Industry Insights - As commercial and industrial (C&I) energy storage demand surges across global emerging markets, long-duration energy storage (LDES) systems delivering 4+ hours of continuous power have become the core infrastructure for overseas customers to unlock peak-valley electricity arbitrage, backup power reliability and renewable PV self-consumption. But in high-temperature, high-humidity markets across Africa and Southeast Asia-where grid access is unreliable-traditional air-cooled storage cabinets have long suffered from summer temperature-related derating, uneven cell temperature differentials, accelerated capacity fade and elevated thermal runaway risks, dragging down the expected return on investment for long-duration storage projects. Xiehang Energy Storage has officially launched its overseas-market customized 261kWh liquid-cooled energy storage cabinet, built with a hermetically sealed constant-temperature closed-loop cooling system that delivers cell-level temperature precision, giving overseas users a safer, longer-lifespan solution for long-duration energy storage applications.
Per the International Energy Agency's 2026 Global C&I Energy Storage Development Report, global installed capacity of 4+ hour long-duration storage systems grew 47% year-over-year in 2025, with emerging markets across Africa and Southeast Asia contributing 62% of that total incremental growth. The report also flags a critical gap: in tropical and subtropical regions with average annual temperatures above 28℃, operational failure rates for traditional air-cooled storage projects are 2.3 times higher than comparable deployments in temperate climates. When outdoor temperatures break 50℃ in summer, the internal cell-to-cell temperature delta in air-cooled cabinets can widen to more than 8℃, triggering mandatory system derating to protect overheating cells. Planned 4-hour long-duration discharge cycles are often cut short, shutting down after only 2 hours of runtime. Continuous high-temperature operation also accelerates degradation of cell electrolyte, with air-cooled units seeing average capacity fade of more than 28% after just three years of operation. Many overseas owners report projects originally calculated to pay back in six years stretch to nine years due to frequent shutdowns and capacity loss. Compounding these concerns is safety: air-cooled systems cannot reliably maintain stable cell temperatures during multi-hour charge-discharge cycles, creating fire risks from accumulated heat buildup for overseas industrial parks with limited on-site fire safety infrastructure. Solving thermal management for long-duration storage use cases has become a non-negotiable requirement for Chinese energy storage manufacturers expanding into overseas markets.
The newly launched 261kWh liquid-cooled cabinet is Xiehang's purpose-built long-duration storage product, developed specifically for the harsh conditions of overseas target markets. The unit is equipped with automotive-grade 314Ah large-capacity LFP (lithium iron phosphate) cells, delivering a rated capacity of 261kWh, and rated for 0.25C charge/discharge to support full 4-hour long-duration cycles-perfectly matching core overseas C&I use cases including peak shaving, PV energy time-shifting and emergency backup power. The biggest difference from traditional air-cooled systems is its fully enclosed constant-temperature liquid cooling loop: built with a plate heat exchanger design that makes direct thermal contact with the large face of each cell, the system keeps the cell-to-cell temperature delta across the entire cabinet strictly within 2℃. No matter if external temperatures drop to -30℃ in winter or climb to 55℃ during extreme summer heat, the system dynamically adjusts coolant flow to keep core cell operating temperature stable in the 25–35℃ optimal efficiency window. Compared to traditional air-cooled designs, this liquid cooling system delivers 40% higher heat dissipation efficiency, while cutting auxiliary cooling power consumption by 30%. It eliminates the need for the high-power exhaust fans required in air-cooled cabinets, which not only reduces operational energy waste but also blocks ingress of outdoor dust through ventilation openings-a critical improvement for dusty construction sites and industrial zones. The unit's layered safety design includes three tiers of thermal protection: cell-level fire-resistant insulation, real-time coolant leak detection across all piping, and an automatic clean-agent fire suppression system tied to smoke and temperature sensors. The cabinet carries an IP55 ingress protection rating, with three layers of anti-corrosion coating on all metal components to withstand harsh overseas deployments, including high salt spray on Southeast Asian coasts, dust and vibration at African construction sites, and unshaded outdoor installation at industrial parks, ensuring the cooling system delivers reliable performance even after years of exposed operation.
For overseas C&I users, this liquid cooling design delivers tangible improvements in full-lifecycle project returns. With cells held at a consistent, optimal temperature, the 261kWh cabinet delivers a rated cycle life of more than 8,000 charge-discharge cycles-33% longer than the 6,000-cycle lifespan of comparable air-cooled units, with average annual capacity fade under 2% over the first 10 years of operation, eliminating the need for costly early cell replacements. Because the cooling loop is fully sealed, the unit requires no regular air filter replacements every three months as air-cooled cabinets do, cutting annual maintenance costs by 60% in dusty construction and factory environments. Per Xiehang's overseas business team, the product completed a pilot deployment in August this year at a large food processing plant on the outskirts of Nairobi, Kenya. The plant previously used a same-capacity air-cooled storage system to keep its refrigeration lines running during grid outages; during the region's 52℃ summer peak, the air-cooled unit frequently triggered overheat protection, cutting its planned 4-hour emergency backup runtime to just 2 hours and causing nearly $2,000 in annual losses from spoiled raw materials due to unplanned shutdowns. After three years of operation, the old air-cooled unit had already lost 28% of its rated capacity. After installing Xiehang's 261kWh liquid-cooled cabinet, system telemetry recorded a maximum cell temperature delta of only 1.8℃ even during the hottest summer weeks, with no overheat protection triggers across three consecutive months of operation. The unit now reliably delivers full 4-hour long-duration discharge cycles, cutting the project's calculated payback period from 7.5 years to 4.8 years, and has already drawn procurement inquiries from three adjacent industrial parks in the region.
As a China-based energy storage manufacturer focused on overseas markets, Xiehang designed this product around real on-the-ground constraints from the early development phase. Backed by zero-tariff benefits under free trade agreements with 53 African partner nations and ASEAN member states, the 261kWh liquid-cooled cabinet's total landed cost is 35% lower than comparable liquid-cooled products from European and North American brands. Built to address the shortage of on-site maintenance staff at overseas projects, the unit integrates Xiehang's proprietary KMS cloud energy management platform, allowing remote monitoring of cell-level temperature, state of charge and system performance from any web or mobile dashboard, with automated fault alerts sent 72 hours in advance to eliminate the need for regular on-site technician visits. For small and mid-sized industrial park customers facing upfront funding gaps, Xiehang also partners with local distributors to offer flexible installment payment options to lower project adoption barriers. As noted by a Xiehang spokesperson, long-duration storage is core infrastructure for overseas users seeking energy independence, and precision liquid cooling is not a premium marketing gimmick-it is a non-negotiable requirement to protect long-term project returns for customers in high-temperature global regions. The team is already developing larger, standardized liquid-cooled products built for long-duration storage use cases, with a long-term goal of bringing China's mature, reliable energy storage technology within reach of overseas users. The mission is to help more C&I customers in emerging markets bypass the pain points of traditional power supply, and share in the benefits of the global clean energy transition.