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40 panels -3 5kw batteries-what can this power? ?

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  • 23-09-2023 7:01pm
    #1
    pureza
    Registered Users Posts: 1,122 ✭✭✭


    This is being installed on shed roof 's here

    Currently the ESB supply for the business is coming from its own single phase 15kw transformer

    The roof's are SE facing and get sun/unshaded daylight this week until maybe 5 or 6 in the evening from early morning

    That time frame shortening every day obviously

    Bar it's snowing, what could I expect from those ball park in deepest darkest winter ?

    Apologies for the nooby type questions

    The business will be funding the installation taking advantage of accelerated capital depreciation ie writing off most of the cost in year one so a no brainer justifiability wise from that perspective

    Plus I like the idea of being largely self sufficient or hugely reducing our electricity bill/carbon footprint

    In the last year we spent about 7000 euros on power but that was on a good rate 39% discount from Bord Gais

    We have a day and night meter with 30% at the lower night rate

    Total power usage in july August was about 3200 units

    In 5 winter months,it's closer to 5000 units


    So let's guess 46000 units used in a year


    Thoughts and your much more knowledgeable opinions than me welcome, thank you

    If there's anything extra you need to know,I'll try to get it



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    #2
    graememk
    Moderators, Home & Garden Moderators Posts: 5,974 Mod ✭✭✭✭graememk


    40 panels, roughly 400w per panel now about 16kwp

    Say your inverters? Are 2* 6kw?

    Can you export at full power? (Assuming nc7)

    I dare say you should be hitting 12-13MWh per year.



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    #3
    yankinlk
    Registered Users Posts: 2,734 ✭✭✭yankinlk


    Use this solar estimate link from the FAQ https://re.jrc.ec.europa.eu/pvg_tools/en/#PVP

    Put in your address, add the system size # panels x wattage of each. Put in your roof direction and pitch angle of roof. If you have two directions...ie east west you need to do this twice with say half the panel count and add up the result.

    The graph will show you exactly what you will get each month.



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