Difference between solar lithium ion battery and solar lead acid battery

With the continuous development of green solar energy industry, off grid solar power system become more and more popular, and battery storage plays an important role in the whole off grid solar power system.Solar lithium ion battery and solar lead acid battery are the most common battery options.

Next let me explain what is the difference between lithium ion and lead acid battery and how to choose the battery for the solar power system.

1)Service life,cost and efficiency:
The service life is different. The service life of solar lead acid battery is generally about 2 years; Solar lithium ion battery has strong durability and its service life is generally 4-5 years.
Solar lead acid battery is a tried-and-true technology that costs less, but requires regular maintenance and doesn't last as long. Solar lithium ion battery is a premium battery technology with a longer lifespan and higher efficiency, but you'll pay more money for the boost in performance.Typically for solar lithium ion battery it's at least 95% efficient, whereas solar lead acid battery offer efficiency around 80-85%. 
This is the primary difference between lithium ion and lead acid battery.

2)Safety: 
Solar lead acid battery large current discharge is not easy to happen, because it has a high sealing, even if there is an accident (such as leakage), the positive and negative electrodes and lead acid electrolyte is not flammable. The electrolyte of solar lithium ion battery is ester solution, which is flammable and volatile. 
Different electrical characteristics solar lead acid battery can not discharge with high current, solar lithium ion battery can discharge high current.

3)Different energy densities: 
30WH/KG for solar lead acid battery, 110WH/KG for solar lithium ion battery; So same rated power batteries, solar lead acid battery will be heavy and big volume than solar lithium ion battery.
Generally, the weight of solar lead acid battery pack is 16-30 kg, and the volume is large; Solar lithium ion battery is generally 2.5-3kg, and its volume is relatively small.

4)Cycle life: 
Solar lead acid battery cycle life is about 8000-10000 times, and Lifepo4 battery cycle life can be 3000 times. Solar lithium ion battery has longer life span than solar lead acid battery.
The number of charge-discharge cycles is different. Solar lead acid battery is generally fully charged and discharged within 400 times, with memory;Solar lithium ion battery is fully charged and discharged for 500 times and has no memory.

5)Battery capacity:
The battery capacity is different. The capacity of solar lead acid battery is about 20 A; The solar lithium ion battery capacity is 8-10A.

6)Environmental protection:
Solar lead acid battery pollution in the production process, if not properly recycled may also cause pollution; solar lithium ion battery is relatively green.

After reading the difference between lithium ion battery and lead acid battery, we can choose a more suitable battery configuration for off grid solar system.
So what’s kind of battery used in the solar system depends on your actual requirement. If you choose solar lithium ion battery and focus on the high quality and long cycle life, you should accept the expensive cost. Also if the budget and cost is the points you focus, you can choose the solar lead acid battery.

As a manufacturer and supplier of solar energy products, Xindun Power has been developing in the solar energy industry for more than 17 years and can provide high-quality off grid solar system products, including solar lithium ion battery and solar lead acid battery. 
If you want to know more about the quotation or difference between lithium ion battery and lead acid battery, or if you want to inquire about off grid solar systems, please feel free to contact us.