Glass-Glass PV Module

In the past and currently, the standard photovoltaic module has been manufactured using 3.2 -4mm glass on the front and a polymer-based insulating back sheet. Despite well known disadvantages of such concept many years has been no real changes to improve technology of manufacturing PV modules.

PV industrial machinery and glass processing technologies limited ability  to step-out of using polymer-based backsheet in large scale of PV module production.

Significant step further of glass tempering technology made possible to substitute polimer-based back sheet for ultra thin- 2 mm glass. And ViaSolis is a pioneer of using Glass-Glass PV module manufacturing technology.

Durability of this solution has been proved by production of isolating-glass units more then 50 years, all of us can satisfy in it day after day.

This module provides important advantages incorporate the following features:

- More then 6% increased of the module efficiency, determinated by:

• use of thin glass that increases light transmission. This corresponds to 4% increase in yield (kWh per kWp) or in other words to a reduction of all optical losses in a solar module by 40%;
• anti-reflective glass coating reduces light reflection effect adversely;
• lamination foil specially developed to glass-glass PV industry (PVB) increase a spectrum of use of light waves from 280 nano-meters in length. Standard modules used only on the EVA-320 nano-meters in length that almost 20% shorter;
• ViaSolis  PV cell surface specifically designed for the structure of lamination foil, which reduces banding losses up to 60 % (0.8% versus standard module - up to 5%);
• the PVB film used in the back is extremely bright white (ultra White), which increases the light reflection in the glass top, and the flow cell;
• glass-glass module has better cooling properties. The 1 C° decrease of module temperature increases the p-CI module efficiency of 0.42%;

- Improved life time performance up to 50 years/ Durability

• longer duration of exposure time  is achieved by changing the insulating polymer sheet into UV-resistant glass;
• perimeter of the module in 100% is covered with thermoplastic insulation (Butyl), which eliminates access of moisture to the PV cells. The durability tests of PV modules show that the main reason of the fall of the efficiency of the modules is influenced of the penetration of the moisture;
• using the same thickness of material in ViaSolis module creates an ideal module design in terms of mechanical strength. The structure of same thickness glass (top and bottom) determinate the zero-force in the PV cell despite external load forces (wind, snow) that influence PV module during lifetime of it.
• low vacuum based technology used by ViaSolis for PV module lamination does not create stress to the PV cells. The prismatic structure of PV cell surface is a key factor determining the efficiency of the module. Assurance of stability of prismatic structure of PV cell- essential factor for stability of lifetime efficiency of the module.

- 25% reduction in PV module weight provide wider utilization (in comparison with standard Glass-Glass modules);;

- The module manufacturing process reduces energy consumption by 59.5%.

This factor solves the environmental dispute, which is based on the fact that the most of the electricity used in Asian origin PV module production is produced in the most environmentally harmful way (coal-power plants);

- Enhanced usability options

Innovative approach as a optimal weight of the PV module provides extensive product’s integration in to construction and architectural solutions. Via Solis photovoltaic modules can be manufactured according to the needs of individual clients by exploiting the possibilities of the color spectrum, size, desirable shape, different light transmission or insulating characteristics.