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Demand for Solar Battery
As remote, off grid systems with large PV arrays become more common, demand for solar battery banks is growing. Designing and installing a bank of solar batteries is more than simply adding rows of batteries to increase capacity. Solar battery banks require proper battery selection and a careful analysis of the available products and trade-offs to build a high-performance system with a long life.
Function of Solar Battery
The primary function of the solar power battery bank is to store energy. A battery bank is a group of cells specially arranged in serial and/or parallel to achieve maximum storage capacity and store sufficient energy to support your electrical needs. The performance of an off-grid system depends on how efficiently the bank stores power and supports the load. The bank would also allow for sufficient energy to be stored for when the sun’s rays are overshadowed by clouds. There are four basic battery types that are available to meet the needs for your solar power battery bank. Those types of solar batteries include the lead acid battery, flooded lead acid battery, sealed absorbent glass battery and gel-cell battery.
Typical solar battery banks limit regular discharge to 20% and the overall discharge to 50% for good battery life. The daily depth of discharge (DOD) should be calculated using only the loads that occur during non generating hours, while the total daily load should be used when calculating the DOD for extended periods of such use. With a system that includes a large PV array, it may be difficult to justify the inclusion of a very large battery bank to handle extended periods of load shedding. Optimizing PV array could mean that smaller solar battery banks may work better and reduce initial investment.
SMF VRLA Solar Batteries
Sealed Maintenance Free (SMF) Valve Regulated Lead Acid (VRLA) solar batteries are either of AGM or Gel construction. In addition, battery construction specifics vary from manufacturer to manufacturer. Sealed solar batteries offer many advantages, but several other factors should also be considered.
These solar batteries are less hazardous to transport and install with no potential for spilled electrolyte during installation. Although they are more sensitive to improper charging or discharging cycles, unless they are overcharged they are not likely to release any gasses. No maintenance is an advantage since there is no water to add and a significant reduction in terminal corrosion. This also reduces the risk of damage from poor maintenance or adding poor-quality water, since the electrolyte does not stratify over the life of the batteries. They can also be mounted horizontally thus reducing space requirements on site.
High Capacity Solar Batteries for Power Storage
The increased availability of high-capacity 2 V sealed batteries makes them a viable option for large battery banks. A lot of commonly available high-capacity solar battery models provide many of options to reduce or eliminate the need for multiple series strings. Although the initial outlay may be higher, these solar batteries are generally more cost effective over a system’s lifetime. These solar battery banks achieve long operational lives for high-performance off-grid solar energy products and solar solutions that meet system demands.