The Electric Vehicle Thread

Presumably you need both ?

I think itā€™s a combination of not needing slates + roofing labour + panels, as opposed to purely slates v panels pricing.

I passed a renovated house recently where they had gotten the panels instead of tiles. Seems like a great job, but I donā€™t know what the longevity is like?

Nope. New solution where you fit panels instead of slates. Saves on slate and labour costs.

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I think the panels are slightly less efficient but seems an obvious thing to fit on every new home or roof restoration.

The likes of @Gman trying to hawk old broken slate tiles probably wonā€™t be telling his poor customers though.

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Thatā€™s a gamechanger

Solution for Old Trafford ?

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Yeah my house is airtight, walls pumped and insulates etcā€¦ I looked into heat pump and they told me if I wanted to do it with grant the inspector would insist I replace all my (approx 13 years old) radiators and it was probably going to outweigh the value of the grant

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The reason for radiator replacement is to allow heat to be distributed properly. Your radiators were designed for an oil/gas boiler where the water was typically at 65 degrees where as a heat pump will distribute water at a lower temperature, typically about 45 degrees. So a larger surface area is required.

Iā€™ve seen rough quotes of around 13500K for this type of work. 12K for the heat pump and 1500K for the rads. Youā€™ll get a 6500 grant back on this which gives you a net cost of 7K.

Very rough calcs based on SEAI price statistics below. Remember a properly commissioned heat pump should give on average 3.5 units of heat out for every unit of electricity you give it. For the purposes of this example iā€™ll leave it at 3.25

Sample house uses 12000 Kwh per year. Average running costs for the yearā€¦

Oil = 12000 x 0.143 = 1710 EURO
Heat Pump = 12000 X (0.26/3.25) = 960 EURO

So you are saving 750 euro per year vs oil which gives a 9-10 year payback.

Benefits: A nice ambient temperature across the house 24 x7.

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In addition to the aboveā€¦ on paper as more renewable are added to the grid the price of electricity should inflate at a lower rate than the price of oilā€¦ youā€™ll notice the gap is starting to close already.

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Heated the house for less than 700 last year with the heat pump. God bless the modern country pile

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Yip, newly built homes would have a lower heat demand.

We got the oul fella an electric bike for his birthday. He says itā€™s the best present he ever got in his life.

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You either have a very large house or something wrong there. Thatā€™s a very large bill for a very well sealed modern house. Iā€™ve never seen a 2 month bill higher than 360ā‚¬ in the deepest of cold winter with our heat pump and Iā€™m pretty sure it could be run more efficiently that it is, I just donā€™t have the know how

Is that a very small house?

Not sure nowadays if itā€™s very small, itā€™s 2700 sq ft

I donā€™t have MHRV fitted, the lad doing the house had it and told me it was a cod ? Iā€™m thinking of installing a large narrow vent in the ceiling above a wood fired stove in the living room and ducting the warm air to other areas of the house by way of low volume inline fans. The room where the stove is can get too warm at times and Iā€™m thinking why not distribute this and reduce the work the heat pump has to do. Anybody got an opinion on this ?

I misled you unfortunately; the previous bill was underestimated and had to make up after the meter was read. The lesson was learned to submit my own readings after. I got the 750 euro bill in February 2020.

The most expensive one Iā€™ve had to date this year is up against 500. The house is 2200 square feet. I have got the pump serviced the past few years so donā€™t think pump is the issue

Thatā€™s a big house. Is your heat pump geothermal? That ridiculously low esb bills for winter. I would average ā‚¬1850 a year with one bill up around 400 for 2 months in the winter.

The very same thing happened to me after moving and and for the next bill also. Took about 3 billing cycles to settle down

Just after doing a comparison with last year and my bills are on track to be lower this year than last despite the increase in the rate.

This is my 4th full year in the house.

Ive been happy enough with them up to recently myself. This winter will see a huge increase if course. The wife reckons we were getting robbed with ESB bills but sheā€™s forgetting about the ā‚¬1700 a year we were spending on oil every year in a much smaller house.

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