Lithium batteries are popular for solar energy storage due to their numerous advantages over traditional tubular lead-acid batteries. The tubular batteries have a cycle life of 400-600 cycles when charged properly, and battery topping is done in time, which is a very tough task to maintain. Tubular batteries don’t last more than three years in Solar Hybrid systems or on Solar PCUs.
Here are some of the key benefits of using lithium ion batteries for solar systems:
More Solar panels can be installed: the Tubular batteries can be charged by 10% of their total capacity, which is the major challenge if we are installing a 24Volt Lithium PCU with 150 Ah Tubular Lead Acid baterries then 15 Amp is the maximum limit which means one can install 360 Watt panels which is a very small wattage. In the case of a Lithium-ion battery 24Volt 80 Ah, one can install 960-watt panels, which makes the Lithium battery best suitable for the Solar hybrid PCU. With 150 Ah 24 V lithium one can install 2,000 Watt Solar panels system which is 5 times of the similar size Tubular Lead acid battery system. https://www.solarreviews.com/blog/are-lithium-ion-the-best-solar-batteries-for-energy-storage
- High energy density: Lithium batteries can store significant energy in a relatively small and lightweight package. This makes them ideal for homeowners who want to maximize their solar energy storage capacity without taking up too much space. The Solar Tubular batteries come in a C10 rating, and the lithium batteries come in a C1 capacity.https://suvastika.com/benefits-of-lithium-battery-in-inverter-ups/
- Long lifespan: Lithium batteries have a much longer lifespan than tubular lead-acid batteries, typically lasting 10 to 20 years. This means you won’t have to replace your batteries as often; tubular Lead Acid batteries don’t last for more than three years.
- Deep discharge capability: Lithium batteries can be discharged much deeper than lead-acid batteries without damaging the battery. This means you can use more stored energy before the battery is recharged. The backup time of a Tubular Lead Acid battery is 150, and the backup time of a Lithium-ion battery of 80 Ah is more than that of the tubular battery.
- Efficient charging and discharging: Lithium batteries are very efficient at charging and discharging, meaning that you can store more of the solar energy generated by your panels and use it when needed. The lithium battery can be charged in 2 to 3 hours, and the tubular batteries take 10 to 15 hours to charge completely.
- No maintenance: Lithium batteries require no maintenance, unlike tubular lead-acid batteries, which must be watered regularly, checked for corrosion and cleaned regularly.
- Cost of Charging: Lithium batteries are continuously charged even after 100%. They need a trickle charge as once charged 100%, the tubular battery does not need any tickle charging, which saves charging costs.
In addition to these benefits, lithium batteries are becoming more affordable, making them more attractive options for homeowners. As the cost of lithium batteries continues to decline, they are likely to become the standard for solar energy storage.
Here is a table summarizing the key differences between lithium batteries and lead-acid batteries for solar energy storage:
|Feature||Lithium Battery||Lead-Acid Battery|
|Lifespan||10-20 years||3-5 years|
|Depth of discharge||80-100%||50-60%|
|Charging and discharging efficiency||C1 capacity||C10 capacity|
Lithium batteries are a superior choice for solar energy storage due to their long lifespan, high energy density, deep discharge capability, efficient charging and discharging, and low maintenance requirements. As the cost of lithium batteries continues to decline, they are likely to become the standard for solar energy storage.