A Fully Independent Solar Power Plant Engineered for Critical Healthcare Operations & 24/7 Reliability

Project Summary

Stone Age International engineered, supplied, and installed a 60 kW fully off-grid solar PV power plant for the Ma Juah Memorial Hospital located along the RIA Highway.
The hospital, a 100-bedroom medical facility, required an energy system able to support continuous operations, sensitive medical equipment, refrigeration units, lighting, and essential patient-care services — without dependence on the national grid.

This project demonstrates our capacity to design and implement large-scale, standalone solar energy systems that meet strict safety, reliability, and medical-grade performance requirements.

Client Objectives

The hospital faced:

• Unreliable grid power, affecting patient care
• High diesel generator expenses
• Frequent equipment interruptions
• Demand for clean, silent, and stable electricity

The client needed a high-capacity, hospital-grade power solution that guarantees:

✔ 24/7 uninterrupted power supply
✔ Reliable support for critical medical equipment
✔ Reduced operational costs
✔ Long-term energy independence
✔ Scalability for future hospital expansion

Stone Age International delivered a robust solution tailored to these needs.

Scope of Work Delivered

We executed a complete EPC turnkey delivery, including engineering design, procurement, installation, testing, commissioning, and handover.

1. Comprehensive Medical Power Load Assessment

We conducted a deep technical analysis of:

• Critical load circuits (laboratory, emergency ward, maternity ward, pharmacy)
• Non-critical load segregation
• Power factor & voltage stability requirements
• Medical equipment sensitivity
• Refrigeration autonomy needed for medicine
• Surge load from appliances and small machinery

This enabled us to accurately size the PV array, inverter bank, and battery system for 24/7 operation.

2. Engineering, System Architecture & Simulation

Using PVsyst, HelioScope, AutoCAD Electrical, and NEC 690-based design tools, our engineering team developed:

• Full 60 kW PV array design with optimal tilt & orientation
• Battery bank sizing for night-time autonomy
• Distribution board modification & load balancing
• Custom Single Line Diagrams (SLDs)
• Earthing & lightning protection plan
• AC/DC protection coordination
• Surge protection design for both medical and administrative sections

All system architecture complied with:
IEC 61730, IEC 62109, IEC 60364, NEC 690, ISO 45001, and hospital-grade safety recommendations.

3. Procurement of High-Certification Components

We used premium, internationally certified equipment including:

• Tier-1 monocrystalline solar panels
• Commercial-grade inverters with multi-MPPT capability
• High-cycle lithium or industrial battery bank
• Class I & II SPDs (Surge Protection Devices)
• AC/DC isolators and breakers
• Heavy-duty grounding system
• UV-resistant cabling and protective conduits
• Industrial-grade PV mounting systems

All components met UL, TUV, & IEC certifications.

4. High-Precision Installation & Infrastructure Integration

Our senior technicians and engineers executed:

• Structural mounting with anti-corrosion hardware
• PV array wiring with optimal string configuration
• Battery bank assembly, thermal spacing, and ventilation compliance
• Integration with existing hospital circuits
• Implementation of redundancy paths for essential loads
• Earthing grid installation for medical safety
• Surge and lightning protection for equipment longevity
• Labeling & tagging of every AC/DC circuit for safety compliance

The hospital now operates with the reliability of a mini solar power station.

5. Testing, Commissioning & Hospital Staff Training

We carried out:

• No-load and full-load performance testing
• Inverter synchronization tests
• Battery charge/discharge cycle verification
• Critical load simulation during outages
• System stability tests under fluctuating conditions
• Grounding system resistance test
• Emergency shutdown procedure demonstrations

We also provided staff training on:

• System operation
• Safety procedures
• Efficient energy usage
• Monitoring & troubleshooting

A full commissioning certificate and maintenance guidelines were delivered.

Project Outcome

The 60 kW solar system now delivers:

✔ Full off-grid power 24/7
✔ Zero reliance on LEC
✔ Major reduction in generator expenses
✔ Stable operating environment for sensitive medical devices
✔ Improved patient safety and service delivery
✔ Predictable long-term energy budgeting
✔ Cleaner, quieter, and more sustainable hospital operations

This installation transformed the hospital into a fully energy-secure medical facility.

Why This Project Is a Benchmark in Liberia

1. Hospital-Grade Solar Engineering

Built with strict medical reliability standards to ensure zero interruptions to critical care.

2. Designed for Harsh Conditions

High-temperature tolerance, dust resistance, and humidity resilience.

3. Redundant Power Architecture

Ensures that even under component failure, essential services remain powered.

4. Long-Life Infrastructure

Panels rated for 25+ years, batteries for 10+ years, and inverters for 8–12 years.

5. Large-Scale Expertise

This project demonstrates Stone Age International’s capability to deliver industrial-level solar systems.

Why Prospective Clients Trust Stone Age International

Our work on this major hospital system shows we can deliver:

• Large-scale EPC projects
• Mission-critical power solutions
• International-standard safety compliance
• Cost-optimized renewable energy systems
• Reliable after-sales support

We are a trusted partner for institutions requiring zero-failure energy performance.

Do You Need a High-Capacity Solar System for Your Institution?

We specialize in powering:

Hospitals & clinics
Schools & universities
Commercial facilities
Hotels & real estate
Industrial operations

Let us build a system that guarantees clean, uninterrupted power for your operations.