The comparison between lithium batteries and lead-acid batteries

Lithium-ion battery

Lithium-ion battery refers to a type of battery made of lithium metal or lithium alloy as positive/negative material and using a non-aqueous electrolyte solution.

Most lithium batteries used for home energy storage generally use lithium iron phosphate cells due to the lower cost and long cycle life and with the development of science and technology, lithium battery has become the mainstream.

Advantages of lithium battery

1.High energy density-up to 460-600Wh/kg, High energy storage
2.Long service life-The service life can reach more than 6 years, cycle account up to 10000 times
3.Lightweight-9Kg for kWh
4.High rated voltage -3.7V or 3.2V for a single unit. The voltage can be adjusted to 3.0V for small electrical appliances
5.Low self-discharge rate- less than 1%
6.High power bearing capacity-reaching 15-30C charge and discharge capacity
7.Good adaptability to high and low temperature- in -20℃--60℃ environment
8.Environmentally-producing, using, and scrapping, not contain or produce any lead, mercury, cadmium, and other toxic and harmful heavy metal elements and substances


AC coupled inverter with Pylon battery in South Africa

AC coupled inverter with Pylon battery in South Africa

AC coupled inverter with Pylon batteries in the UK

AC coupled inverter with Pylon batteries in the UK

Lead-acid battery

A lead-acid battery is a type of battery whose electrodes are mainly made of lead and its oxides, and whose electrolyte is a solution of sulfuric acid.

In the discharge state of the lead-acid battery, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead. In the charging state, the main components of positive and negative electrodes are lead sulfate.

Lead-acid battery technology has been around for over 100 years that has been used in off-grid energy systems for decades. Lead-acid batteries are the most widely used and have the largest market share among chemical batteries, the main market is a stable and assured civil market, especially in large-scale energy storage applications. For larger capacity and off-grid applications lead-acid deep cycle batteries would be much more competitive.

Advantages of lead-acid battery

1. Cheap-Lead-acid batteries are the cheapest secondary batteries.
2. Proven technique-the longest time to realize industrial production, the most mature technology, stable and reliable performance, and good applicability
3. Good safety-no flammability, normal or low-pressure design. All lead-acid batteries are UL certified.
4. Easy recycling and reuse-Lead-acid batteries have simple composition and high recycling value, which is the easiest battery to realize recycling and recycling.
5. Stable operating voltage-The electromotive force is stable during discharge.

6. Compatibility-It can be compatible with various electronic consumables.


Lithium-ion battery VS Lead-acid battery

The following table is a general comparison of lithium-ion batteries and lead-acid batteries. It is for reference only. When making a choice, it should depend on the actual situation.

Comparison Lithium-ion batteries Lead-acid batteries
Market price expensive cheap
Volume small big
Weight 9Kg for kWh 30Kg for kWh(3 times then lithium battery)
Cruising ability long battery life short battery life
Cycle life Cycle life in 800-10000 times, long service life, and cost performance is 3-6 times of lead-acid battery The cycle life is below 500, and the service life is short, low-cost performance, 10-15years
Charge&discharge efficiency up to 97% up to 80%
Safety low security high security
Compatibility good compatibility better compatibility
Charging&maintenance maintenance of complex, high cost maintenance of simple, low cost
Sustainability&environmental impact non-pollution  lead, heavy pollution


For luxpower inverter hybrid low voltage, the nominal voltage is 48V, and the battery voltage range40-60V. If you want to know more, please refer to Hybrid-LV-48V. While for hybrid high voltage, the nominal voltage is 250V, and the battery voltage range 90-450V. If you want to know more, please refer to Hybrid-HB-250V.

For off-grid inverter, the nominal voltage is 51.2V or 48V, and the max voltage is 59V. If you want to know more, please refer to Off-grid inverter.

For AC coupled inverter, the nominal voltage is 48V and the max voltage is less than or equal to 60V. If you want to know the detail, please refer to AC-ESS.

To know more about choosing batteries, go to the article Battery storage options for luxpower inverter.


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Post time: Jan-26-2021
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