This document defines the startup configuration for a medium scale underground gold mine powered by solar energy combined with a diesel generator (no battery storage). The design minimizes capital cost while maintaining industrial reliability. Batteries can be added later without replacing inverters. 1. Equipment Load Equipment Power (kW) Medium Crusher 15 Medium Ball Mill 11 Conveyor 3 Aux Loads 2 TOTAL 31 2. Design Parameters Running load: 31 kW Motor surge margin: 45 kW Operating hours: 8 hrs/day Daily energy demand: ~250 kWh Solar design output: ~375 kWh/day 3. Solar Array Installed capacity: 75 kWp Panel size: 550 W Panel quantity: 136 units Mounting: Ground steel structure Expected sun hours: 5 hrs/day 4. Inverter + Generator Hybrid inverters: 3 × 20 kW (60 kW total) Diesel generator: 60 kVA Generator operates as virtual battery during clouds and motor starting. 5. Motor Control Crusher and ball mill MUST use VFD (variable frequency drives). Benefits: • 60% startup current reduction • Stable solar blending • Longer motor life • Prevent inverter trips 6. System Architecture Solar Panels → Hybrid Inverters → Mining Loads Diesel Generator → Hybrid Inverters (Auto Assist) Solar always supplies first. Generator adds only missing power. 7. Production Estimate Crusher throughput: 3–5 tons/hour Daily ore processing: ~30 tons (single shift) Monthly production: ~900 tons 8. Cost Estimate (USD) Solar panels $25,000 Hybrid inverters $20,000 Mounting + BOS $15,000 60 kVA Generator $12,000 VFD + cabinets $6,000 TOTAL ≈ $75,000 9. Operating Strategy Phase■1 (Startup): Solar + Generator only Phase■2 (Later): Add 200–300 kWh battery for night milling Same inverters support future battery upgrade. Engineering Notes: • Earthing grid mandatory • DC/AC surge protection required • Generator auto■start enabled • System expandable to 24■hour mining
Solar energy systems can provide power to mines
Solar energy systems can provide power to mines, reduce energy costs, and integrate with other energy systems to maintain continuous power supply for the mines.
We have established strategic partnerships with major solar energy manufacturers in China, we can build large solar power plants, we can supply equipment for solar energy projects on residential rooftops, and we can provide solar energy system solutions for mines (meeting electricity needs for lighting and mechanical power).
solar system
