Residential energy storage systems are becoming popular with residential solar customers today. According to a survey of more than 1,500 U S. households, about 40 percent of Americans are concerned about frequent power outages. Of those surveyed who already have solar power installations, 70 percent said they plan to install battery storage systems. However, it has been shown that a variety of factors can affect the life of a residential battery storage system.

In addition to providing backup power in the event of a power outage, many battery storage systems allow for intelligent scheduling of power input and output, which is designed to maximize the value of residential solar power systems. Moreover, some battery storage systems are optimized for integration into electric vehicle charging facilities.

Although the installed capacity for deploying energy storage systems is steadily climbing, their deployment rate remains low. 8.1% of residential solar systems in the U.S. will be deployed with battery storage systems in 2020.

Battery Life:

Batteries typically last between 5 and 15 years. This means that battery storage systems will likely need to be replaced over the 20 to 30 years life cycle of a solar power facility. Battery life is mainly determined by the usage cycle. Reaching the 60% or 70% capacity threshold within a certain charge cycle is guaranteed.

There are two usage scenarios that lead to battery degradation:

overcharging and trickle charging. Overcharging is the act of pumping current into and fully charging a battery. Doing so can cause the battery to overheat and possibly even catch fire.

Trickle charge refers to the process of continuously charging the battery to 100%，during which the battery capacity will inevitably be lost, and this process will increase the internal temperature, which will reduce capacity and life.

Another cause of degradation over time, is the loss of lithium ions from the electrolyte in the battery. The side effects in the battery trap the available free lithium, which gradually reduces capacity. While low temperatures can stop lithium-ion batteries from working, they don't actually degrade them or shorten their effective life. The Faraday Institute says the overall life of

the battery will be reduced at high temperatures. This is because the electrolyte between the electrodes breaks down at high temperatures, causing the battery to lose its ability to flow lithium ions. This reduces the amount of lithium ions that the electrodes can accept into their structure, depleting the lithium-ion battery capacity.

Maintenance Matters:

It is recommended that home users install the battery in a cool and dry location, preferably a garage, where the effects of a fire can be minimized. The battery and its surrounding components should have proper inter for cooling and regular maintenance checks will help ensure optimal operation.

Avoid repeated deep discharges of batteries whenever possible, as the more you discharge, the shorter the life span. If the residential battery storage system is heavily discharged every day, it will be time to increase the battery bank.

Batteries should be connected in series to maintain the same charge level. Although the battery pack may show a total charge level of 24V~48V, there may be different voltages between the batteries, which is not good for protecting the long-term operation of the battery energy storage system. In addition, it is recommended that the correct voltage set point be set for the charger and charge controller, as determined by the battery manufacturer.

O&M personnel should perform frequent inspections. Things to check include leakage (buildup on the outside of the battery) and consistency of voltage.

If you have any requirements or any kind of query regarding the Energy storage solutions for your desired applications, feel free to communicate with our dedicated team at any time at marketing@everexceed.com.