If you have a new account but are having problems posting or verifying your account, please email us on for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact

Solar panels

  • 22-09-2015 10:26pm
    Closed Accounts Posts: 8,723 ✭✭✭

    Has anyone experience with running the daytime electricity cost of a geothermal system off a solar panel roof system, on a new house build?
    the geothermal system is going into the house anyway to run the underfloor heating.

    I'm trying to figure out what the excess power from a solar PV system would be used for? after heating water. and whether the running costs of a geothermal system would be offset by the solar panels
    Especially as there is no payment for excess power going back into the grid

    would it be worth installing a battery system to harness the excess power from the solar panels?


  • Registered Users Posts: 2 gpcmaccount


    I have solar PV on my house with batteries. The power usage goes as follows.

    First use -> Power home and appliance's (including your geo thermal pump)

    if you have excess energy then

    Second use -> Charge batteries

    if your batteries are charged and you still have excess then

    Third use -> Immersion hot water heating

    If you batteries are charged and the water is hot and you still have excess then

    Fourth use -> Send back to the grid

    Best charge controller make is victron

    Best inverters are either Fronius or solar edge

    Panels are cheap, the battery and inverter and charge controllers are where the cost is. Without them the panels are useless but get the best possible as yu want them to last.