* Email
Northern Logo


Large Commercial Solar Water Tanks

Call for Price

Ask a question

Large Commercial Solar Water Tanks

Unpressurized 120-5000 Gallons sizes

large commercial water tank


STSS large scale solar storage tanks are the most cost effective means of large scale thermal storage.  With sizes starting at 120 Gallons to 5000 Gallons, our large commercial solar storage tanks have the advantage of going through any size door as they ship on a pallet just 19” wide x 53” high.  This is very important as access to boiler rooms makes installing larger commercial solar tanks difficult if not impossible.  Even more amazing is our solar storage tanks can be assembled within an hour from uncrating! 

The tanks can be fitted with any number of through ports that connect to your piping via a 1” FPT fitting.   In an open loop configuration solar water is drawn in from the bottom port and hot returning water is returned in the upper port.  This means the top layer is always the hottest.  This stratification allows the system to deliver results even when the entire tank is not fully loaded

The tanks are not designed for potable water rather buffer energy through water storage and this energy is transfer to and from the supply and loads via internal copper heat exchangers.  These heat exchangers can be sized to fit the demand and supply loads of virtually any project.  From domestic hot water to space heating as well as swimming pools, these heat exchangers can be sized to match any project.  They are 3/4" copper coils and come in lengths up to 180 feet which can be combined in parallel for even larger systems.  We can help you with sizing so give us a call 1 800-759-8990.


  •  High Insulation Value with 2 degree of heat loss per day.
  •  Onsite assembly can fit through any door
  •  Cost effective - 1/5 the price of steel tanks
  •  Weight - can be shipped at a fraction of the cost
  •  3 Sensor port wells Included
  •  120-5000 GALLON Capacity
  •  3 year tank and liner warranty


commercial storage with internal heat exchanger commercial solar storage tank large scale solar tank



STSS solar storage tank







Return Policy

We want you to be 100% satisfied with your purchase, if you are not, ship it back to us in the original packaging condition and we will refund your purchase less a 10% restocking fee, provided the equipment is received in good condition. Refund offer valid for 30 days from receipt of product.


We feel that being honest is a much better policy to win your trust rather than trying to lure you with nearly impossible statements such as lifetime warranty. Nothing lasts forever! Our warranty policy is simple; we offer a 3 year warranty on everything we sell and 10 years on our collectors. With this warranty you will get NO hassle next business day replacement (if shipping service and inventory permits). However, as a valued customer you will get technical support through the lifetime ownership of your product. Our Collector do carry longer warranties 10 years from the manufacture. The warranty cover failures that occur during normal operational conditions or manufactures defects. It does not cover failure due to inappropriate operation such as freezing or over heat. Damage caused by vandalism, storms, floods etc. Your houshold insurance should be modified to cover the system from such situations.

We accept PayPal and Credit card (Visa or Mastercard). If you are ordering multiple units and part, please call us to see if we can save you shipping cost for multiple item orders.


For complete solar kits please allow 2-3 weeks delivery. These kits are shipped via our preferred freight forwarder company and where possible we will schedule residential tailgate delivery (curbside). Heaters and accessories are usually in stock unless indicated otherwise. We do have expedited shipping services available for an additional fee. Please call us if you need a rush order. Once your order has been shipped you will be contacted via email and a tracking number will be provided.

  • Model: N-307
  • Shipping Weight: 400lbs
  • 2 Units in Stock
  • Manufactured by: NLSS

This product was added to our catalog on Wednesday 06 June, 2018.

Help Desk Software