Choosing the Right Battery for Your Solar System in 2023

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Unless you’ve been living under a rock, you probably already know that solar power is trending as a sustainable and “free” power source. Even if you already have your own solar setup that you’re already benefiting from, you may not have a reliable or efficient way to store solar-generated energy.

For consecutive cloudy days, short winter days and/or unpredictable weather, you’re going to need a promising method. The answer is; invest in a reliable battery – all will be settled.

Why You Need a Battery for Your Solar System

If your solar system is without a battery, excess solar power is simply wasted. It goes without saying; if the sun isn’t shining, you’re not going to be provided with enough power.

Using batteries to store any excess solar energy is a smart move. It allows you to use it at a later time, even if the sun isn’t out. In addition, you’ll reduce your dependency on the grid while simultaneously saving money on your utility bill. In fact, some batteries even support a connection to the grid, offering the freedom and benefit to earn money from your own solar system.

bluetti home battery backup system

3 Most Common Types of Batteries for Solar Systems

If you’re interested in learning more about which batteries are ideal, you’re likely going to be looking into three of the most common types. Let’s get right into it.

Lead-Acid Batteries

As one of the first types of batteries created with solar power in-mind, lead-acid batteries have been used for decades, making them one of the most affordable options. These batteries offer high surge currents and contain a relatively high energy density. However, they tend to have a much shorter lifespan than their counterparts and often require regular maintenance.

Nickel-Cadmium Batteries

Nickel-cadmium batteries are well-known for their ability to withstand extreme temperatures, making them one of the most durable options. Their long lifespan and high efficiency of charge/discharge make them a prime candidate for those who need long lasting reliability. Unfortunately, they are extremely expensive and are comprised of highly toxic materials.

Lithium-Ion Batteries

As one of the most common batteries used in electric cars, consumer electronics and rechargeable devices, lithium-ion batteries are a great choice. Typically, they’re much more lightweight, simple to maintain and offer a high amount of energy density. For solar energy storage, they’re usually comprised of two types; lithium nickel manganese cobalt oxide (NMC) or lithium iron phosphate (LFP). NMC batteries are relatively more lightweight and boast a higher energy density. LFP batteries, on the other hand, deliver almost five times as many charge cycles as NMC batteries and are much less prone to catching fire.

Why Choose a LiFePO4 Battery?

For the purpose of storing solar-generated energy, LiFePO4 batteries are widely preferred. Simply put, they’re much more stable, safer and offer up to 3,500 charge/discharge cycles. This makes them a smart long-term investment for those who have their own solar system.

Needless to say, there are several different batteries on the market. BLUETTI stands out as a leading brand that provides many options for portable, home and commercial battery solutions. In addition to the aformentioned benefits of LiFePO4 batteries, BLUETTI’s battery systems offer plenty of features to enjoy.

Self-Heating Function

Several BLUETTI offerings are equipped with built-in temperature sensors that automatically enable self-heating functions for freezing conditions. Take the B300S for example. As an additional battery for the AC500 power station, it adds much-needed capacity for certain scenarios. The B300S’ self-heating function ensures that the entire power system operates as smooth as possible, even in the dead of winter when temperatures can reach -20 degrees Celcius (-4 Fahrenheit).

bluetti b300s home battery

Integrated Power System

Many of BLUETTI’s battery solutions can offer complete power systems that integrated MPPT controllers, inverters, outlets and more. These batteries can also operate as an uninterruptible power supply with additional features such as peak load shifting and off/on grid connections. This makes them a prime choice for those needing truly uninterruptible power for a wide range of needs.

Highly Compatibility

Thankfully, BLUETTI battery systems are highly compatible with new or existing solar systems. Each one varies in size, power and capacity so you can acquire the correct option for your specific needs.

How to Choose the Right Battery System?

Choosing the correct battery for your specific scenario doesn’t have to be difficult. Let’s break it down into two main and most common purposes.

For Residential Solar Systems

Homes, farms and standard dwellings typically install their solar panels on the roof in large arrays that are often capable of generating more power than is needed. As a result, the requirement for a large storage capacity is typically needed. BLUETTI recommends the EP900 and AC500 battery system in these instances. These offer an incredibly high power output up to 9,000W and 5,000W, respectively. Both are completely modular, making it simple to customize your own system to your precise needs and desires.

The EP900 is compatible with two or four B500 batteries, offering a flexible capacity ranging from 9,920Wh to 19,840Wh. These can power a typical home with an average daily power consumption of 3,000Wh for nearly an entire week. What’s more, its ability to connect to the grid allows users to sell extra solar power back to the grid for extra cash in the pocket. Best of all, both are packed with an impressive ten-year warranty for completely peace of mind.

BLUETTI’s AC500 power station has the ability to store a maximum of 18,432Wh when paired with the B300S. In comparison to the EP900, the AC500 is much more portable, easier to setup/configure and doesn’t require any electrical experience. Plug and play operation offers the ideal situation for novices and veterans alike.


For RV Solar Systems

For vehicles, trailers, vans and RVs, there’s much less real estate in terms of space for installing solar systems. Because of this, BLUETTI’s AC200P or AC300 battery systems are highly compact, easy to lug around and provide plenty of power for a wide range of situations.

As a modular option, the AC300 boasts a maximum energy storage of 12,288Wh with the B300 battery and delivers up to 3,000W of AC power output. Conversely, the AC200P can draw 2,000W from its dedicated 2,000Wh capacity that’s built-in. For common ground, they both offer a wide range of output options so you have the freedom to power or charge virtually anything.

As you can see, selecting the correct battery for your solar system is critical for the best performance and highest amount of efficiency. LiFePO4 batteries, such as BLUETTI’s products, provide the ideal balance of stability, safety nd long-term cost performance. No matter if you’re living in a standard home or off-grid on the road in your RV, BLUETTI’s solutions are well-tailored for the needs of many.


The essence of BLUETTI is deeply rooted in fostering a greener world by championing sustainability and eco-responsible practices. With its wide array of earth-friendly energy storage solutions, BLUETTI strives not only to brighten up our living spaces but also to pave the way for a healthier, more sustainable future.

This dedication toward the preservation and betterment of our environment has powered BLUETTI’s growth, leading to a global presence that spans more than 100 countries. Today, the BLUETTI name inspires trust in millions of customers worldwide, who rely on their offerings for a myriad of indoor and outdoor power needs.

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