Solar First Group Georgia 23.8MWp Solar Farm Power Station

Ⅰ. Project Overview

Project Background

Georgia, a zone with a humid and hot climate where an annual precipitation can reach 500-650 mm and an annual temperature ranges about 24℃, places high demands on the long-term corrosion resistance and structural stability of the mounting system. However, it's Solar First Group who overcomes those challenges and brings the photovoltaic mounting system with overall solution of a total installed capacity of 23.8MWp, helping it construct an efficient, reliable, and environmentally friendly solar farm power station under flat terrain conditions.

Project Requirements

When reviewing the project requirements, we found the core requirement of the client is to build a fixed mounting system which can be adaptable to the humid and hot climate and take into account both economy and ease of construction. Besides, his specific requirements also demonstrated as: (1) The mounting material shall have excellent corrosion resistance to ensure a design life of more than 25 years for the power station; (2) The foundation scheme shall be adapted to the relatively hard geological conditions of the site, while reducing disturbance to the original terrain; (3) The overall structure shall be simple and the installation be efficient, while controlling the overall cost under the premise of ensuring reliability.

Ⅱ. Challenges

Challenges in Material Durability under Humid and Hot Conditions

The project site in Georgia is characterized by a humid and hot climate with elevated atmospheric moisture, which significantly accelerates the corrosion rate of metal mounting structures. Conventional coated materials are susceptible to risks such as cut-edge corrosion and coating failure under prolonged exposure,necessitating the adoption of higher-grade anti-corrosion solutions to ensure reliability across the full lifecycle.

Challenges in Foundation Construction under Hard Soil Conditions

The site is underlain by relatively hard soil,for which traditional foundation forms may present considerable construction difficulties and elevated costs. Achieving the optimal balance among load-bearing capacity, construction efficiency, environmental compatibility and cost-effectiveness constitutes the critical challenge in foundation scheme design.

III. Solution

To address the above challenges, Solar First Group provides a customized solution centered on MAC structure and C-type bored cast-in-place pile.

For humid and hot environments: High corrosion-resistant MAC materials are used.

The main body of the bracket is made of MAC steel with a coating weight of 350g/m². MAC material has significant advantages in the field of photovoltaic structure corrosion protection:

• Excellent corrosion resistance: Passing a 4000-hour neutral salt spray test by an authoritative institution, no red rust was produced on the coating surface, demonstrating corrosion resistance far exceeding that of traditional galvanized materials;

• Self-repair of the cuts: A dense protective film automatically forms at the cuts, effectively preventing corrosion;
•  Long-life guarantee: Meets the 25-year service life requirements of power plants.

For harder soil: C-type bored cast-in-pile foundation is adopted.

Based on the site's geological conditions, a C-type bored cast-in-place pile scheme is adopted to achieve integrated pile-column design:

• Strong terrain adaptability: The foundation top elevation can be flexibly adjusted according to the terrain, eliminating the need for large-scale site leveling;
• Minimal environmental impact: Only drilling is required, eliminating the need for large-scale foundation pit excavation, minimizing damage to original vegetation and landforms;
• High construction precision: After the C-type steel piles are embedded in the borehole, the height can be adjusted before pouring concrete, effectively compensating for construction elevation errors;
• Good economic efficiency: Under suitable geological conditions, the overall cost is superior to independent foundations and precast piles, with a simple structure and clear stress distribution.

Ⅳ. Results

Project Successfully Completed and Operating Stably

The 23.8 MW Solar Farm in Georgia was completed and commissioned in 2025.The zinc-aluminum-magnesium (Zn-Al-Mg) mounting system supplied by Solar First Group has demonstrated excellent durability under hot and humid conditions, while the C-type bored pile foundation achieved stable,reliable,and efficient construction performance in relatively hard soil conditions.

Remarkable Ecological Benefits and Environmental Friendliness

The project adopted a pile-column integrated design and a minimized earthwork excavation scheme,thereby preserving the original topography and vegetation to the greatest extent,reflecting the green and environmentally conscious construction philosophy.The power station delivers substantial clean electricity annually,contributing to the optimization of the regional energy structure.

Demonstration and Promotional Value

This project has successfully validated the long-term applicability of Zn-Al-Mg materials in hot and humid climates(verified through 4,000-hour salt spray testing),as well as the comprehensive advantages of C-type bored piles under relatively hard soil conditions.The integrated solution combining" highly corrosion-resistant materials with pile-column foundations" provides a replicable and scalable exemplary model for photovoltaic power station construction under similar climatic and geological conditions.