Samut Prakan Warehouse
Project Overview
The Challenge
This large-scale logistics hub in Samut Prakan operates cold-chain storage, cross-docking facilities, and distribution management around the clock. Refrigeration units and climate-controlled warehousing create substantial electricity demand that peaks during the hottest hours of the day. The facility operator wanted to reduce energy costs but could not commit capital expenditure to a solar system, as available funds were allocated to warehouse expansion and fleet modernization. A zero-investment solution aligned with the building lease structure was essential.
System Design & Engineering
CapSolar deployed a 3.2 MW solar PPA system across 18,000 sqm of the warehouse's flat, unobstructed roof. The expansive, uniform surface is ideal for solar: no chimneys, limited mechanical protrusions, and minimal shading throughout the day. A total of 5,500 Tier-1 monocrystalline panels were installed at optimal tilt angles for Samut Prakan's latitude. The PPA contract was structured to align with the warehouse lease term, addressing a common concern for logistics operators who do not own the buildings they occupy. CapSolar retains ownership of the system and handles all maintenance, insurance, and performance monitoring.
Energy Performance & Savings
The system generates 4,300 MWh of clean electricity annually, reducing the facility's grid electricity costs by 32% with zero upfront investment. At current PEA industrial tariff rates, the fixed PPA rate delivers immediate savings that grow each year as grid tariffs rise. The cold-chain cooling load creates a natural synergy with solar generation — refrigeration compressors work hardest between 11 AM and 3 PM when ambient temperatures peak, exactly when solar output is at maximum. This alignment drives self-consumption rates above 88%, meaning nearly all generated electricity is used on-site.
Environmental Impact
The installation eliminates 2,580 tons of CO₂ per year, making it one of the highest-impact projects in the CapSolar portfolio by carbon reduction. For a logistics operator serving multinational supply chains, documented carbon reduction data supports Scope 2 emissions reporting and strengthens the facility's position in sustainability-conscious supply chain partnerships. The equivalent impact is approximately removing 560 vehicles from the road annually.
Why This Project Matters
This project demonstrates that large rooftop solar PPA in the logistics sector delivers exceptional economics due to the natural alignment between warehouse cooling loads and solar generation peaks. The lease-aligned PPA structure solves the ownership challenge that prevents many warehouse operators from adopting solar. For logistics and cold-chain facilities across Samut Prakan and greater Bangkok, this case study shows that solar PPA can achieve 32% cost savings at scale while supporting corporate sustainability reporting — all with zero capital investment.
