Energy generating glass(PV glass) performance analysis

To put it in a nut shell, their glass doesn't have great performance. 

 

 

Here is the specification of one of the most popular their product. 

 

 

1. Transparency 

It's transparency is relatively low ranging from 10%~30%. You can check how dark is the 20% and 30% transparency glass is with following figures.

 

 

 

2. SHGC (Solar Heat Gain Coefficient)

It has wide range of SHGC value from 9%~41% so it's hard to compare but in Passive House standard the minimum SHGC value is 50%. 

 

 

3. U-value (Thermal transmittance value)

The U-value represents the level of insulation so to speak. Its U-value is also diverse from 1.0(W/m2K) ~ 5.7(W/m2K). In Passive House standard it require 0.8(W/m2K).

 

4. Electricity generation efficiency

(Average power of 1 panel of conventional PV: 250W/ average full sun hours: 4hrs/ day ) 

Compared to average PV product it has 23% energy generation efficiency compare to conventional PV.

 

 

5. Price

In its website it says the minimum offer they have is $8.64/ sqf.