Technical aspect of a photovoltaic installation

[Cuicui]

Hello,
I create this new subject for use by those who have installed photovoltaic or who wish to do so, in order to exchange information and practical advice.
In order not to pollute this subject, thank you to those who wish to discuss the merits of such an installation for agreeing to do so in the subject "Unprofitable photovoltaic".

https://www.econologie.com/forums/photovolta ... t5452.html

A few comments :
- a photovoltaic installation in a low-income individual is only realistic if it is heavily subsidized and if EDF is committed to buying power at a high price for 20 years, which is currently the case. But we do not know yet the amount of subsidies for 2010.
- attention to cheap Chinese sensors: in case of a problem requiring the replacement of a panel, it may be difficult to find a panel of the same model. Prefer German material (a little more expensive), for example SolarWorld
- Some owners complain that their installation yet completed and functional is still not connected to the network after 6 months (loss of profit: 800 €). Choose an installer who has his entrances at EDF and who can make things happen.

[Cuicui]

I just received my first quote from an electrician from Gerardmer: 18500 € TTC monocrystalline solarworld panels. Expertise and authorization request to the town hall are my responsibility.
An electrician from Nomexy has just passed. He takes care of the expertise and authorizations: 16000 € TTC Chinese panels. I asked him for another quote with Solarworld. According to this installer, at 1 January 2010 the subsidy of the region will increase from 4500 € to 3 000 €. This decrease corresponds to one year of PV electricity production. It seems that the Lorraine region is a little outdated by the success of PV installations that are starting to cost him ...
Another installer comes tomorrow, another again the day after tomorrow.
I would like to sign before December 31!
To be continued...

[bobono]

the price for how much watts crushes ,,

[Cuicui]

the price for how much watts is crunching,

Hello Bobono
All these installations are as close as possible to the 3 kWh peak that an individual must not exceed. This usually runs around 2,9 kWh, depending on the panels.

[Cuicui]

All these installations are as close as possible to the 3 kWh peak that an individual must not exceed.

I just told a nonsense: an individual can install as much PV as he wants, but beyond 3 kWh the buy-back price by EDF halves and VAT increases (I do not have the exact figures).
The giant PV plants are therefore not as favored as the installations of less than 3 kWh.

[Christophe]

3 kWh crest sorry I do not know this unit ...

Please do not mix (it will never be repeated enough) kW power and kWh energy.

energy = power * duration

[Cuicui]

3 kWh crest sorry I do not know this unit ...
Please do not mix (it will never be repeated enough) kW power and kWh energy.
energy = power * duration

Correct me please. What is the correct writing for an installation producing 3 kW max per hour?

[Christophe]

If you speak in kWh then you have to relate to a measurement DURATION.

So 3kWh you can do on 20 years with a very small installation, it represents 0.017W on average ...

I think you mean 3kWc or 3kW crest!

It's not hard to remember: energy = time = hour = h in kWh!

The official unit is written kW.h or kWh and NOT kW / h the "/" is an ERROR but it is tolerated ... but it is as much an error as if I said that I was driving at a speed of 30 km !!!

In fact, we could very well speak in kWj (kW.day) but hey we will not confuse the spirits ...

[Cuicui]

I think you mean 3kWc or 3kW crest!

OK, thanks. I thought that 3 kW was a quantity of energy that could be consumed either in a short time (high power) or in a long time (low power), while 3 kWh it was a consumption per hour, so a precise power . I was wrong?

[Christophe]

Yeah, almost everything wrong! or so it's very badly said ...

The only thing that can be right is:

3 kWh it was the consumption per hour

Since an 3kW device will consume 3 kWh for one hour.