And 30 years assuming the system runs at the same efficiency and requires no maintenance or replacement parts during all that time.
New solar PV and battery grant launched today
- Thread starter Zenith63
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And 30 years assuming the system runs at the same efficiency and requires no maintenance or replacement parts during all that time.
and assuming I live that long and don't move house - it's a terrible deal all round, the govt is going to have to do more to reduce energy use in old houses.
I've looked at solar PV, solar tubes, external insulation - none of them make any financial sense to retrofit at the current grant levels.
my attic is insulated, we replaced the boiler when we bought the house. Despite this, we still use a lot of gas as it's a 1970s building with no real wall insulation. My neighbour had external insulation done and it cost 14K - at best it might save me €500 a year, so 28 years to pay for itself. You might suggest it's worth doing anyway for the increased comfort in the house, and if you have the money just lying around then maybe so. But I think the govt is going to have to do more given it's EU obligations, and it's probably worth waiting to see what that is. The same goes for solar.
In the meantime, hit "boost"
Hi all
As the price of pv panels has come down considerably I said that I'd have a look at pv again so I got someone out to price it up for me .Heres my figures which seem to be starting to stack up .I have a big site so am looking at ground mounted although I could go with roof mounted as well although groundmounted will have better alignment.
Price for 6kw system with inverters and small 2.4 kw battery (just a buffer and have phev(10 kw battery) and looking at changing second car for ev through business ) is coming in at just under 10k .grant will be 3800 so that leaves me out of pocket by 6200 .If I can use all or most of 6kwh generated by pvs (big if )this would garner a saving of roughly 1k per annum giving a payback of 6-7 years ,possibly less given the possibility of carbon taxes and thus increase in energy bills .Am I missing something here ?
As the price of pv panels has come down considerably I said that I'd have a look at pv again so I got someone out to price it up for me .Heres my figures which seem to be starting to stack up .I have a big site so am looking at ground mounted although I could go with roof mounted as well although groundmounted will have better alignment.
Price for 6kw system with inverters and small 2.4 kw battery (just a buffer and have phev(10 kw battery) and looking at changing second car for ev through business ) is coming in at just under 10k .grant will be 3800 so that leaves me out of pocket by 6200 .If I can use all or most of 6kwh generated by pvs (big if )this would garner a saving of roughly 1k per annum giving a payback of 6-7 years ,possibly less given the possibility of carbon taxes and thus increase in energy bills .Am I missing something here ?
6kW is a lot of panel, but note that the 6kW rating is the theoretical peak output of the panels in very sunny locations, you'll get a lot less than that in practice over the course of the day. Solar systems in Ireland tend to deliver 75% of their annual output from May to September. The SEAI Solar [broken link removed] has more detail.
Location and panel orientation will be key factors in determining how many kWh you can generate over the course of a typical day. If you consume a lot of electricity in the mornings, better orient the panels so they are more east facing, west facing for usage later in the day.
This 2017 Solar PV where the sun doesn’t shine: paper goes into great detail on the viability of such systems here. They calculate a 21 year payback on a 6kW system in a high demand application. Increasing grants will have reduced that number, but not down to 6-7 years yet.
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Thanks for that Leo ,that report looks out of date price wise but the logic used is very interesting .Price wise if I was to use the example used of the domestic installation it would cost me 28 k to install a 6kW system so i think the price of pvs has come down drastically since it was published and combined with the grant it is as a carbon saving project starting to look very interesting .
It was published in 2017, using pre-grant numbers by the looks of it. Who is quoting ~10k for a 6kW system including battery? What size and brand panels are they suggesting? Going beyond 12sqm or 50% of roof area requires planning permission, I believe any ground installed system will require planning.
You're right, with a limit of 25sqm. So where is installing a 6kw system with battery for €10k?
Again, can you name any of these? Wholesale suppliers are no good if you want to avail of the grant.
To get to 6kW, you're looking at 30sqm of those panels, so you will need to go down the planning route.
You can opt for up to a 4kW system with battery, but the grant for the panel element hits the max at 2kW. Average household electricity consumption in Ireland is 11kWh per day, so 4kW of solar or above is overkill in most cases. Too much solar supply causes efficiency problems for the grid too, with large peaks during the middle of the day when demand is at its lowest.
Grant is 3800 max
700 per kw installed up to 4kw
1000 for a battery
However once you go over 2k you have to get a battery.
You to get the max grant the govt are requiring households to have to get PP for the install. However that isn't mentioned in the scheme.
700 per kw installed up to 4kw
1000 for a battery
However once you go over 2k you have to get a battery.
You to get the max grant the govt are requiring households to have to get PP for the install. However that isn't mentioned in the scheme.
I'm not in the industry but curious who's quoting 10k for a 6kW system with 2.4kWh battery.
I'm not interested in installing though, they payback is still too long to make sense.
Yeah, the only way I see it making any sense at the moment is for a new build to hit the required energy rating.