Solar Wall


The SolarWall® system delivers the fastest solar payback on the planet by heating the ventilation air required in commercial and industrial buildings.

Product details


SolarDuct™ is based on the highly efficient and award-winning SolarWall® system. The technology has been specifically engineered for roof settings and for applications in which a traditional wall mounted system is not feasible.

Product details

More Information on Solar Wall

The SolarWall® system delivers the fastest solar payback on the planet by heating the ventilation air required in commercial and industrial buildings.

The solar air heating system is building integrated, and has been used globally for the past 20 years. Past customers include; FedEx, Ford, Wal-Mart, 3M, Bombardier, U.S. Military and NASA. SolarWall systems displace a significant amount of C02 and are eligible for various financial incentives.

Features & Advantages

  • Significantly lowers heating bills
  • Lowest cost solar technology
  • Fast payback
  • Heats fresh air & improves indoor air quality
  • Heats air 30-70?F (16-38?C) above ambient on a sunny day
  • Maintenance free & 30+ year typical lifespan
  • Destratification savings for industrial buildings
  • Collector efficiency up to 80%
  • Huge reduction in CO2 emissions
  • Building integrated - variety of colours
  • Up to 6 LEED Points


  • Manufacturing Buildings
  • Industrial Buildings
  • Office Buildings
  • Multi-Residential
  • Process Drying
  • Municipal Facilities
  • Hospitals & Schools
  • Warehouses
  • Agriculture
  • Military

Other Options

  • Roof-mounted with SolarDuct™
  • PV/Thermal with SolarDuct™ PV/T

SolarDuct™ PV/T is a modular rooftop application of the PV/thermal technology. The heat is drawn off the back of the PV modules and is ducted to the nearest rooftop air handler. The ‘excess heat’ is then channeled into the building’s HVAC system where it is used to offset the heating load. The SolarWall® air heating panels serve as the racking system needed to mount the PV modules. This also contributes to the cost-effectiveness of the cogeneration system. The modular units are easy to install and are angled at an ideal orientation for maximum solar gain.



Heating can typically be one of the largest energy expenditures in the building industry. The ability of a SolarWall® system to address this energy usage and to displace a sizable amount of it - and the resulting greenhouse gas emissions - explains why the technology has such a compelling return on investment. SolarWall systems produce up to 600 watts/m2 (60 watts/ft2) of thermal energy. When the sun warms the surface of the collector, the heated air is drawn through thousands of tiny perforations on the surface and ducted to the existing air intake. The solar heated air is then distributed throughout the building via the conventional ventilation system or dedicated fans and ducting.


The SolarWall technology is building integrated and has few moving parts. It has a 30+ year lifespan and requires no maintenance. Systems are available in a variety of colors and profiles to meet your building design requirements.


PV module efficiency is typically between 8-15%. What happens to the rest of the sun’s energy that shines on the panels? Most of it is converted into heat energy, which normally is lost and provides no value to the system owner. As well, the heat build-up behind PV modules reduces the electrical output by 0.4-0.5% for every 1°C above its rated output temperature (which is 25°C). Given that roofs can reach temperatures as high as 90°C, the actual operating efficiency of PV systems is often significantly less than the rated output.For standalone PV systems, high capital costs and low energy production result in very long paybacks. The PV/T cogeneration technology offers a solution that actually makes PV systems financially feasible in standard commercial, industrial, and institutional applications.


Considering the replacement of a natural gas installation, for a production of 2.1 GJ/m2 a year, the CO2 reduction will be around 150 kg/m2 per year.

Better the sun irradiation is, higher is the efficiency of the solar wall and higher is the CO2 emission reduction.

Copyright © 2010 Voltas Technologies (Pty) LTD
Web Design by ThinkTank