A solar battery is an essential part of a household solar energy system. You can store the energy for later use by having it, which is an important consideration to remember. That way, you can run some appliances in case of a power outage, which will save you money on electricity bills.
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Another name for them is deep cycle batteries because they can discharge and charge significant electricity levels compared with other storage options. Using an energy storage system comes with numerous advantages, including emergency backup, financial savings, and many more.
Still, they are highly complex, especially if you do not know anything about them. Therefore, you should consider a few things before choosing a solar battery for household requirements.
Let us start from the beginning.
Things to Consider When Choosing a Solar Battery
We can differentiate numerous factors, comparison points, and criteria important for evaluating the best energy storage option you can find on the market.
The most common aspects are:
- Some people want to power up their entire households in case of an outage. We recommend you choose a battery with a rating.
- When using energy-intensive appliances, you should choose the one with an instantaneous power rating.
- Of course, if you wish to run your home for an extended period by using a solar storage, you should check out high usable capacity.
- Another important feature of solar power battery storage is high roundtrip efficiency because you will get the most out of kilowatt-hour of electricity within it.
- For getting the most significant storage without using too much space, we recommend you to get lithium-ion and nickel manganese cobalt options.
- On the other hand, you should get LEP or lithium-ion phosphate if you wish to get the one with the most extended lifetime. At the same time, they come with the most significant safety ratings, which makes them the safest option you can find on the market.
- Power Rating
When it comes to power rating, you should know that it depends on kW or kilowatts of power a battery can provide you.
Therefore, a power rating will tell you how many appliances you can run simultaneously with a single charge, vital for determining the best course of action.
It comes in the form of kilowatts or amps, depending on the appliances you are using. For instance, a lightbulb uses twelve watts of power, while an AC unit will use twenty amps, which is 4.8 kilowatts.
Therefore, the standard is at least five kilowatts and more. Generally, solar batteries come with two different power ratings, which means they can offer you short bursts of power or instantaneous power rating.
This is highly important for intensive appliances such as a sump pump because it requires a large amount of power to turn it on, but you do not need the same amount for running it along the way.
- Usable Storage Capacity/Battery Size
A capacity and size state the amount of electricity it can store at once and supply your household. Even though power comes in kilowatts, size comes in kilowatt-hours instead.
That way, you can determine how long it will handle your household with the endless number of kilowatts. It is vital to compare different options, and you should check out the max amount of electricity a single battery can hold at once.
Since you should multiply electricity use by time, when you are using more power, the battery will last shorter. At the same time, if you are using it for a few necessary appliances with small power consumption, you can use them for more extended periods.
That is why size can mislead a buyer because the length of the battery charge will depend on the amount of electricity you use.
- Number of Batteries You Need for Entire Household
Everything depends on your energy storage system and the things you are using, determining the type you should get. Therefore, you should evaluate the characteristics of your appliances first.
At the same time, by answering questions such as: how long you wish to use them; what type of panels you have; appliances you need to use, and many more.
As you can see, the number depends on the size of your household, number, and type of appliances.
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- Roundtrip Efficiency
Another critical consideration is roundtrip efficiency, which will show you the amount of electricity your battery can convert and store. Remember that losses are expected when it comes to keeping electricity.
It means you will lose a particular number of kilowatt-hours of electricity during an inverting process from direct current (DC) to AC or alternating current.
Therefore, a solar roundtrip efficiency will show you how much power will get out of the battery compared with the number that got inside in the first place.
- Lifecycle
When it comes to lifecycle, you should know it depends on three factors: regular cycles, expected throughput, and years of operation.
It is vital to remember that regular cycles and throughput are similar to car mileage warranty deals. Therefore, a throughput will allow you to compare the amount of electricity you can use and move with the battery during its lifecycle.
On the other hand, cycles will measure how many times you can discharge and charge it along the way. If you wish to convert warranted or expected throughput into a lifespan, you should divide throughput in kilowatts by the battery’s usable capacity. That way, you can determine the number of cycles you will get from it. Then you should divide the number of processes by the number of days within a single year.