1. High energy density, lightweight design
Small size and light weight: The energy density of lithium batteries is 3-5 times that of lead-acid batteries. With the same capacity, they are smaller in size and lighter in weight, making them suitable for limited installation space of solar street lights (such as inside lamp posts).
Flexible layout: can be designed as modular or integrated with solar panels and controllers to simplify the installation process.
2. Long cycle life, reducing maintenance costs
High cycle times: The cycle life of lithium batteries can reach 2000-5000 times (lead-acid batteries only 300-500 times), supporting long-term use of solar street lights (5-10 years).
Low attenuation rate: It can maintain stable performance even after deep discharge (80-90%), reducing the need for frequent replacement, especially suitable for maintenance in remote areas.
3. Efficient charging and discharging, adapted to solar energy characteristics
High charging efficiency: Lithium batteries have a charging efficiency of over 95%, while lead-acid batteries only have 70-80%, which can fully utilize the short sunshine time during the day for fast charging.
Low self discharge rate: The monthly self discharge rate is less than 3%, and the electricity can still be maintained on long-term rainy days, ensuring the continuous operation of street lamps.
4. Wide temperature adaptability and strong environmental compatibility
Low temperature performance optimization: Some lithium batteries (such as lithium iron phosphate) can operate at -20 ℃~60 ℃, and are suitable for high-altitude regions with temperature control technology (such as heating film).
High temperature stability: Its high temperature resistance is superior to lead-acid batteries, reducing the risk of capacity degradation caused by high temperatures in summer.
5. Intelligent management to enhance system reliability
BMS battery management system: Real time monitoring of voltage, current, and temperature, achieving overcharge/overdischarge protection, balanced charging, and extending battery life.
Remote monitoring: Some lithium batteries support IoT functions, which can remotely diagnose faults and reduce maintenance difficulties.
6. Environmental Protection and Safety
Green and environmentally friendly: does not contain heavy metals such as lead and cadmium, complies with RoHS standards, and is easy to recycle after disposal.
High safety: Lithium iron phosphate batteries have strong thermal stability and have passed safety tests such as needle puncture and overcharging to avoid leakage and explosion risks.
7. Economic advantage (full lifecycle cost)
The initial cost is high, but it is better in the long run: although lithium batteries have a higher unit price than lead-acid batteries, their long lifespan and low maintenance costs reduce the total lifecycle cost by 30-50%.
8. Modularity and compatibility
Flexible expansion: Supports parallel expansion of multiple batteries to meet the needs of different power street lights (such as high brightness LED or intelligent sensing street lights).
Strong compatibility: compatible with mainstream solar controllers (PWM or MPPT), simplifying system design.
