Engineered Solar Thermal Storage Systems

Alternate Energy Technologies designs and manufactures commercial solar thermal storage systems engineered for long-term reliability, efficiency, and integration across a wide range of solar water heating applications. Our solar thermal storage tanks support both closed-loop and open-loop configurations, with scalable volumes from 80 to 5,000 gallons to serve commercial, institutional, and community-scale needs.

These solar hot water storage tanks are the backbone of high-efficiency solar thermal systems, decoupling collection from demand and enabling optimal thermal delivery even under varying usage conditions or during low-sunlight hours.

Our indirect solar thermal storage tanks are engineered to pair seamlessly with closed-loop system designs, which use antifreeze or heat transfer fluids to protect against freezing and contamination. Each tank features an internal or external heat exchanger configuration, durable insulation, and corrosion-resistant linings to maximize heat retention and system longevity.

Key features include: 

• Scalable storage volumes from 80 to 5000 gallons 

• Top and side port flexibility for tailored system design 

• Factory-integrated sensor wells and electric backup ports 

• Internal or external heat exchange configurations 

Beyond the tank, AET offers full solar water heating system packages including pumps, controllers, and pre-configured piping kits that ensure smooth integration into complex mechanical systems. Our control strategies are tailored to maximize solar gain, minimize auxiliary load, and deliver performance data for compliance and monitoring.

Benefits: 

• Streamlined specifications for engineers and contractors 

• Integrated monitoring for performance optimization 

AET solar thermal storage systems play a central role in reducing direct emissions from fuel-fired water heating systems. By shifting thermal production to solar, buildings and facilities can achieve significant Scope 1 emissions reduction. 

Our solutions support: 

• IRA Section 48 tax credit eligibility 

• BABA-compliant equipment sourcing 

• Reduced reliance on propane, natural gas, or electric resistance heating 

AET solar thermal storage systems are engineered to meet the high-demand requirements of a wide range of commercial and institutional applications, including:

• Multi-unit residential and commercial complexes 

• Hospitality and resort facilities 

• Healthcare and institutional buildings 

• Agricultural processing and industrial sanitation 

• Small district or multi-building installations 

With over four decades of domestic manufacturing excellence, AET offers unmatched value in solar thermal storage system reliability, closed-loop compatibility, and performance longevity. Every solar thermal storage tank is engineered, fabricated, and inspected in the USA to deliver enduring performance in the toughest operating conditions.