Can any machine work without its powerhouse? A solar battery is just as important as your phone battery. If you install a solar system without a strong solar energy storage battery, you’ll struggle to keep power when you need it most.
That’s why choosing the right battery for solar energy is key, especially if you live off-grid. A good battery stores extra energy for later use, so you don’t waste what your system generates. The real question isn’t whether you need a solar battery, it’s which one is best for your system.
With so many solar batteries on the market, picking the right one can be confusing. This article will help you understand the different options and how to choose the best one for your needs.
Types of solar battery
Before we go further, let’s look at the different types of solar batteries used in a solar energy storage system. Understanding these options will help you choose the best solar battery for your needs.
1. Flooded lead-acid battery
This is one of the most commonly used solar batteries, especially for off-grid systems. It offers several benefits:
- Has a lower upfront cost
- Very safe to use
- Highly reliable
However, there are also some drawbacks:
- It is large and takes up a lot of space
- Flooded lead-acid batteries are corrosive, so they need proper ventilation to prevent rust
- They require frequent maintenance and must be stored upright to avoid spillage
If you don’t mind the regular upkeep, this can be a great battery for solar energy storage. Now, let’s take a look at AGM batteries.
2. Absorbent glass mat (AGM)
This type of solar battery, also called a sealed lead-acid battery, is a variation of lead-acid batteries where the electrolyte is absorbed into a glass mat.
Benefits of AGM Batteries:
- Lower internal resistance compared to flooded lead-acid batteries
- Better temperature adaptability
- Faster discharge rate than some other battery types
- Holds a static charge for a long time
- Lightweight, making it a great choice for a solar energy storage system
- Doesn’t heat up easily
- Safe and non-hazardous
The only major drawback is that AGM batteries come at a higher cost.
3. Gel battery
Gel batteries have a unique design that sets them apart from other solar batteries. Their electrolytes are thickened with fumed silica, making them more durable and resistant to leaks.
Advantages of Gel Batteries:
- Require little to no maintenance
- Highly durable and long-lasting
- Excellent life cycle performance
- Shock-resistant, making them reliable for solar energy storage
- Narrow charging profiles, meaning they are less likely to get damaged from overcharging
Disadvantages of Gel Batteries:
- Their amp-hour capacity is lower compared to other batteries used for solar energy
- They tend to be more expensive than some other battery options
Despite the cost, their durability and reliability make them a solid choice for solar energy storage.
4. Lithium-ion battery
When looking for the best battery for solar energy, lithium-ion stands out as one of the top choices.
Advantages of Lithium-Ion Batteries:
- Lightweight with excellent capacity and long life cycle
- Highly efficient, making them ideal for solar energy storage
- Very stable and safe to use
- Require little to no maintenance compared to other solar batteries
Due to their efficiency and durability, lithium-ion batteries are a preferred option for many solar storage battery systems.
How long should a solar storage battery last?
The lifespan of a solar storage battery depends on its type, usage, and maintenance. On average:
- Lead-acid batteries last 3 to 5 years
- AGM batteries last 4 to 7 years
- Gel batteries last 5 to 10 years
- Lithium-ion batteries last 10 to 15 years
Factors like depth of discharge (DoD), charge cycles, and temperature also affect how long a battery for solar energy lasts. Proper maintenance and using a solar battery charger that prevents overcharging or deep discharging can extend its lifespan.
Other things to consider while choosing a solar battery
Now that you know the different types of solar batteries, you shouldn’t just walk into the market and ask for a lithium-ion battery. Without the right knowledge, you might end up overpaying or getting a battery that doesn’t suit your solar energy storage needs. There are other important factors to consider before making a purchase.
i. Battery capacity
One important factor to consider when choosing a battery for solar energy is its capacity. This refers to how much energy the solar battery can store. You should also think about the physical size of the battery and whether it fits your available space. Battery capacity is usually measured in amp-hours (Ah).
A solar battery with low capacity but a high power rating can run your home, but only for a short time. On the other hand, a battery with high capacity but a low power rating will power your appliances for a longer period, but not all at once. To get the best performance, it’s ideal to choose a solar energy storage battery that offers both high capacity and a high power rating.CHARGING TIME
Gel batteries charge really fast. Lithium batteries can also take about 3 hours to charge, but then flood acid can take up to a whole day to charge. So the faster the battery can charge the better for you. If you are thinking of the one that won’t take much time to charge, you should go for lithium-ion batteries.
ii. Ease of installation
When choosing a battery for solar energy, you should consider how easy it is to install. If you have never handled a solar panel system before, it’s best to seek help from a professional solar installer. Proper installation ensures that your solar battery works efficiently and lasts longer.
If you prefer a solar energy storage option that is space-friendly, requires little to no maintenance, and is easy to install, then lithium-ion batteries are a great choice. They are compact, efficient, and perfect for those looking for a hassle-free solar battery solution.
iii. Your budget
When it comes to solar energy storage, you get what you pay for. Highly efficient solar batteries tend to be more expensive, but they offer better performance and longevity.
For example, lithium-ion batteries cost more than other types of batteries used for solar energy, but they require little to no maintenance. This makes them a reliable and long-term investment for anyone looking for an efficient solar battery solution.
iv. Battery lifespan
Another key factor to consider is how long a solar battery lasts. Every solar battery has a lifespan, and over time, its efficiency will decline. The ability of a battery for solar energy to hold a charge reduces as it ages.
To ensure you get a solar battery with a long lifespan, check the warranty period. Batteries with longer warranties generally offer better durability, but they may also come at a higher cost. Investing in a high-quality solar energy storage solution can save you from frequent replacements and maintenance.
v. Manufacturer’s warranty
Another crucial factor to consider is the warranty of the solar battery. You don’t want to invest in a battery for solar energy only to realize after a few years that it has lost efficiency, and worse, that the warranty no longer covers it.
Spending wisely on a solar battery is essential. Generally, the more reputable the brand and the higher the cost, the better the warranty. A solar energy storage solution with a 10-year warranty is good, 20 years is even better, but a lifetime warranty offers the best peace of mind.
Now you know more about solar batteries, what next?
You have been provided with detailed information about solar batteries, so there’s no reason to make the wrong choice when you visit the market. If you still feel unsure, consider reaching out to a professional solar installer for guidance. Always do proper research before making a purchase, and ensure you work with a professional to get the best results.
If you’re in Nigeria, at Naihcotech, we are happy to be of assistance. Remember, a solar energy storage system is essential, so always choose the best option available.
NAIHCOTECH is open for advertisement and promotion of quality solar battery products. Contact us for any questions about solar energy storage, solar battery chargers, or solar power system installation. We are your go-to experts for solar installation, maintenance, third-party solar system setup, and other solar services.