Lithium batteries are convenient because of their build chemistry. They are affordable, reliable, and don’t require much maintenance like any other acid batteries. So they are one of the great substitutes for any solar panel chargers.
Though once thought to be heavy and bulky, more and more people going for a 200-ah lithium battery for their chargers. Which gives the option of having one rather than a few laying around. So how long does it take to charge 200ah lithium battery?
It depends on how many watts of solar panel you have and at what stage your battery charge is. Normally it takes 5 hours for a 200ah lithium battery to fully charge, with a pair of 300-watt solar panels. A bit confusing right?
We are going to walk you through the equation and mathematics so you can do it on your own every time.
Calculation Method Of How Long It Takes To Charge A 200ah Lithium Battery
As far as solar panels go, you have to keep in mind they are not as efficient as electricity. So whatever wattage you are getting out of the box, you will get a little less while charging.
So the more panels and higher rating they are, your 200ah lithium battery will charge even faster. We take you to have a 12V 200ah battery. And we will proceed from there with the math.
The equation is:
Battery Amp Hour x Battery Volts = Required Solar Panel Wattage
So for a 12 V battery with 200ah
12 x 200 = 2400
You will need your solar panels to be able to produce 2400 watts to charge your 200ah battery. As there are only 5 hours of direct sunlight during the day, and solar panels are not as efficient as they are required to be, going over 2400 watts is the best thing to do. Keep in mind, that 2400 watts are required in an hour.
So we suggest you go for two 300-watt array solar panels, which will take 5 hours or less if there is direct sunlight to charge your 200ah battery. You can add more panels if you want, which will cut down the time. And if your battery is half full, the time will also take less to charge.
The Things Can Effect Battery Charging Time
There are a few things that affect your battery charging time. Here are a few of them.
1. Sunlight And Weather
Although you have the perfect panels and system, without proper sunlight, your 200ah battery won’t charge efficiently. And weather conditions like rain, cloud, fog, and snow will affect it. It’s not your solar panels at fault, but nature.
2. Solar Panel Efficiency
No matter how powerful a solar panel is, a higher wattage number is not efficient. What is efficient is how the percentage of it is working and getting converted. So going for a better efficient solar panel or more solar panels is always a plus.
3. Battery Discharge Rate
Different batteries have different discharge rates. And when they discharge to a certain level, they start to recharge. Check your lithium battery for its discharge and recharge value. This will tell you how long it will take to charge.
Frequently Asked Questions and Answers (FAQs)
How much solar do I need to charge a 200Ah lithium battery?
You need at least 600 watts of solar panel to charge a 200ah lithium battery.
How long will a 400w solar panel take to charge a 200Ah battery?
Depending on your battery’s charge status, and weather conditions, it will take from 5-8 hours for a 400w solar panel to charge a 200ah battery.
How many amps does it take to charge a 200Ah lithium battery?
A 10 amp battery can charge a 200ah lithium battery in 20 hours. The better amp the faster it will charge the battery.
Batteries are good as chargers and other equipment. The better setup you have for your solar panel, the better your batteries will charge. No matter if it is a 100ah or a 200ah. Make sure you get the right solar panel with maximum efficiency. And you will be good.