The expected power is not 25Wh/m2 on that period but between 15 and 20. So **24.5 is significantly more**.

It is

while make easy calculation:

3000kWh per 6 months, great 3MWh wow

BUT: 6months= 6*30.5 days= 183 days

so we get: 3000 kWh / 183 ~16 kWh/day

Is it 122 m2 instalation, so we get: 0.131kWh/m2/day

Now lets assume those bloody roads worked for those "great" results 8 hour a day, than we get: 0.016kWh/m2/hour =

**16 Wh/m2/hour ** I wish I made mistake, but probably not

Update: I've forgot hour in kW in a few places, but doesn't change to much.. corrected now.

Dave have on his 3000kWh per 6 months, but ~16 Wh/m2/hour it is nothing and people riding bicycle will easy save such amount of energy, by... driving 1km/h slower or slower on this path

BTW: Forgot to mention that even using not cheap electricity cost in my country it looks like those "solar roads" earned ~

**0.80 $ **/month/m2

Is it a joke?

In comparision another data:

This cheap savonius wind turbine output annual 1752 kWh (per 12 months I guess) using ONLY 9m2 wind swept area,

so we have

**16kWh/m2/month** and 146kWh/month ~5kWh/day assuming small investment not so bad

http://www.uvm.edu/extension/cropsoil/wp-content/uploads/savonius_windpower_report.pdfThey claim 2 years payback period invested ~1000$ if we consider only materials used for steel savonious wind turbine