The Estonian startup Roofit.solar recently raised 6.4 million euros from a group of investors led by Bayware in Germany. The company will use the funds to commercialize its three BIPV modules with a power output of 110 to 160 W. All products rely on a 0.5 mm metal back sheet with a highly durable pure coating.
A photovoltaic system constructed using Roofit.solar panels.
Estonian startup Roofit.solar received 6.4 million euros from a group of investors led by BayWare Energy Ventures, an independent subsidiary of the German renewable energy company BayWare, through a Series A investment in October.
This round of investment is supported by EdgeCap Partners, which focuses on private and venture capital investments in Europe; Taavet Hinrikus and Sten Tamkivi, Estonian entrepreneurs who have worked in well-known companies such as Wise and Skype; and Spring Capital, a local venture capital fund; and IT company Helmes Investments, the company said in a statement, and pointed out that it has so far raised a total of 10 million euros in equity and 1.8 million euros in grant funds.
The funding is currently used to bring to market the building integrated photovoltaic (BIPV) module technology, which was developed by the startup with the support of Tallinn University of Technology (TalTech).
Roofit.solar currently sells three different seam black monocrystalline BIPV panels with power output of 110, 135 and 160 W. All panels are equipped with a 0.5 mm metal back plate and highly durable Pural coating, and claim to have a snail trail-free structure. On the front, the panels are covered with 3.2 mm tempered low-iron glass with anti-reflective technology, which can be used for roof slopes of minimum 10 degrees and minimum ventilation below 50 mm.
According to the manufacturer, the overlap area on the top of the panel is intended to ensure a waterproof connection between two adjacent panels on the roof, and the overlap area on the roof must be at least 200 mm. The panel cables must run between the slats, and the junction box under each panel must be installed between the two slats.
The smallest product is called Roofit 3×8/1 10 W/RR33/B/DS, with a nominal power of 110W, an open circuit voltage of 15.9V, and a short circuit current of 9.11A. The module size is 1,343 x 550 mm and weighs 11 kg.
The medium-sized panel, called Roofit 3×10/13 5 W/RR33/B/DS, has an output power of 135 W, an open circuit voltage of 19.9 V, and a short circuit current of 9.04 A. It measures 1,658 x 550 mm and weighs 13.5 kg.
The most powerful module is 160 W Roofit 3×12/160W/RR33/B/DS. It has an open circuit voltage of 23.9 V and a short circuit current of 9.0 A. It measures 1,973 x 550 mm and weighs 16 kg.
All panels can be used at system voltages up to 1,000 V and operating temperatures from -40 C to 85 degrees Celsius. Their power temperature coefficient is -0.36%/degree Celsius. The product provides a 25-year linear power output guarantee and a 10-year product guarantee. Its output is guaranteed to maintain 80% of the original efficiency for 25 years.
The company produces these modules at its factory in Tallinn, Estonia.
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