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How many solar panels does it take to charge a 200Ah lithium battery?

Summary. You need around 610 watts of solar panels to charge a 12V 200Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller.

footprinthero.com - Solar Panel Size Calculator: What Size Panel Do I Need?

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Use our calculator to find out what size solar panel you need to charge your battery. Battery Voltage (V) Error: This field is required. Battery Amp Hours (Ah) Error: This field is required. Battery Type Select a type Lead acid Lithium (LiFePO4) Error: Select a battery type. Battery Depth of Discharge (DoD) Optional: If left blank, we’ll use a default value of 50% DoD for lead acid batteries and 100% DoD for lithium batteries. Solar Charge Controller Type Select a type PWM MPPT Error: Select a charge controller type. Desired Charge Time (in peak sun hours) You can use our peak sun hours calculator to find out how many peak sun hours your locations gets per day. Error: This field is required. Calculate Solar Panel Size Estimated solar panel size: watts Warning: We estimate that a solar power system with these parameters would have a maximum charge current of . Many battery manufacturers recommend a maximum charge current of for lead acid batteries with this capacity. To maximize your battery’s lifespan, consider using a smaller solar panel or a bigger battery. Or increase your desired charge time. Warning: We estimate that a solar power system with these parameters would have a maximum charge current of . Many battery manufacturers recommend a maximum charge current of for lithium iron phosphate batteries with this capacity. To maximize your battery’s lifespan, consider using a smaller solar panel or a bigger battery. Or increase your desired charge time. Error: We estimate that it is impossible to charge your battery this quickly. The typical absorption time for batteries is around hours, which is greater than (or equal to) your desired charge time. Increase your desired charge time and try again. Note: If you already have a solar panel size in mind and instead want to estimate how long it will take to charge your battery, check out our solar panel charge time calculator.

Calculator Assumptions

The solar charge controller is the only load connected to the battery

What Size Solar Panel Do I Need?

To find out what size solar panel you need to charge your battery, you’ll need to enter the following info into our solar panel size calculator at the top of this page:

Battery Voltage (V): What is your battery’s voltage? Battery Amp Hours (Ah): What is your battery’s capacity in amp hours? (If you only know its capacity in watt hours, first convert watt hours to amp hours) Battery Type: Is your battery a lead acid or lithium (LiFePO4) battery? Battery Depth of Discharge (DoD): What level of discharge is your battery at? 100% means fully discharged and 0% means fully charged. Solar Charge Controller Type: Will you be using a PWM or MPPT charge controller? Desired Charge Time (in peak sun hours): How quickly do you want your solar panel to charge your battery, in peak sun hours?

Once you’ve entered the above info, click “Calculate Solar Panel Size” to get an estimate of what size panel you need to charge your battery at your desired speed.

Example

Let’s say you have a 12V 100Ah LiFePO4 battery and an MPPT charge controller in your RV. You want a solar panel that will charge your battery in 16 peak sun hours. To find out what size solar panel you need, you’d simply plug the following into the calculator: Battery Voltage (V): 12 Battery Amp Hours (Ah): 100 Battery Type: Lithium (LiFePO4) Battery Depth of Discharge (DOD): 100% Solar Charge Controller Type: MPPT Desired Charge Time (in peak sun hours): 16 Turns out, you need a 100 watt solar panel to charge a 12V 100Ah lithium battery in 16 peak sun hours with an MPPT charge controller.

What Size Solar Panel to Charge 12V Battery?

12 volt batteries are the most common voltage I see people using in their solar power setups. Here is a chart showing what size solar panel you need to charge 12V batteries of various capacities in 5 peak sun hours with an MPPT charge controller. Battery Amp Hours (Ah) Battery Type Estimated Solar Panel Size 50Ah Lithium (LiFePO4) 160 watts 60Ah Lithium (LiFePO4) 190 watts 80Ah Lithium (LiFePO4) 250 watts 100Ah Lithium (LiFePO4) 310 watts 120Ah Lithium (LiFePO4) 370 watts 140Ah Lithium (LiFePO4) 430 watts 200Ah Lithium (LiFePO4) 610 watts 50Ah Lead acid 120 watts 60Ah Lead acid 140 watts 80Ah Lead acid 180 watts 100Ah Lead acid 220 watts 120Ah Lead acid 260 watts 140Ah Lead acid 300 watts 200Ah Lead acid 430 watts

Summary

You need around 200-400 watts of solar panels to charge many common 12V lithium battery sizes from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge many common battery sizes from 100% depth of discharge in 5 peak sun hours with an charge controller. You need around 150-300 watts of solar panels to charge many common 12V lead acid battery sizes from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller.

