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Heating Water with Solar Panels

  • 20-09-2024 10:23pm
    #1
    noelfitz
    Registered Users Posts: 138 ✭✭


    Recently I got solar panels and want to know the best way to heat water. In the past I set the timer to heat water using gas at 7 am for an hour daily. With solar panels should I use boost for an hour every morning or is there a better way to heat water?

    I include the system I have for gas and electricity. Please let me know if my discussion is in the correct place and I would very much appreciate support.

    *** *** ***

    PV System (Solar Panels System) supplied by Ecoplex

    12 Jinko panels (0.430 x 12 = 5.16kW)

    12 Optimisers (as trees near the house)

    Solis hybrid inverter (single phase, 3.6kW)

    Myenergi hot water diverter (eddi, model 16A1P01H, single phase smart solar diverter)

    Shunt

    Ber testing and report

    On my phone I have myenergi app.

    Electric Heaters

    4 electric heaters, one is a Dimplex, model ECR20, 1.85- 2.00kW, which is a 2kW oil free column radiator. The others are also Dimplex heaters.

    Gas System

    Viessmann vitodens 100 - Gas condensing boiler

    EPH Controls which independently regulate hot water and central heating.

    Energy Suppliers

    Electricity, Yuno, contract ends 19 Sept 2025.

    Gas, Flogas, contract ends 16 Nov 2024.



Comments

  • #2
    bullit_dodger
    Registered Users, Registered Users 2 Posts: 2,570 ✭✭✭bullit_dodger


    Assuming your on Day/Night rate, then (at the moment) night time rate is from midnight to 9am. When the hour goes back, this also moves back to 11pm→ 8am.

    Since Night rate is generally cheaper than what you get paid via FIT (feed-in-tarrif), your best logic is to set your Eddi to heat the water at 7:30am for 1.5 hrs, or however long it takes to heat your immersion tank….and then export the electricity you generate from solar during the day.

    Just don't forget to change your schedule in the Eddi when the clocks move back end of Oct by an hour. Basically you want to also heat the water on night rate.

    If you are not on D/N rate, then the strategy is different.



  • #3
    Cypher_sounds
    Registered Users, Registered Users 2 Posts: 8,159 ✭✭✭Cypher_sounds


    Also if you have the EV rate at night 2/5am, it would be more frugal to boost the cylinder via the Eddi then I'd imagine.



  • #4
    noelfitz
    Registered Users Posts: 138 ✭✭noelfitz


    Thanks for reply.

    I do not have a battery, what I have is shown below. So perhaps I am OK now about heating water.

    My next concern is heating the house, but I will raise this in a separate discussion.

    Thanks to all who have helped me.

    *** *** ***

    PV System (Solar Panels System) supplied by Ecoplex.

    12 Jinko panels (0.430 x 12 = 5.16kW)

    12 Optimisers (as trees near the house)

    Solis hybrid inverter (single phase, 3.6kW)

    Myenergi hot water diverter (eddi, model 16A1P01H, single phase smart solar diverter)

    Shunt

    Ber testing and report

    On my phone I have myenergi app

    Electric Heaters

    4 electric heaters, one is a Dimplex, model ECR20, 1.85- 2.00kW, which is a 2kW oil free column radiator. The others are also Dimplex heaters.

    Gas System

    Viessmann vitodens 100 - Gas condensing boiler

    EPH Controls which independently regulate hot water and central heating.

    Energy Suppliers

    Electricity, Yuno, contract ends 19 Sept 2025

    Gas, Flogas, contract ends 16 Nov 2024. Plan Name: FixedDiscount 24H, Monthly Payment Day: 4



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