20kW AC Optical Storage Integrated Box

The 20kW AC Optical Storage Integrated Box, supplied by China manufacturer Zhejiang Soutya New Energy LLC, is a three-phase photovoltaic–battery–grid hybrid distribution unit constructed with a UV-stabilised polycarbonate housing and IP65-rated sealing for durable outdoor mounting. The enclosure integrates three 600 V DC surge-protective devices and four 2-pole DC breakers that deliver over-voltage and load-break protection to three PV strings plus one battery string, while factory-wired positive, negative and PE busbars ensure dependable grounding continuity. On the 380/400 V three-phase side it houses two 4-pole AC MCBs, one 4-pole 385 V AC SPD, two 4-pole AC contactors for grid/island switching and one 4-pole RCCB 40 A 30 mA Type A, all factory-mounted on DIN rails behind a flame-retardant partition. Engineered for 20 kW three-phase PV-plus-BESS applications, it provides essential combining, surge immunity, earth-fault protection and manual isolation in one lockable, wall-mount cabinet.

Application scenarios

1. Commercial Rooftops (15–30 kW)

The 20 kW three-phase rating aligns with standard commercial rooftop arrays; the box combines three PV strings and one battery string into a single 380 V output, eliminating multiple wall-mounted breakers and speeding up commissioning.

2. Car-Port & Canopy Structures

Its shallow, IP65 wall-mount enclosure bolts directly to steel beams, giving parking shelters a lockable, visible-isolation point for PV, battery and grid circuits while keeping DC and AC compartments separated for safe vehicle washing or maintenance.

3. Light-Industrial Facade BIPV

UV-stabilised polycarbonate and front-door rotary handles allow flush mounting on warehouse walls; facilities managers can disconnect any DC or AC circuit independently when servicing HVAC or lighting fed from the same hybrid inverter.

4. Agricultural Greenhouses & Barns

The 4-pole RCCB and AC/DC SPDs protect ventilation fans, irrigation pumps and feed systems from lightning-induced transients common in open fields, while the two AC contactors enable automatic grid-to-island transfer during outages.

5. Ground-Mounted Sub-Arrays up to 30 kW

Factory-wired DC buses and three-phase AC section reduce field wiring time for tracker or fixed-tilt rows, delivering a plug-and-play hub that merges three PV strings, one battery string and a 20 kW three-phase inverter output in one weather-proof cabinet.