Full article: What Size Solar Panel to Charge 12V Battery?

What Size Solar Panel to Charge 100Ah Battery?

12V 100Ah batteries are some of the most common in solar power systems. Here are some tables with the solar panel sizes you need to charge them at various speeds:

12V 100Ah Lithium Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 310 watts 10 peak sun hours MPPT 160 watts 15 peak sun hours MPPT 110 watts 20 peak sun hours MPPT 80 watts 25 peak sun hours MPPT 70 watts 5 peak sun hours PWM 380 watts 10 peak sun hours PWM 190 watts 15 peak sun hours PWM 130 watts 20 peak sun hours PWM 100 watts 25 peak sun hours PWM 80 watts

Summary

You need around 310 watts of solar panels to charge a 12V 100Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 100Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an charge controller. You need around 380 watts of solar panels to charge a 12V 100Ah lithium battery from 100% depth of discharge in 5 peak sun hours with a PWM charge controller.

Full article: What Size Solar Panel to Charge 100Ah Battery?

12V 100Ah Lead Acid Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 220 watts 10 peak sun hours MPPT 100 watts 15 peak sun hours MPPT 70 watts 20 peak sun hours MPPT 50 watts 25 peak sun hours MPPT 40 watts 5 peak sun hours PWM 270 watts 10 peak sun hours PWM 120 watts 15 peak sun hours PWM 80 watts 20 peak sun hours PWM 60 watts 25 peak sun hours PWM 50 watts

Summary

You need around 220 watts of solar panels to charge a 12V 100Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 100Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an charge controller. You need around 270 watts of solar panels to charge a 12V 100Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with a PWM charge controller.

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What Size Solar Panel to Charge 50Ah Battery?

The 12V 50Ah battery is another common battery size in solar power systems. Some car batteries are also 50Ah. Because lead acid batteries only have 50% usable capacity, a 50Ah LiFePO4 battery has as much usable capacity as a 100Ah lead acid battery.

12V 50Ah Lithium Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 160 watts 10 peak sun hours MPPT 80 watts 15 peak sun hours MPPT 60 watts 20 peak sun hours MPPT 50 watts 25 peak sun hours MPPT 40 watts 5 peak sun hours PWM 200 watts 10 peak sun hours PWM 100 watts 15 peak sun hours PWM 70 watts 20 peak sun hours PWM 50 watts 25 peak sun hours PWM 40 watts

Summary

You need a 160 watt solar panel to charge a 12V 50Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 50Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an charge controller. You need a 200 watt solar panel to charge a 12V 50Ah lithium battery from 100% depth of discharge in 5 peak sun hours with a PWM charge controller.

12V 50Ah Lead Acid Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 120 watts 10 peak sun hours MPPT 60 watts 15 peak sun hours MPPT 40 watts 20 peak sun hours MPPT 30 watts 25 peak sun hours MPPT 30 watts 5 peak sun hours PWM 140 watts 10 peak sun hours PWM 70 watts 15 peak sun hours PWM 40 watts 20 peak sun hours PWM 30 watts 25 peak sun hours PWM 30 watts

Summary

You need a 120 watt solar panel to charge a 12V 50Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 50Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an charge controller. You need a 140 watt solar panel to charge a 12V 50Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with a PWM charge controller.

What Size Solar Panel to Charge 120Ah Battery?

12V 120Ah Lithium Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 370 watts 10 peak sun hours MPPT 190 watts 15 peak sun hours MPPT 130 watts 20 peak sun hours MPPT 100 watts 25 peak sun hours MPPT 80 watts 5 peak sun hours PWM 460 watts 10 peak sun hours PWM 230 watts 15 peak sun hours PWM 150 watts 20 peak sun hours PWM 120 watts 25 peak sun hours PWM 90 watts

Summary

You need around 370 watts of solar panels to charge a 12V 120Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 120Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an charge controller. You need around 460 watts of solar panels to charge a 12V 120Ah lithium battery from 100% depth of discharge in 5 peak sun hours with a PWM charge controller.

