightning surges common in open fields, while individual input MCCBs let farmers isolate one inverter without shutting down the entire cluster.

5. Distributed 4-Pod Industrial Sites

Each 160–250 A MCCB serves as a local disconnect for a separate building wing or car-port pod; the common 800–1000 A output MCCB simplifies metering and grid connection, while the SPD guards the whole site against transient over-voltages.