How Long To Charge 200ah Battery? + Calculator

In general, 12v 200ah lead-acid battery from 50% Depth of discharge will take anywhere between 17.5 (using 100 watt solar panel) to 1.7 peak sun hours (using 1000 watt solar panel) to get fully charged.

How long to charge 200ah lead-acid or lithium battery will depend on many factors.

To make things easy for you, I’ve made a battery charge time calculator for you. “Enter the battery specs and the solar panel size” to find out how long will it take to charge a 200ah battery

200ah Battery charge time calculator

Solar Panel Size
Watts
Battery Capacity (Ah)
Ah
Battery Volts (V)
Volts
Battery Type
Battery Depth of Discharge (DoD)
%
Charge Controller Type

Note! Click here to read my post on what solar panel to charge 200ah battery, if you want to find out what size solar panel you need to charge your 200ah battery in desired peak sun hours.

The battery charging time will be according to peak sun hours. if you’re not sure “What are peak sun hours?” click here to read the post in which I’ve explained it in detail. In short,

  • 1 peak sun hour is equal to when the intensity of the sunlight is 1000 watts per meter square (1kw/m2)
  • use this calculator to find out how many peak sun hours your location receives

What is Battery depth of discharge or DoD? is the percentage of the total capacity of a battery is been discharged

Watch this video to understand the basics of electricity, amps, volts, watts, etc…

How long to charge 200ah lithium battery?

let’s say you have a 12v 200ah lithium battery with 100% depth of discharge, and 500 watt of solar panel system with an MPPT charge controller

How long to charge 200ah lithium battery?
How long to charge 200ah lithium battery?

12v 200ah lithium battery will take about 6 peak sun hours to get fully charged from 100% depth of discharge with 500 watts of solar panel system.

Full article: Charging 200Ah Lithium Battery Complete Guide

200ah battery charge time with solar panels (calculate in 6 steps)

Here are simple steps to calculate the 200ah battery charge time with solar panel

1- Convert 200ah battery capacity in watt-hours. To make this conversion we use this formula

Battery capacity in watt-hours = Battery Ah * Battery volts

Let’s say you have a 12v 200ah battery.

200ah battery in watts: 200 * 12 = 2400 watt-hours

2- Multiply the battery capacity in watt-hours by the battery depth of discharge. Let’s say you have a lead-acid battery that can be only discharged 50% to maintain its overall health

2400 * 50% = 1200 watt-hours

3- Multiply the battery capacity after DoD by 1.15 for a lead-acid type battery or by 1.02 for a lithium (LiFePO4) battery type. (lead-acid battery charge efficiency rate is 85%, and lithium type battery: 98%)

Total energy required to charge 200ah battery: 1200 * 1.15 = 1380 watt-hours

4- Multiply the solar panel wattage by 0.8 to take into account the environmental factors. Let’s say you’re using a 400 watt of solar panel system

Solar panel output: 400 * 0.8 = 320 watts 

5- Multiply the solar panel output after losses by 0.8 if you’re using a PWM charge controller or by 0.98 if you’re using an MPPT charge controller. Let’s say you’re using an MPPT charge controller

Solar panel output after charge controller: 320 * 0.98 = 313 watts 

6- Divide the “Total Energy Required To Charge The 200ah Battery” by the “Solar Panel Output After Charge Controller”

1380 / 313 = 4.4 peak sun hours

Related Post: How Long To Charge 12v Battery With Solar Panel?

How long to Charge 200ah battery with Charger?

Simply divide the Total energy required for a 200ah battery (which we have calculated above) by the total wattage of a charger.

If the charger’s power is mentioned in amps, here are the two steps which you can do.

  1. Convert the charger output power in watts by multiplying the amps by the voltage mentioned on the charger.
  2. Or skip the first part from the calculation above, and follow the 2nd and 3rd steps using a 200ah.

For example

200ah battery * Battery DoD (50%) = 100Ah 
100ah * Battery charging efficiency rate (1.15) = 115Ah

let’s say you’re using a 10amp charger to charge the battery

115 / 10 = 11.5 hours

Here is how long it takes to charge a 200ah lead-acid battery with a different amp charger:

  • 2 Amp charger: 60 hours
  • 4 Amp charger: 30 hours
  • 10 Amp charger: 12 hours
  • 20 Amp charger: 6 hours
  • 40 Amp charger: 3 hours

How long to charge 200ah battery – Chart

Here are different charts on how long will it take to charge 12v, 24v, and 48v, 200ah lead-acid battery using different size solar panels and an MPPT charge controller

12v 200ah lead-acid battery

Solar Panel SizeHow long To Charge 12v 200ah Battery
100 watts17.5 peak sun hours
200 watts9 peak sun hours
300 watts5.5 peak sun hours
400 watts4.5 peak sun hours
500 watts3.5 peak sun hours
600 watts3 peak sun hours
700 watts2.5 peak sun hours
800 watts2.2 peak sun hours
900 watts2 peak sun hours
1000 watts1.7 peak sun hours
Table: How long to charge a 12v 200ah battery

Summary

  • 300 watt solar panel will take about 5.5 peak sun hours to fully charge a 12v 200ah lead-acid battery from 50% depth of discharge using an MPPT charge controller
  • 200 watt solar panel will take about 9 peak sun hours to fully charge a 12v 200ah lead-acid battery from 50% depth of discharge using an MPPT charge controller

24v 200ah lead-acid battery

Solar Panel SizeHow long To Charge 24v 200ah Battery
100 watts35 peak sun hours
200 watts17.5 peak sun hours
300 watts12 peak sun hours
400 watts9 peak sun hours
500 watts7 peak sun hours
600 watts6 peak sun hours
700 watts5 peak sun hours
800 watts4.5 peak sun hours
900 watts4 peak sun hours
1000 watts3.5 peak sun hours
Table: How long to charge a 12v 200ah battery

Summary

  • 24v 200ah lead-acid battery from 50% Depth of discharge will take anywhere between 35 (using 100w solar panel) to 3.5 peak sun hours (using 1000 watt solar panel) to get fully charged

48v 200ah lead-acid battery

Solar Panel SizeHow long To Charge 24v 200ah Battery
100 watts70 peak sun hours
200 watts35 peak sun hours
300 watts24 peak sun hours
400 watts18 peak sun hours
500 watts14 peak sun hours
600 watts12 peak sun hours
700 watts10 peak sun hours
800 watts9 peak sun hours
900 watts8 peak sun hours
1000 watts7 peak sun hours
Table: How long to charge a 12v 200ah battery

Summary

  • 48v 200ah lead-acid battery from 50% Depth of discharge will take anywhere between 70 (using 100w solar panel) to 7 peak sun hours (using 1000 watt solar panel) to get fully charged

Maximum charging current for 200ah battery?

in order to maintain the battery health they are recommended be to discharged and charged at a specific percentage of current.

Here’s a list of types of 200ah batteries with their recommended max charging rate

  • 200ah lead-acid, AGM, and gel batteries: 50A or 600 watts for 12v battery or 1200 watts for 24v battery
  • 200ah Lithium (LiFePO4) battery: 200A or 2400 watts for 12v battery or 4800 watts for 24v battery

Note: Read the product description to get an accurate value

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I'm an experienced Sales Consultant with a demonstrated history of working in the renewables and environment industry. Skilled in Photography, Customer Service, and Sales.

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