12V 120Ah Lead Acid Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 260 watts 10 peak sun hours MPPT 120 watts 15 peak sun hours MPPT 80 watts 20 peak sun hours MPPT 60 watts 25 peak sun hours MPPT 50 watts 5 peak sun hours PWM 330 watts 10 peak sun hours PWM 150 watts 15 peak sun hours PWM 100 watts 20 peak sun hours PWM 70 watts 25 peak sun hours PWM 60 watts

Summary

You need around 260 watts of solar panels to charge a 12V 120Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 120Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an charge controller. You need around 330 watts of solar panels to charge a 12V 120Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with a PWM charge controller.

What Size Solar Panel to Charge 140Ah Battery?

12V 140Ah Lithium Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 430 watts 10 peak sun hours MPPT 210 watts 15 peak sun hours MPPT 150 watts 20 peak sun hours MPPT 110 watts 25 peak sun hours MPPT 90 watts 5 peak sun hours PWM 530 watts 10 peak sun hours PWM 270 watts 15 peak sun hours PWM 180 watts 20 peak sun hours PWM 140 watts 25 peak sun hours PWM 110 watts

Summary

You need around 430 watts of solar panels to charge a 12V 140Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 140Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an charge controller. You need around 530 watts of solar panels to charge a 12V 140Ah lithium battery from 100% depth of discharge in 5 peak sun hours with a PWM charge controller.

12V 140Ah Lead Acid Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 300 watts 10 peak sun hours MPPT 140 watts 15 peak sun hours MPPT 90 watts 20 peak sun hours MPPT 70 watts 25 peak sun hours MPPT 60 watts 5 peak sun hours PWM 380 watts 10 peak sun hours PWM 170 watts 15 peak sun hours PWM 110 watts 20 peak sun hours PWM 80 watts 25 peak sun hours PWM 70 watts

Summary

You need around 300 watts of solar panels to charge a 12V 140Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 140Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an charge controller. You need around 380 watts of solar panels to charge a 12V 140Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with a PWM charge controller.

What Size Solar Panel to Charge 200Ah Battery?

Because lead acid batteries only have 50% usable capacity, 200Ah lead acid batteries have as much usable capacity as 100Ah lithium iron phosphate batteries.

12V 200Ah Lithium Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 610 watts 10 peak sun hours MPPT 300 watts 15 peak sun hours MPPT 200 watts 20 peak sun hours MPPT 150 watts 25 peak sun hours MPPT 130 watts 5 peak sun hours PWM 760 watts 10 peak sun hours PWM 380 watts 15 peak sun hours PWM 250 watts 20 peak sun hours PWM 190 watts 25 peak sun hours PWM 150 watts

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You need around 610 watts of solar panels to charge a 12V 200Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 200Ah lithium battery from 100% depth of discharge in 5 peak sun hours with an charge controller. You need around 760 watts of solar panels to charge a 12V 200Ah lithium battery from 100% depth of discharge in 5 peak sun hours with a PWM charge controller.

12V 200Ah Lead Acid Battery

Charge Time Charge Controller Type Estimated Solar Panel Size 5 peak sun hours MPPT 430 watts 10 peak sun hours MPPT 200 watts 15 peak sun hours MPPT 130 watts 20 peak sun hours MPPT 100 watts 25 peak sun hours MPPT 80 watts 5 peak sun hours PWM 540 watts 10 peak sun hours PWM 240 watts 15 peak sun hours PWM 160 watts 20 peak sun hours PWM 120 watts 25 peak sun hours PWM 90 watts

Summary

You need around 430 watts of solar panels to charge a 12V 200Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge a 12V 200Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with an charge controller. You need around 520 watts of solar panels to charge a 12V 200Ah lead acid battery from 50% depth of discharge in 5 peak sun hours with a PWM charge controller.

What Size Solar Panel to Charge 24V Battery?

