Smart energy on a self build means the heat pump, the solar panels, the battery and the car charger share one plan, so the house uses its own power first and buys the rest at the cheapest hours. On a rural Cork site, where the solar often sits on a garage or shed and the charger may be out in the yard, the plan has to start with the cables between the buildings. Here is how we approach it, and what to settle before the groundworks and first fix.
This guide is for people building their own home around Cork, from a farmhouse site near Macroom or Bandon to a family plot outside Midleton or Fermoy, where the house, the garage and the yard are often spread across a good stretch of ground.
What smart energy means in a one off house
The SEAI page on smart energy technologies sets out the idea plainly. Surplus solar power can be exported to the grid or stored in a battery for the evening. Battery storage holds that surplus for later, when generation is lower or prices are highest. Smart chargers can schedule car charging for the hours when the panels produce most, or follow a smart tariff that avoids the peak. And an energy management system keeps track of what the house produces and what it uses.
None of that happens by itself. Each piece of equipment has its own controller, and they only cooperate if they can see each other on the network and follow the same rules.
Smart energy across the house, the garage and the yard
On a rural site the equipment rarely sits in one room. A typical layout we plan for looks like this:
| Where | Equipment | What it needs |
|---|---|---|
| Garage or shed roof | Solar panels | A power cable and a data link back to the house, in a duct laid with the groundworks |
| Garage, utility or plant room | Inverter and battery | A wired network connection, ventilation, and space the electrician has agreed |
| Plant room or outside wall | Heat pump and its controller | A Cat6 cable from the controller to the comms cabinet |
| Yard, gable or drive | Car charger | Its supply cable and a Cat6 cable, so it is not relying on Wi-Fi |
| Comms cabinet in the house | Network and control equipment | Links to every building, and power that stays on as long as possible |
A network cable is good for about 100 metres, so a garage or shed further away than that needs a fibre link or a network switch part way, planned at the same time as the trench. Our guide to solar panels for a Cork self build covers putting the panels on a garage roof, and our Cork EV charger wiring guide covers long drives and detached garages.
Who should be in charge: the inverter, the charger or a control system?
There are three common ways to set it up, and the right one depends on how much you want to see and change.
- Let the inverter lead. Many hybrid inverters can manage their own battery and send surplus to a charger or immersion from the same maker. Simple, but you are usually tied to that maker.
- Let a smart charger lead. Some chargers read the solar surplus and charge the car from it. Good for the car, but they do not run the heat pump or the hot water.
- Put a control system above them. A home automation system reads the inverter, the battery and the charger over the local network and applies your rules to all of them, along with the lights, the heating and the alarm.
Whichever you choose, ask each supplier before you order whether their equipment can be monitored and controlled on the local network, not only through a phone app and a cloud service. That one question saves a lot of trouble later.
The heat pump and the hot water
A heat pump is happiest left to run steadily, so we rarely chase it hour by hour. The hot water cylinder is a different story: heating it from a sunny afternoon's surplus, or overnight on a cheap rate, is one of the easiest gains in the house. Our heat pump controls guide for self builders explains the thermostats, the zones and the link to the smart home. We do not supply or install heat pumps; we wire and programme the controls that work with them.
Storms, power cuts and the battery
Rural homes can lose power in winter storms, and many people assume a home battery will carry the house through. It only does if the inverter offers backup power and the circuits are arranged for it, and even then it is usually a few chosen circuits rather than the whole house. Decide early which ones matter to you, such as the fridge, the well pump, the network and a few lights, so the electrician can wire the board to suit. A small backup supply in the comms cabinet keeps the network and the control system running long enough to report what happened.
Kieran McGuire, who founded 1Install, is an electrician, as are a few of the people who work with him, so the cable schedule we hand to your electrician is written in their language. Our survey and design service brings the solar, battery, charger, heat pump controls and network into one set of drawings, and our page on smart homes for farms and rural houses shows how we handle spread out sites.
Seeing it all in one place
As a Crestron Elite Partner whose founder holds every Crestron certification, 1Install can do this with Crestron Home: we put solar output, battery level and car charging on the same screen as the lights and the heating, and make a "going out" scene that also pauses charging and sets back the heating. Our Crestron page for Cork and our home automation page show more. For a simpler house, well matched equipment that follows your tariff may be all you need, and we will tell you so.
A design consultation or site survey costs 440 euro plus VAT and covers up to 4 hours, enough for most one off houses.
Questions we are often asked
Is smart energy worth it without a battery?
Yes. Using the solar surplus for hot water and the car, and shifting large loads to cheap hours, gives most of the benefit. A battery adds the evening.
Can the solar panels go on a detached garage?
Often, yes, and it keeps the house roof clear. Lay a duct for the power and data cables between the garage and the house with the groundworks.
Will my car charger work if the Wi-Fi drops?
A wired Cat6 connection is far more reliable than Wi-Fi in a yard or garage, so we always run one. Many chargers will still charge without a connection, but they lose their smart features.
Who looks after each part once it is in?
The heat pump installer looks after the heat pump. Where we fit the solar panels, battery or car charger we look after those too, along with the network, the controls and the programming that link everything together.
Can I start simple and add a control system later?
Yes, if the cables are in and the equipment can be controlled on the local network. That is why both matter at the build stage.
All of this relies on a network that reaches every building on the site. Send us your floor plans and site layout and we will mark the Wi-Fi access points, list the Cat6 runs back to one comms cabinet and send a priced kit list, free and with no obligation; see our free Wi-Fi design for self builders.
Book a consultation or call our Cork office on 021 202 8107.
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