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Best Battery for 4kW Solar Panel System: Optimal Storage Capacity, Grid-Resale, 3600kWh Usage

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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #31 20982490
    michalPV
    Level 29  
    @bigszuszu, just as I was starting my own topic, someone there advised me to go for a microinverter, so after my experience with off-grid I will write the same:
    Just do on grid with microinverters. Simple, cheap, hassle-free, maintenance-free.
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  • #32 20982523
    bigszuszu
    Level 3  
    Unfortunately, I can`t feed the electricity into the grid - so I only have off-grid.
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  • #33 20982534
    vodiczka
    Level 43  
    bigszuszu wrote:
    Unfortunately, I am unable to feed electricity into the grid
    since you have the option of conscription
    bigszuszu wrote:
    I would like to install an off-grip installation (with the possibility of drawing electricity from the grid on bad days)
    you also have the opportunity to donate.
  • #34 21496696
    bachin
    Level 18  
    Until today there is a promotion on LiFePO4 here Link . 32 pcs. 320Ah can be gulped down for 6wheels, which gives a slightly different perspective on the cost-effectiveness of off-grid and on-grid. I've done some preliminary counting and 4 sets of 16 pcs each should come out at zero in 3 years at the current annual cost of 4k. Maybe a long time, maybe not, especially as autumn-spring will still be able to reheat, meaning less gas.
    So that I recommend, because as they say he who does not risk, does not eat ham.
    In June we will see what came of it. :P .
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Topic summary

The discussion revolves around selecting the optimal battery storage for a 4kW solar panel system, considering an annual electricity consumption of approximately 3600kWh. Participants highlight the high costs associated with energy storage, particularly with gel and lithium-ion batteries. It is suggested that for effective energy storage, a minimum of five 12V, 200Ah batteries would be necessary, with a total cost around PLN 2,500, and a replacement cycle of approximately every two years. The conversation also emphasizes the profitability of selling excess energy back to the grid rather than investing in batteries, especially given the potential for unfavorable weather conditions affecting solar energy production. The current average compensation for sold energy is discussed, with figures around 0.65 PLN per kWh mentioned. Overall, the consensus leans towards utilizing solar energy directly during the day and selling any surplus, rather than relying heavily on battery storage.
Summary generated by the language model.
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