Envirosun® THX Plus Solar Hot Water System 300 litre 2 Panel Closed Circuit Glycol

Description

The Envirosun® THX Plus is a premium closed circuit solar hot water solution engineered for performance and durability. Its 300-litre storage capacity and two-panel configuration deliver consistent hot water for families throughout the Greater Nepean region.

How it works:

This thermosiphon system circulates food-grade glycol through your solar panels rather than household water. The heated glycol transfers its warmth to your storage cylinder through an internal heat exchanger. This closed circuit design offers significant advantages—the glycol protects against freezing in cooler months and prevents mineral buildup that can damage open circuit systems.

Whether you’re in Penrith, Emu Plains, Kingswood, or surrounding suburbs, the THX Plus adapts to local conditions. The glycol protection means fewer maintenance issues and longer system life. Penrith Hot Water has installed countless Envirosun® systems across the region, and customers appreciate the hassle-free performance year-round.

Unlike open circuit systems, the closed circuit design suits all water types—hard or soft. You get reliability without worrying about water quality compatibility.

Why Choose This Product?

• Australian-engineered closed circuit design from Envirosun® (East Coast)
• Food-grade glycol provides freeze and corrosion protection
• Internal heat exchanger prevents mineral buildup
• Suits all water types—hard or soft
• Extensive 10-year coverage on cylinder and panels
• STCs available to reduce your upfront investment
• Proven performance across Penrith, Emu Plains, Kingswood, and Greater Nepean
• Free delivery and professional installation from Penrith Hot Water
• Minimal maintenance with reliable thermosiphon operation
• Energy savings typically pay for itself within 7-10 years

Product Details

Type: Solar Hot Water Heater (Closed Circuit Thermosiphon)

Storage Capacity: 300 litres

Panel Configuration: 2 panels, closed circuit

Heat Transfer Fluid: Food-grade glycol

Model Number: THX300/40

System Design: Passive thermosiphon with heat exchanger (no pump required)

Supplier Region: East Coast (Envirosun® brand)

Technical Specifications

• Storage cylinder volume: 300 litres
• Panel type: Flat plate solar collectors
• Circuit type: Closed circuit with internal heat exchanger
• Heat transfer medium: Food-grade glycol
• Thermosiphon operation: Natural convection heating
• Installation type: Roof-mounted panels with wall-mounted cylinder
• Freeze protection: Built-in via glycol fluid
• Corrosion protection: Inherent in closed circuit design

Dimensions

• Length: 2150 mm
• Width: 650 mm
• Height: 600 mm

Warranty Information

Storage Cylinder: 10-year warranty

Solar Panels: 10-year warranty

Onsite Labour: 2-year warranty

Warranty conditions apply. See full warranty documentation for details.

Delivery Information

Penrith Hot Water offers free delivery to:

• Penrith
• Emu Plains
• Kingswood
• Glenmore Park
• Cranebrook
• Surrounding suburbs in the Greater Nepean

Important: All deliveries must be within 50 km of a town with a population over 30,000.

If you’re located outside these areas, please phone us to check availability and discuss delivery options. Note that purchases outside our standard delivery zones will be refunded if free delivery cannot be provided.

STC Information

All supply and installation prices include STCs assigned to us as a point-of-sale discount.

All supply only prices require the customer to claim the STCs themselves.

What Are STCs?

Small-scale Technology Certificates (STCs) are Australian government rebates on eligible hot water systems. The Envirosun® THX Plus qualifies, reducing your overall cost.

Your Options

Supply and Installation: STCs are applied at checkout—no paperwork needed.

Supply Only: You’ll claim the STCs yourself. We’ll provide the documentation.

For current rebate amounts on the Envirosun® THX Plus, contact Penrith Hot Water for a free quote.

Downloads

ENVIROSUN® Thermosiphon Solar Hot Water Heater Brochure

Ready to Upgrade Section

Upgrade to reliable solar hot water with closed circuit protection. The Envirosun® THX Plus delivers performance and peace of mind for Penrith, Emu Plains, Kingswood, and the Greater Nepean.

Penrith Hot Water makes installation straightforward—from free consultation to expert setup. Contact us today for a no-obligation quote.

Phone Penrith Hot Water now for your free assessment.