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As solar energy becomes increasingly popular, many homeowners and businesses are looking to store excess energy in batteries for later use. In this guide, we'll explore everything you need to know about solar batteries, including what they are, what they're used for, the different types of batteries available, and top brands on the market.

What are solar batteries ?

Solar batteries are devices that store excess energy generated by solar panels during the day, allowing homeowners and businesses to use that energy at night or during times of high energy demand. Batteries for solar systems are typically rechargeable, allowing for long-term energy storage.

What Are Solar Batteries Used For?

Solar batteries are used to power homes and businesses during periods of low solar energy production, such as at night or during overcast weather. They can also be used to provide backup power during power outages.

Types of Solar Batteries:

Lead Acid Batteries:

Lead acid batteries are the oldest type of battery on this list: they’ve been around since the 19th century! Lead acid batteries use different types of lead compounds at the two separate electrodes (positive & negative) and an acidic electrolyte–hence, “lead acid”. These types of batteries are not particularly power dense (they take up a lot of space), and they’re not designed to be discharged fully all the time (i.e., only a 50% depth of discharge). However, lead acid batteries have long been used in cars as the primary power source to provide the surge of power necessary to start your gasoline engine.

Lithium-Ion Batteries:

If you have a solar battery at your home or business, it is almost certainly a lithium ion battery. Lithium ion is the main chemistry used in batteries offered by the primary players in today’s solar-paired storage market, such as Tesla, LG Chem, Generac, Panasonic, and many more. These batteries use lithium compounds for an electrode and are called lithium ion batteries because of the way they utilize the flow of ions away from a lithium compound to store energy. The category of lithium ion batteries actually covers a number of different chemistries, each of which have slightly different characteristics. The two most popular types of lithium ion batteries are lithium nickel manganese cobalt oxide, or NMC, batteries and lithium iron phosphate, or LFP (for iron’s chemical sign of Fe). NMC batteries tend to be more power dense (i.e., smaller for the same storage capacity), while LFP batteries tend to have longer lifetimes.

Flow batteries

As opposed to passing ions from a metal compound to another metal compound through an electrolyte like lead acid and lithium ion batteries, a flow battery passes ions from one tank of liquid to another, and then back again. These types of batteries–which are also called redox flow batteries due to their use of reduction/oxidation as a way to pull ions from one liquid and give them to another–are not particularly power dense (they can be quite big), but can store much more energy than a typical lithium-ion home battery. While not particularly common at the moment, they could become very popular in the coming decade.

Top Battery Brands for Solar Panel Systems:

  • Tesla Powerwall

  • LG Chem

  • Generac

  • Enphase Energy

  • Panasonic

At Solar365 RGV we use only the highest qualityBatteries from top brands in our solar panel installations, to ensure maximum efficiency and reliability for our clients. However for Solar365 RGV our go to Batteries is always LG CHEM, GENERAC, OR PANASONIC.

Why Choose LG Chem Battery ?

  • High energy density

  • Long cycle life

  • Wide range of capacities

  • Compact size

  • Compatible with many inverters

Why Choose Generac Battery ?

  • Competitive pricing

  • Modular design allows for easy expansion

  • Compatible with Generac's own inverters and other brands

  • Can be used for backup power in addition to solar

Why Choose Panasonic Battery ?

  • High energy density

  • Long cycle life

  • Good performance in high temperatures

  • Compatible with many inverters

Why Choose Tesla Powerwall ?

  • High energy density

  • Long cycle life

  • Integrated inverter

  • Sleek design


Investing in solar batteries is a smart way to ensure that you have reliable power when you need it, even when the sun isn't shining. By choosing the right type of battery and brand for your needs, you can enjoy the benefits of solar energy even when the sun goes down. At [Your Company Name], we offer a wide range of solar batteries and can help you choose the best option for your solar system. Contact us today to learn more!




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