The values you use depend on the components of your setup. To make it a bit easier to follow, here’s a practical example. These values depend largely on the calculation of your solar panel’s efficiency, since the more energy it can convert to usable electricity, the less time it needs to charge your batteries. You now know how long it takes to charge your battery. Divide the above answer by your actual current (your answer to point 2).This gives you the actual battery capacity of your battery. Multiply your battery capacity by 85%.Multiply your above answer by 20%, and multiply that answer by 75%.Divide the solar panel wattage by battery voltage, giving you the input current (measured in amperes).We’ve broken it down so you can easily follow along. There are a few steps here, so stay with us. If you’re looking for a better quality battery for your setup, browse our LiFePo4 battery pack range for some affordable, durable options. Have a look at our solar depreciation calculator for more. If your battery can’t recharge fast enough, it’s safer to plug your appliance into a wall outlet to avoid battery degradation. If your battery can recharge faster than the appliance you want to use drains it, you’re safe to plug it in and use it.

If your battery isn’t big enough to run all the things you want to without keeping it above 50%, you can use this calculation to measure how quickly it can recharge. This means it won’t charge fully and you won’t be able to use it to its fullest capacity. If you allow your battery power to fall below 50%, it can cause it to degrade faster than usual. It might seem like overkill, but this calculation can save your battery over time. Solar Panel Charge Time Calculator: Why Do I Need It?Īs we mentioned above, the calculation tells you how long it takes for your battery to charge using power captured by your solar panel. To do this, you enter the various wattages of your solar panel and you can see which one will charge your battery the fastest. The charge time calculation also gives you an indication of how quickly your battery charges based on differently-sized solar panels.

Have a look at Texas’s solar panel cost and get started on your journey. Those in the sunniest areas of the country should really look into getting solar energy as a way of becoming energy independent.

Battery charge time calc