A 30,000 m² industrial facility in Guangdong Province replaced grid-only power with a hybrid PV-plus-storage system, using BeSafe H50Pro three-phase battery cabinets to capture midday solar and discharge it during evening peak demand.
The facility operates injection-molding and extrusion lines on a three-shift schedule. Daytime load is steady at around 800 kW, but evening production peaks at 1.4 MW, falling squarely in the regional utility's peak demand window where capacity charges apply.
The facility's monthly electricity bill was dominated by two components: peak demand charges (averaging USD 18,000 per month) and total kWh consumption (USD 42,000 per month). The plant manager's mandate was to reduce both — without disrupting production schedules or accepting unreliable backup power.
Rooftop space was available: 30,000 m² of south-facing metal deck with no shading obstructions. The decision to add storage came from a financial analysis showing that solar alone would be wasted — midday solar production at 1.6 MW was being clipped or exported at low feed-in tariffs. Storing the excess and time-shifting it to the evening peak dramatically improved the project economics.
The integrator evaluated three commercial-storage vendors. BeSafe was selected for three reasons:
Installation was performed during a scheduled 14-day production pause in Q3 2025. The 10 H50Pro cabinets were anchor-bolted to a concrete pad adjacent to the rooftop solar inverter station. AC cabling ran in cable tray from the cabinets to the main switchgear room (35 m run). PV DC cabling from the rooftop combiner boxes landed directly on the cabinets' built-in MPPT inputs — no external combiner required.
| Component | Specification | Quantity |
|---|---|---|
| PV Modules | 580 W bifacial mono | 3,450 panels |
| Total PV Capacity | 2.0 MWp DC | — |
| PV Inverters | String inverters, 50 kW each | 40 units |
| Battery Cabinets | BeSafe H50Pro (50 kW / 61.44 kWh each) | 10 cabinets |
| Total Storage | 500 kW AC / 614.4 kWh | — |
| Battery Chemistry | LiFePO4, 6,000 cycles / 70% retention | — |
| EMS Platform | BeSafe Cloud (peak shaving + self-consumption modes) | 1 subscription |
| Grid Connection | Three-phase 400 VAC, 1,000 kVA transformer | — |
| Backup Runtime (Full Load) | ~45 minutes at 800 kW site load | — |
The BeSafe EMS runs three operating modes across the day, switching automatically based on the facility's load profile and the regional time-of-use tariff schedule:
The peak-shaving value was higher than originally projected because the regional utility raised capacity charges mid-year. The system continues to operate in peak-shaving + self-consumption hybrid mode and is monitored remotely via BeSafe Cloud. The plant manager is now considering a Phase 2 expansion to cover the night shift, which would require 4–6 additional H50Pro cabinets.
For integrators considering similar projects: the BeSafe H50Pro cabinet form factor accepts PV input directly, which simplified the AC and DC architecture considerably. A key planning step was confirming that the existing 1,000 kVA transformer could absorb the cabinet discharge (500 kW) without exceeding nameplate capacity during the peak window — this was a simple thermal study.
For projects with night-shift loads, BeSafe engineering recommends doubling the cabinet count to extend the discharge window. The Phase 2 expansion is currently in engineering review.
Send us your facility's load profile and rooftop dimensions — we'll model the storage sizing and project economics.
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