Solar vacuum tubes are usually less sensitive to sun angle & orientation than plat panel collectors. Their spherical design lets sunlight to pass at a favourable angle all through the day – from sunrise to dusk.
On the other hand, flat panel collectors are more sensitive to sun angle, and may need the use of racking system to make the most of their production.
When not sure about which technology to execute, talk to your local dealer or get in touch with Northern Lights directly. Being a leading supplier of Vacuum tube solar water heaters and solar flat panel collectors, we would be happy to check out both technologies and recommend which is best fit for your particular application.