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Sun Earth  |  SKU: 100004-14.1-80

SunEarth Cascade 2 Hot Water Station 80 / 120 Gallon Solar Drainback System

Regular price $9,888.00
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Tank Size

SunEarth Cascade 2 Hot Water Station – 80/120 Gallon Solar Drainback System

The SunEarth Cascade 2 Hot Water Station (HWS) 80/120 Gallon is a complete, OG-300 certified drainback solar water heating system engineered to deliver exceptional efficiency, reliability, and freeze protection for residential solar thermal applications. Factory assembled and hydraulically tested, the Cascade 2 HWS combines premium SunEarth components into one professionally engineered package, dramatically reducing installation time while improving long-term system performance.

The Cascade 2 system utilizes a gravity drainback design that automatically drains the collector loop whenever the circulator pump stops operating. This passive freeze protection eliminates standing water in the collectors and exposed piping, allowing reliable operation in climates experiencing temperatures as low as -50°F without depending solely on glycol for freeze protection.

The system includes an 80/120-gallon insulated solar storage tank, integrated drainback reservoir, stainless steel circulator pump, differential temperature controller, copper heat exchanger, thermostatic mixing valve, expansion tank, and factory-installed service valves. Designed specifically for use with SunEarth Empire Series solar collectors, the Cascade 2 HWS provides dependable renewable hot water while minimizing maintenance requirements.

⚙️Key Features:

Feature Benefit
80/120-Gallon Solar Storage Tank Large domestic hot water capacity
Factory-Assembled Hot Water Station Faster installation and fewer field connections
Gravity Drainback Design Passive freeze protection without stagnant collector fluid
OG-300 Certified System Independently tested for performance and reliability
Stainless Steel 3-Speed Circulator Pump Efficient solar loop circulation
Copper Heat Exchanger Excellent heat transfer performance
LCD Differential Temperature Controller Automatically optimizes solar collection
Thermostatic Mixing Valve Adjustable outlet temperature for user comfort
Service Bypass Valves Simplifies maintenance and servicing
Genuine SunEarth OEM System Designed specifically for Cascade 2 solar systems


⚙️Technical Specifications:


Specification Details
Tank Capacity 80/120 Gallons
Product Dimensions 68" H × 29" L × 24.5" W
Product Weight 273 lb
Manufacturer SunEarth
Part Number 100004-14.1-80
Product Type Cascade 2 Hot Water Station
System Type Drainback Solar Water Heating
Drainback Reservoir Capacity 6.0 Gallons
Tank Construction Glass-Lined Steel Vessel
Tank Insulation 2" Non-CFC Foam Insulation
Heat Exchanger Copper Double-Wall Tubing
Circulator Pump 1/12 HP Stainless Steel, 3-Speed
Expansion Tank Potable Thermal Expansion Tank
Mixing Valve 3/4" Lead-Free Bronze
Potable Water Connections 3/4 in.
Input Voltage 120 VAC
Maximum Solar Power Input 150 Watts
Optional Backup Heating Element 4,500 W @ 240 VAC
Maximum Collector Area 96 sq. ft.
Maximum Building Height 20 ft.
Freeze Protection Gravity Drainback (-50°F Rated System)
Controller LCD Differential Temperature Controller
Certification ICC-SRCC OG-300
Application Residential Solar Domestic Hot Water

⚙️Technical Documents:

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