Solar PV new build


Registered User
Hi I am looking for some advice before I get onto my developer/builder.

I am getting a new build as part of a development. It will be A2 rated with a heat pump.

I am a little bit worried about electricity costs going up and up and wondered if it is worth looking at getting solar to power the heat pump. There are lots of different opinions via Google etc. Lack of solar power during winter, when the heat pump is used the most etc. Of course I cannot avail of any grant.

Is it really worth future proofing and getting solar pv as well as a Heat pump.

I guess it is something I can do later on but as we are about to put on the roof, it might be an idea.

Thanks for an advice/opinions.

Baby boomer

Registered User
At current prices, I'd say yes to solar panels. But a no (until prices drop further) to batteries. Electricity prices are only going in one direction and that's up, so the money you save will increase as energy prices rise.

How flexible is the builder though? Will they even allow a solar contractor onsite during the build?


Registered User
OP, before going down the road on solar panels etc I would first ascertain whether the house actually performs as an A2. It might. It might not. Knowing how much energy (electricity) you will need is the first question to be answered. You will only know this after you move in (and after 18 months approx if a concrete build).
Maybe have some of the infrastructure (cabling, grounds) done now while being built to make the install easier later on - maybe have a chat with a few solar pv installers for their advice.


Registered User
You need to research the current grant structure also. IIRC, the requirement for a house to be pre-2011 in order to avail of the grant is no longer in place (or is being removed shortly). This means you could have the house built and then avail of the grant (although this could well be more expensive than having PV added during construction).

The idea to suck it and see for a year or so is a good one. Invest in some energy monitors from the outset so you've a good idea of what your electricity consumption patterns are and then see how solar PV will fit.

Is there going to be someone at home full time during the day (when the panels will produce their most power)?

Solar PV will obviosuly tend to produce the most power at the exact opposite times to when most demand is on the heat pump. This is where battery storage starts to become more justified.

In terms of economics, a small system (which you use most of the electricity generated) is the quickest to pay off, a large system with battery packs may be greener and give you more self-sufficency but tends to take longer to break even. However if your building your own house, you might be able to add panels very cheaply at the time of construction, the panels themselves are inexpensive (€150 each or so) and it won't add much extra to the electrician to do either. This won't be the case if the hosue is in a development.


, a large system with battery packs may be greener and give you more self-sufficency but tends to take longer to break even.
I think calculations on current cost / savings still show these are unlikely to pay back the costs within their expected lifespan.