The Joule VisSolis in-roof solar collector is manufactured from superior materials to complement your roof structure. The frame of the underside of the collector is made from responsibly sourced Austrian timber. The outer flashing kit is manufactured from anodised aluminium. The black anodised flashing kit allows the collector to blend seamlessly into your roof structure. The unique designs of the flashing kits specified for either slate or tile roofs. The Joule Navitas in-roof solar collector is one of the only fire rated in-roof collectors available. 

No. of People	System Size	Min. Cylinder Size	Kwh Output	Download File
1-2	2	250L	1,611.03Kwh	IP2.pdf
3-4	3	300L	2,302.06Kwh	IP3.pdf
5-6	4	400L	3,101.84Kwh	IP4.pdf
7-8	5	500L	3,847.86Kwh	IP5.pdf

Under current building regulations as described in Technical Guidance Document B, no items may form part of the roofs structure without undergoing fire testing to EN 13501-5 standards. The Joule VisSolis In-Roof slate and tile panel has been fire tested separately. Two tests were conducted on each sample. The first was “Spread of Flame” test to determine whether or not the panel itself would facilitate flame spreading across your roof. The second was “Fire Penetration” test which determines the panel and flashing kits ability to stop fire penetrating. The panel must pass and have a minimum of a one hour fire rating.

Click here to download the Current Irish Technical Guidance Document B (Fire Safety)
Click here to download the Current UK Technical Guidance Document B (Fire Safety)

VisSolis In-Roof Collector Glass Construction

The Joule Navitas On-Roof solar collector is manufactured using Pilkington Solar E Low-E coated glass which is designed to transmit the maximum possible amount of visible light, absorb and reject the maximum amount of solar infra-red energy, and reflect the maximum amount of long wave (room temperature) infra-red energy (far I.R.), all with a hard, durable pyrolitic coating.

Pilkington Solar E Low-E coated glass works, year round, to save energy in 2 ways:

During the winter heating season, a room at 70 F radiates energy in the far IR (maximum radiation occurs at around 10 micrometer wavelength).  A non-coated glass surface facing a warm room readily absorbs 84% of the radiant heat that is directed towards it.  The glass becomes warm and then re-radiates this absorbed heat on out towards the cold exterior.  A Pilkington Solar E low emissivity coating, on the #2 surface of single glazing or of an IG unit, only absorbs 15 % of this valuable room heat.  The balance of 85% of the radiant heat is reflected back towards the room and so significantly reduces overall the heat loss.

VisSolis In-Roof Collector Frame Construction

The Joule VisSolis solar collector is manufactured using responsibly sourced Austrian timber from managed forests. The underside of the collector is manufactured from timber designed to age and grown with your roof structure. This ensures that no unwanted stresses occur as your roof weathers and ages. Different flashing kits available allow for precision integration into your roof’s structure. The flashing kits are secured above the collector after it has been fixed fast to your roof structure.

Collector Tests
The Joule Navitas collector is one of the most tested and certified collectors available. The collector has been tested to,

• Thermal and mechanical tests to EN12975 1-2,
• Impact resistance tested to DIN EN12975-2:2006 using steel ball test,
• Positive wind loading test to EN12975 (4,000pa)
• Negative wind loading test to EN12975 (4,000pa)
• NSAI Agreement Certified
• Fire penetration tested
• Spread of Flame Tested