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Asked: September 3, 20222022-09-03T21:00:45+00:00 2022-09-03T21:00:45+00:00In: Electronic & Electrical

How many solar panels do I need to charge a 100Ah battery in 5 hours?

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How many solar panels do I need to charge a 100Ah battery in 5 hours?
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  1. Rakthim Teacher
    2022-09-03T21:01:46+00:00Added an answer on September 3, 2022 at 9:01 pm

    The charging period is determined by many factors such as weather conditions, type of battery, and its physical condition. A healthy and new battery will be charged a lot quicker than an old one, for example. Theoretically speaking, you’ll need one solar panel of 240 watts to charge your 100Ah battery in 5 hours or 2 panels of 120 watts wired in series.

    Deep cycle batteries have an average operating temperature, storage temperature, and operational charge temperature specifications listed. All batteries have a defined working environment, storage, and charging conditions as per the manufacturer’s advice. The recommended operating temperature for solar batteries is 77°F plus or minus 5.4°F.

    Knowing how many solar panels it takes to charge a specific battery capacity is crucial to know when planning your solar system. You should also know your average power consumption before choosing your battery and its charge capacity. As a general rule of thumb, I recommend getting 250 watts of solar panels for every 100Ah of batteries capacity.

    Remember, this is to have a rough idea of your needs, and it depends on many other factors. Lithium iron phosphate batteries are the most expensive solar battery option. They have an extremely long cycle life, high DoD, and charging ratings. This type of battery is compact and very lightweight compared to AGM batteries and requires little to no maintenance.

    With a 100% DoD, this battery does not lose capacity when idle, making them the best solar panel Texas battery on the market. With a life expectancy of about 10 years, this is a worthy investment and is the perfect fit for off-grid solar installations on RVs.

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  2. Rakthim Teacher
    2022-09-03T21:02:02+00:00Added an answer on September 3, 2022 at 9:02 pm

    A single 100w 12v Monocrystalline Solar panel will do the full charging of your 100ah 12v batteries in under 5–6 hours of peak sunlight but if you could get 2 pieces of a 150w 12v Monocrystalline Solar panels connected in parallel to maintain same voltage and then using a high quality mppt 10 or 20a charge controller, you can achieve that in under 2-3 hours of peak sunlight and that’s like a 55% decrease in the overall charging duration.

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