24 volt batteries aren’t as easy to find as 12 volt batteries, but you can connect two 12V batteries in series to create a 24V battery bank. Some battery brands sell twin packs of 12V batteries for just this reason. Here is a chart showing what size solar panel you need to charge 24V batteries of various capacities in 5 peak sun hours with an MPPT charge controller. Battery Amp Hours (Ah) Battery Type Estimated Solar Panel Size 50Ah Lithium (LiFePO4) 310 watts 100Ah Lithium (LiFePO4) 610 watts 200Ah Lithium (LiFePO4) 1200 watts 50Ah Lead acid 220 watts 100Ah Lead acid 430 watts 200Ah Lead acid 850 watts

Summary

You need around 300-600 watts of solar panels to charge common 24V lithium battery sizes from 100% depth of discharge in 5 peak sun hours with an MPPT charge controller. to charge common battery sizes from 100% depth of discharge in 5 peak sun hours with an charge controller. You need around 200-450 watts of solar panels to charge common 24V lead acid battery sizes from 50% depth of discharge in 5 peak sun hours with an MPPT charge controller.

What Are Peak Sun Hours?

Peak sun hours (also called “peak sunlight hours” or simply “sun hours”) are a way to measure how much sunlight you can expect to receive at a specific location. A peak sun hour is defined as one hour in which the intensity of sunlight (solar irradiance) averages 1,000 watts per square meter.

So we can write it as:

1 peak sun hour = 1,000 W/m2 of sunlight per hour.

Because 1,000 watts is equal to 1 kilowatt, we can also write it as:

1 peak sun hour = 1 kW/m2 of sunlight per hour.

Peak hours are NOT the hours from sunrise to sunset. They are also NOT the number of hours the sun shines in a day. They are instead a measure of the total amount of sunlight a location gets in a day. If one day from 9am to 10am the sun shines with an average intensity of 400 W/m2, then that would be equal to 0.4 peak sun hours. Then if from 1pm to 2pm that same day the sun shines with an average intensity of 1,050 W/m2, that would be equal to 1.05 peak sun hours. For example, let’s say you live in Nevada, and on a clear spring day the sun shines with the following intensities by hour:

6am: 50 W/m 2 = 0.05 peak sun hours

50 W/m = 0.05 peak sun hours 7am: 100 W/m 2 = 0.1 peak sun hours 100 W/m = 0.1 peak sun hours 8am: 200 W/m 2 = 0.2 peak sun hours 200 W/m = 0.2 peak sun hours 9am: 400 W/m 2 = 0.4 peak sun hours 400 W/m = 0.4 peak sun hours 10am: 700 W/m 2 = 0.7 peak sun hours 700 W/m = 0.7 peak sun hours 11am: 950 W/m 2 = 0.95 peak sun hours 950 W/m = 0.95 peak sun hours 12pm: 1,000 W/m 2 = 1 peak sun hour 1,000 W/m = 1 peak sun hour 1pm: 1,000 W/m 2 = 1 peak sun hour 1,000 W/m = 1 peak sun hour 2pm: 950 W/m 2 = 0.95 peak sun hours 950 W/m = 0.95 peak sun hours 3pm: 700 W/m 2 = 0.7 peak sun hours 700 W/m = 0.7 peak sun hours 4pm: 400 W/m 2 = 0.4 peak sun hours 400 W/m = 0.4 peak sun hours 5pm: 200 W/m 2 = 0.2 peak sun hours 200 W/m = 0.2 peak sun hours 6pm: 100 W/m 2 = 0.1 peak sun hours 100 W/m = 0.1 peak sun hours 7pm: 50 W/m2 = 0.05 peak sun hours To measure how much sun you got that day, you’d sum up the intensity of sunlight for each hour in peak sun hours. In this case, you would have received 6.8 peak sun hours that day.

Why Use Peak Sun Hours?

Sunlight varies in intensity by location and time of day. The sun shines more intensely at 1pm in Arizona than it does at 8AM in Alaska. So if we were just to measure the length of time sun shines on a solar panel, it wouldn’t give us a very clear idea of how much energy that solar panel generated during that time. We need to know how intense that sunlight was. By measuring the sunlight in peak sun hours, we can quantify how much sunlight a solar panel receives. Then we can use that number to better estimate how much solar energy was generated during that time. Plus, we can use historical data to predict how many peak sun hours a location will get on an average day. These predictions help when picking what size solar panel or system to use.

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footprinthero.com - Solar Panel Size Calculator: What Size Panel Do I Need?

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