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Old 08.07.2009, 10:10
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Re: Swiss regulations for installing, say, solar panels and selling back to the grid?

Thanks Mike. There's a fairly large barn next to the roundabout near Landi in Wädenswil which I have recently noticed has one roof side completely covered in Solar Panels - not one roof tile visible. So am interested how it works economically vs grants etc.

The questions I have, and mean to research at some point (but if you are asking anyway ... :-) are:

Just have water panel for generating hot water (so only savings are water heating)
or
Have (larger) panel for generating electric, use electric to heat water, sell back/reduce electric bill.

Are grants available for installation of both?

Can excess be sold back for cash or just to be offset as KWh credit against own use

Does +ve generation simply use existing infrastructure and turn meter backwards when +ve or need complex / additional physical connections / metering etc.

Another question about external heating I have posted in a separate thread so as not to hijack this one.
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Old 15.07.2009, 20:03
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Re: Swiss regulations for installing, say, solar panels and selling back to the grid?

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About 56% of Swiss generation is hydro, nuclear is about 38%. TOtal about 94% of "renewable / non-polluting", if you consider only the CO2 output and exclude radioactive waste. As such, impact of oil / gas / coal prices on price of electricity is reduced; further, "energetical independence" is less of an issue for the moment.
And that's why the solar panels are often mentioned in heating as a lot of housing use oil/mazout. In Switzerland, oil stands for almost 60% of the CO2 from heating.

However I must say that I'm quite lost when it comes to subsidies. I remember reading at the end of 2008 that putting solar panels up was an investment as the government would buy it at inflated price. It was so popular that their budget for it was empty in no time. I don't know how things are in 2009 though. Looking at I think it was the Swissolar site it says both the canton and the commune can probably subsidize you. Add selling electricity at inflated prices (especially if it's a secondary residence) and you've got quite a large support!
That being said I think you need to qualify depending on the subsidies, would be nice if any expert in this field could enlighten us.
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  #23  
Old 17.07.2009, 22:07
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Re: Swiss regulations for installing, say, solar panels and selling back to the grid?

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That being said I think you need to qualify depending on the subsidies, would be nice if any expert in this field could enlighten us.
Maybe a call to EWZ or similar would help. A Swiss colleague at work suggested that to get a meter for feeding into the grid was going to be expensive. Just as your ISP might mandate the modem you use, you have to use the gear that your local utility provides.
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Old 20.07.2009, 10:13
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Re: Swiss regulations for installing, say, solar panels and selling back to the grid?

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Thanks Mike. There's a fairly large barn next to the roundabout near Landi in Wädenswil which I have recently noticed has one roof side completely covered in Solar Panels - not one roof tile visible. So am interested how it works economically vs grants etc.

The questions I have, and mean to research at some point (but if you are asking anyway ... :-) are:

Just have water panel for generating hot water (so only savings are water heating)
or
Have (larger) panel for generating electric, use electric to heat water, sell back/reduce electric bill.

Are grants available for installation of both?

Can excess be sold back for cash or just to be offset as KWh credit against own use

Does +ve generation simply use existing infrastructure and turn meter backwards when +ve or need complex / additional physical connections / metering etc.

Another question about external heating I have posted in a separate thread so as not to hijack this one.
Solar panels for electricity are less than 50% efficient. Solar panels for heating water are far more efficient (don't have exact figures to hand). I did see a UK solar solution that combines solar heating with a small panel to generate energy for the pump.

From my understanding (and seen information in leaflets from EWZ) you can sell electricity into the Grid. This is paid at a higher rate that you are charge as this is 'Green Power' which can be sold by them at a premium.

As far as I know at the moment it will take ca. 20 years to recover the cost of your investment.

However this may change in the years to come as the volumes of solar panels increase, the price should come down, plus with new incentives to install solar panles creating subsidies.

Hedingen had a BIG solar project a few years ago.

In our town they generate heat using wood chippings (from locally grown trees). Apparently we are only using less than 30% of this renewable energy resource.
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