12v 30Ah， 50Ah， 80Ah，
24v 60Ah solar street light project
It is very important for the batteries in the entire solar street light system. During the day, it stores the energy generated by solar panels and then discharges it to supply energy to the solar street lamp when the light is insufficient or at night. Its quality and price directly determine the quality and price of the entire solar street light system. Therefore, the choice of battery is very important for different schemes or different types of solar street light systems.
Our system is provided with battery storage backup sufficient to operate the light for 10-11 hours daily. The system is provided with automatic ON/OFF. time switch for dusk to dawn operation and overcharge / deep discharge prevention cut-off with LED indicators. Solar street light batteries usually work with MPPT/Charge Controller. 12v and 24V batteries are more widely used.
Lead-acid battery (VRLA) is a kind of battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. It is also called AGM Battery.
Advantages: The voltage is relatively stable. Under the premise of the same capacity, its price is the cheapest among the four types of batteries;
Disadvantages: The specific energy is relatively low, so the volume is much larger than ordinary batteries. The service life of lead-acid batteries is relatively short, generally, 300-500 deep cycles. And maintenance is more frequent. But because of the price advantage, it is still widely used in the solar street light industry.
GEL batteries belong to a development classification of lead-acid batteries. It is equivalent to an upgraded version of lead-acid batteries. It is maintenance-free and solves the criticism of frequent maintenance of lead-acid batteries.
Advantages: The storage capacity, discharge capacity, and life are improved, which can reach 500-800 deep cycles. At the same time, the GEL battery can be used in the temperature range of -40℃-65℃, It can be used safely under various high and low-temperature conditions. Good seismic performance, suitable for long-distance transportation.
Disadvantages: The price is much higher than that of AGM batteries, sometimes even surpassing the price of lithium-ion batteries.
Refers to a lithium battery using lithium nickel cobalt manganate (Li (NiCoMn) O2) or lithium nickel cobalt aluminate as the positive electrode material. The nominal voltage of a single ternary lithium battery is 3.7V.
Advantages: high specific energy, fast charging. Its deep cycle times are about 800-1000 times, life is similar to gel battery, working temperature is -30 to 55 Celsius, low-temperature resistance performance is very good, very suitable for use in low-temperature areas. Its size is very small.
Disadvantages: Poor high-temperature resistance. Its internal structure is not stable. If it is a ternary lithium-ion battery produced by an unqualified manufacturer, it may explode during the overcharging process, or in a higher temperature environment.
Lithium iron phosphate battery is a kind of lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. The rated voltage of the single unit is 3.2V, and the charge cut-off voltage is 3.6V~3.65V. For small power and strict price requirements, 3.2V battery packs are generally used. The 12.8V battery packs are mainly used for high-quality street lights, it is long-lasting solar batteries.
Advantages: low self-discharge rate, high energy density without memory effect, small size, fast charging, and long life. Its deep cycle charging times are generally 1500-2000 times. A set of lithium iron phosphate batteries is generally in normal use. It can be used for 8-10 years. High-temperature resistance can be used in an environment of -40℃-70℃, and the temperature range of use is relatively wide.
It has good stability and relatively stable electrochemical performance, which determines that it has a stable charging and discharging platform. Therefore, the structure of the battery will not change during the charging and discharging process, and it will not burn and explode. It is still very safe under special conditions such as extrusion and acupuncture.
Disadvantages: Under the premise of the same capacity, its price is the highest among the above 4 batteries.
|Battery Voltage||Battery Capacity||Total Energy|
|Other model customizeable, battery also can be put in parallel for high capacity|
High Cycle Life：>2000 times and 80% DOD for effectively lower cost of ownership, because they live longer (3x – 5x longer)than traditional golf cart batteries.
Built-in BMS Protection： Battery Management Systems are incorporated to protect the battery from overcharging, over-discharging, and short circuits.
Light Weight: Dry power lithium batteries have a higher energy density. Lithium-ion batteries (72 lbs) weigh 1/4 the weight of Lead-Acid batteries (325 lbs).
Wide Operating Temperature Range: Suitable for users in a wider range of applications where ambient temperature is unusually high: up to +60°C
Fast Charging Speed: Recharge speeds of lithium-ion batteries are significantly faster than lead-acid (80% charge can be achieved in as little as 1-hour, full charge in 2-3 hours, vs. 8-10hrs for traditional Lead-Acid batteries)
Require No maintenance: no adding water, cleaning corrosion, or checking acid levels.
Do not lose power as voltage dips (lead-acid batteries get ‘tired’ as they are used)