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Why Lithium Solar Batteries are the Best Type of Batteries for the Solar Panels?


Why Lithium Solar Batteries are the Best Type of Batteries for the Solar Panels?

Homeowners always want to find the best solar panels for the solar home system. But actually, the solar battery is the most important part of the solar home system. What is a solar battery? Solar batteries are used to store electrical energy for later use. Electricity will be generated by the solar panel and then stored in the solar batteries. You can keep appliances running during a power outage or just use more solar energy to save money on electricity. In this case, the output capacity ability and the cycles of the batteries is a very important factors to evaluate a battery.

Let’s jump to see why LifePO4 batteries are the most suitable batteries for solar homes.


What is the solar home system?

Most solar homes generate electricity from the sun by installing photovoltaic panels on their roofs or by mounting a ground-mounted solar system. PV arrays attached to solar panels are often equipped with solar batteries which store the energy produced by the panels. The use of solar power can sometimes mean that your property produces enough power and stores it efficiently to completely eliminate your dependence on the grid, or it can enable you to go totally off-grid. This is why many homeowners associate the term "solar home" with any household powered entirely by solar energy, although it can also refer to grid-connected or hybrid systems.



Why is the battery bank the most important part of the solar home system?

Solar panels are often misunderstood as being the most important part of a solar system. The battery bank is the real culprit. To keep their standard lead-acid battery charged, many consumers jump into the world of solar with several solar panels. A battery bank, however, is a better investment in the long run. Having many solar panels won't make a difference if your battery bank isn't adequate. In order to charge the battery bank, solar panels harness the sun's energy. You won't be able to generate power when the sun goes down or when it's cloudy. Your battery bank limits you as a result. You have more power available when you have a larger battery bank. An array of solar panels can speed up the charging process of your battery bank, but it does not increase the battery's capacity.


Benefits of Lithium Batteries.


The advantages of lithium iron phosphate batteries over lead-acid and other lithium batteries include improved discharge and charge efficiency, a longer life span, and the ability to deep cycle while maintaining power. Lithium-ion batteries are often more expensive than LiFePO4 batteries, but over the product's lifetime, they are much more cost-effective. The fact that they don't need maintenance and last so long makes them a smart investment.

What Factors Do You Need to Think About When You Are Looking for Lithium Solar Batteries?

Power rating

A battery's power rating refers to how much power it can provide at once. Power is measured in kilowatts (thousands of watts) or amperes (amps).

For example, a typical compact fluorescent lightbulb consumes 12 watts (or 0.012 kW) of power. In contrast, a 3-ton air conditioner consumes 20 amps, which is equal to 4.8 kW.

Right now, most batteries produce around 5 kW of continuous power. Solar batteries often have two power ratings-continuous and instantaneous. That way, they can provide more power in short bursts. This is important for appliances that require a lot of power to turn on but then run at a lower power level.

Battery size/usable storage capacity

A battery's capacity (or size) is the amount of electricity it can store and provide to your home. While power is expressed in kW, battery size is expressed in kilowatt-hours (kWh), which is power multiplied by time. So, a battery's storage capacity tells you how long it can power parts of your home. Make sure to look for the usable capacity of a battery, as that number represents the amount of stored electricity you can actually access.

Since electricity usage is power multiplied by time, if you're using more power, you'll use up stored electricity faster. But, if you're only using your battery to back up a few appliances with relatively small power consumption, it will last longer. This makes the size of a battery slightly misleading because the length of time a battery's charge will last is directly influenced by how much power it outputs.

Think about the example above of the difference between a light bulb and an AC unit. If you have a 5 kW, 10 kWh battery, you can only run your AC unit for two hours (4.8 kW * 2 hours = 9.6 kWh). However, that same battery would be able to keep 20 lightbulbs on for two full days (0.012 kW * 20 lightbulbs * 42 hours = 10 kWh).

Roundtrip efficiency

Roundtrip efficiency measures how well your energy storage system (battery + inverter) converts and stores electricity. Some energy is always lost when converting electricity from direct current (DC) to alternating current (AC), or when storing it in a battery. So, a solar battery's roundtrip efficiency tells you how many units of electricity you'll get out of a battery for every unit of electricity you put into it.

Battery lifetime: throughput and cycles

Battery lifetime is measured with three things: expected years of operation, expected throughput, and expected cycles. Throughput is how much electricity you'll be able to move through your battery over its lifetime. Cycles measure how many times you can charge and discharge a battery.

You can convert a battery's expected or warranted throughput into an expected lifespan by dividing the throughput (expressed in kWh) by the usable capacity of the battery. This will give you an estimate of how many full cycles you'll get from your battery. Then, divide that number of full cycles by the number of days in the year. For example, a 20,000 kWh throughput warranty on a 10 kWh battery means 2,000 expected cycles or a cycle per day for 5.5 years.

You can also convert a battery's expected or warranted number of cycles into an expected lifespan by dividing the number of cycles by the number of days per year. For example, a 4,000 cycle warranty equates to a cycle per day for 11 years.


All solar batteries have to meet safety requirements to be certified for installation in homes and businesses. Every battery on EnergySage meets these requirements. Some battery chemistries have been tested for safety more than others. But, all batteries installed in the US are safe!


A battery's chemistry is the primary compound used to store electricity inside the battery. This is the most important characteristic to compare because it determines the battery's other characteristics. For example, different lithium-ion chemistries may store more electricity in a smaller space or may last longer. And these are just the differences within lithium-ion chemistries. There are also differences between lithium-ion batteries and lead-acid batteries, vanadium flow batteries, or other experimental battery chemistries. Different solar battery chemistries usually cost different amounts of money.

In conclusion, compared to other lead-acid batteries, lithium batteries have greater advantages and are more suitable for solar home solar energy storage applications.