Solar Hybrid System Implementation for a Remote Commercial Resort
Project Overview In early 2023, a remote commercial resort located in the mountainous region of Northern Thailand faced persistent challenges with unreliable grid power and high electricity costs. The resort, which operates year-round and includes accommodation, dining, and recreational facilities, required a stable and sustainable energy solution to ensure uninterrupted operations while reducing dependence on diesel generators.
The project was led by Mr. Somchai, an experienced renewable energy engineer, and supported by a local installation team. The goal was to design and install a hybrid solar system capable of supporting the resort’s daily energy needs, with backup power for critical loads.
Technical Solution After a thorough site assessment, the team selected the TP15KL three-phase low-voltage inverter due to its robust performance and flexibility. Key technical features that influenced the decision included:
- Dual MPPT Inputs: Allowed connection of two separate PV arrays (total capacity ~30kWp), optimized for varying sunlight conditions in the hilly terrain.
- Wide Operating Voltage Range (180–850VDC): Ensured efficient energy harvest even during early morning and cloudy periods.
- Backup UPS Function: Provided seamless transition (<10ms) to battery power during grid outages, ensuring continuous operation of essential services.
- Battery Compatibility: Supported both lithium and lead-acid batteries (40–60V), with a high charging/discharging current of 300A, enabling rapid energy storage and release.
- High Efficiency (97.5% Euro Efficiency): Maximized energy yield and reduced losses, crucial for a commercial setup.
- IP66 Rating & Wide Temperature Range: Made the system suitable for outdoor installation in a humid, tropical climate with temperatures ranging from 15°C to 45°C.
System Configuration
- PV Array: 28kWp split into two strings, each connected to an independent MPPT.
- Battery Storage: 40kWh lithium-ion battery bank for nighttime and backup use.
- Grid Interaction: System configured for on-grid operation with export control, complying with local regulations.
- Monitoring: Real-time performance tracking via integrated WiFi and mobile app.
Implementation Timeline
- Site Survey: February 2023
- Equipment Installation: March–April 2023
- Commissioning & Testing: May 2023
- Handover & Training: June 2023
Results & Benefits Since commissioning, the system has consistently met over 80% of the resort’s daytime energy demand through solar generation. Key outcomes include:
- Reduced Diesel Consumption: Diesel generator usage dropped by 70%, lowering both cost and emissions.
- Grid Independence: Enhanced resilience during frequent grid outages common in rural areas.
- Low Maintenance: The inverter’s smart cooling and rugged design ensured reliable performance with minimal upkeep.
- Guest Satisfaction: Uninterrupted power supply improved guest experience, especially during evening events.
Conclusion This project demonstrates how advanced hybrid inverters like the TP15KL can provide a scalable and efficient energy solution for commercial establishments in regions with unstable grids. By leveraging solar power and intelligent battery management, the resort achieved significant operational and environmental benefits—proving the viability of renewable energy in challenging terrains.
