STSS Large Solar Storage Tanks

Unpressurized Large Solar Tanks

Unpressurized Large Solar Tanks

Our STSS non pressurized solar storage tanks are the most cost effective means for large solar storage requirements. These tanks are available in sizes ranging from 120 gallons to 5000 gallons. They are made from 2” thick aluminum reinforce polystyrene with a heat loss of under 2 degree F per day!

They are light weight and modular in construction. This reduces the shipping cost by nearly 1/10 of other large steel tanks. With many sizes to choose STSS tanks are the new standard in affordable commercial solar water heating systems.


  • High temperature EPDM, custom-fit 48 mil polypropylene tank liner
  • 3-year warranty on tank and liner
  • Shipped to any location in a full-frame crate
  • Super-insulated
  • Available in multiple sizes and width to meet any project requirement
  • Flexible to fit your job site
  • Site-assembled with disassembled components able to fit through a standard door

How it works

Multiple internal Coil Configurations

*Call us for pricing and shipping quote 1 (800) 317-9054