A Technical Breakdown of the Deye C&I Solution
System Overview
This 500kW / 1,028kWh hybrid energy storage system is built around Deye's modular C&I ESS platform, designed specifically for high-load industrial applications like mining operations. The system integrates 567kW of PV generation with 1,028kWh of battery storage, delivering 500kW of continuous AC output with seamless backup switching.
Parameter | Value |
|---|---|
PV Power | 567 kW |
Battery Storage Capacity | 1,028 kWh |
AC Output Power | 500 kW |
Inverter Backup Power | 350 kW |
Diesel Generator Backup | 500 kW |
The architecture uses a 4 × 125kW PCS configuration with four independent MPPT modules, each feeding into a central 500kW Static Transfer Switch (STS) that manages switching between grid, generator, and battery.
System Architecture: How It Fits Together
PV Generation: 567kW from 864 × LONGi 655W Panels
The PV array consists of 864 LONGi LR8-66HVD-655M bifacial modules, delivering a total DC capacity of approximately 567kW.
These are n-type TOPCon bifacial glass-glass panels rated at 655W with 24.25% module efficiency. The bifacial design captures light from both sides, which is particularly valuable in mining environments where light-coloured ground or reflective surfaces can boost yield. The glass-glass construction provides extra durability against mechanical stress and weather — important for露天 mining conditions where panels are exposed to dust, wind, and temperature extremes.
Each panel measures 2382 × 1134 × 30mm and weighs 33.5kg. The system voltage rating of 1500V allows longer string lengths and reduced DC cabling losses.
Battery Storage: 1,028kWh from 64 × BOS-B-Pack16-A3 Modules
The storage side uses 64 × Deye BOS-B-Pack16-A3 battery modules, arranged into 4 clusters of 16 modules each.
Each module is a LiFePO₄ (LFP) unit rated at 51.2V nominal voltage with 314Ah capacity, delivering 16.08kWh per module. Four clusters, each at 257kWh, give a total nominal energy of 1,028kWh.
The LFP chemistry is critical for mining applications. It offers no thermal runaway risk, excellent thermal stability, and a cycle life of over 6,000 cycles at 90% depth of discharge. Each cluster uses BOS-B-PDU2-A battery controllers rated at 180A charge/discharge current, managing the 200–1000V DC bus.
Component | Specification |
|---|---|
Battery Module | BOS-B-Pack16-A3 |
Chemistry | LiFePO₄ (LFP) |
Nominal Voltage | 51.2 V |
Capacity | 314 Ah |
Energy per Module | 16.08 kWh |
Modules per Cluster | 16 |
Energy per Cluster | 257 kWh |
Total Storage | 1,028 kWh |
Cycle Life | 6,000+ cycles @ 90% DoD |
Max Current | 180 A |
MPPT Modules: 4 × SUN-MPPT-L01-EU-AM8
The system uses 4 × SUN-MPPT-L01-EU-AM8 MPPT modules, one per 150kW PV string. Each module features 8 independent MPPT channels with 40A per channel, supporting a wide voltage range of 180–750V and a maximum PV input power of 160kW.
For a mining site with multiple roof surfaces, varying panel orientations, or partial shading from equipment and terrain, independent MPPT tracking ensures each string operates at its maximum power point regardless of what the others are doing. The modules achieve >99% efficiency and are rated IP65 for outdoor installation.
PCS Modules: 4 × 125kW Power Conversion
Four 125kW PCS modules convert DC power from the batteries and PV into AC power for the mine's equipment. The PCS handles bi-directional power flow — charging batteries from PV or grid, and discharging to supply loads.
The Deye C&I platform supports strong overload capability: in off-grid mode, it can deliver 2× peak power output for 12 seconds — enough to handle the startup surge of heavy motors like crushers, conveyors, and ventilation fans without tripping.
STS Module: SUN-STS500L — The System Brain
The SUN-STS500L Static Transfer Switch is the critical component that makes this solution work for mining. It manages three independent power paths — grid, load, and diesel generator — each supporting up to 500kW.
Switching time is under 10ms. For heavy mining equipment, this is effectively seamless. Conveyors don't stop. Crushers don't trip. Ventilation systems don't reset. Production continues.
The STS supports up to five 100kW or four 125kW PCS units per module, with parallel capability for scaling to 2.5MW. Communication interfaces include RS485 and CAN for integration with Deye Cloud and local EMS.
The Diesel Generator Integration
The system includes a 500kW diesel generator as the final layer of backup. The STS switches the load between generator, grid, and battery — but critically, the generator only starts when absolutely necessary.
The intelligent EMS prioritises:
Solar first (when available)
Battery second (stored energy)
Grid third (if available)
Diesel generator only as a last resort
This "solar-first, diesel-as-backup" architecture is what delivers the 60–70% diesel savings reported by South African mining clients. Less generator runtime means less fuel, less maintenance, less noise, and longer generator life.
Remote Monitoring: Deye Cloud
All components feed data to the Deye Cloud platform. Operators can monitor real-time system performance, track fuel savings, view ROI metrics, and receive alerts — all from a smartphone or web dashboard. For remote mining sites where on-site technical staff are limited, this visibility is essential.
Why This Configuration Works for Mining
UPS-level reliability. The <10ms STS switching means no production interruptions during grid failures. Heavy machinery stays online.
Diesel savings. The system runs on solar and battery first. The generator only fires when both are depleted. Field data shows 60–70% diesel reduction.
Built for harsh conditions. LFP batteries with no thermal runaway risk, IP65-rated MPPT modules, and rugged glass-glass PV panels — this is equipment designed for dust, heat, and continuous operation.
Scalability. The modular architecture means the system can grow. Add more battery clusters. Add more PV. Parallel more STS units. Start at 500kW/1MWh and scale to 2.5MW as the mine expands.
ROI within 3–4 years. Based on South African mining deployment data, the combination of diesel savings, reduced maintenance, and avoided production losses delivers full payback in 3–4 years.
Component Summary
Component | Model | Qty | Key Spec |
|---|---|---|---|
PV Module | LONGi LR8-66HVD-655M | 864 | 655W, n-type TOPCon, bifacial, 24.25% eff. |
Battery Module | Deye BOS-B-Pack16-A3 | 64 | 51.2V, 314Ah, 16.08kWh, LFP |
Battery Controller | Deye BOS-B-PDU2-A | 4 | 180A, 200–1000V DC |
MPPT Module | Deye SUN-MPPT-L01-EU-AM8 | 4 | 160kW, 8 MPPT channels, IP65 |
STS Module | Deye SUN-STS500L | 1 | 500kW, <10ms switching |
PCS | Deye 125kW (×4) | 4 | 125kW each, 2× peak overload |
Mining is tough enough without worrying about whether the power will stay on or how high the diesel bill will go this month.
A hybrid energy storage system doesn’t just solve the power problem — it turns your energy infrastructure into a competitive advantage. Lower costs. Higher reliability. Better environmental performance. And the peace of mind that comes from knowing your operation stays running no matter what the grid does.
Contact Moregosolar to discuss a system designed for your specific operation. We’ll run the numbers, show you the savings, and help you take control of your energy future.
