What Is the Best Battery for Storing Energy?

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Solar batteries serve an integral purpose as an energy-storing solution for a variety of applications. As Australia’s dedication to supporting a cleaner future through the use of renewable energy resources has increased, so has the push to evaluate all battery options for efficient solar storage in residential and larger-scale contexts.

Some of the most important factors to consider when determining what type of solar battery you should get include the amount of power it can provide as well as how long the battery will be able to last. Additional factors to consider may include the battery warranty, the reliability of the manufacturer, and the lifespan of the battery.

In general, solar batteries for home energy storage, as well as larger solar energy systems, are most commonly categorized within three types:

  • Lithium Ion
  • Lead Acid
  • Saltwater

Read on to learn more about these different battery types and which battery is currently #1 for efficient solar energy storage


Solar batteries possessing a lithium-ion chemical composition are the most common type of battery in home storage energy technology as a battery that features a long lifespan and a high depth of discharge (DoD). They are most popularly available in three different forms: as pouches within devices such as smartphones and tablets, prismatic types which are used for solar energy storage, and cylindrical.

Compared to other solar batteries, lithium-ion batteries are relatively compact, light, and therefore easier to install and replace. They can use organic or inorganic cells, but are most popular for their high charge and discharge efficiency, which provides substantial energy production. They can also provide more cycles throughout their long lifespan than some other varieties, such as lead acid batteries.

The only significant con of these batteries are their cost. As efficient as they may be, they are not considered the most economical choice for energy storage, which sometimes leads individuals to turn to more affordable options.

Lead Acid

Lead acid batteries serve as one of the most affordable battery options, comparative to the cost of the popular lithium-ion varieties. Although they have a shorter lifespan, they are a tested technology that has been in use for decades across the globe for off-grid energy storage. Therefore, they are often considered a tried-and-tried option of familiarity, if somewhat aged in their innovative capabilities.

Unlike lithium-ion batteries, lead acid batteries do require regular maintenance. When maintained properly, they can retain their efficiency quite well, but their low resilience to damage, shorter lifespan, and variable quality depending on the manufacturer have recently made it less preferable to newer storage technologies.

However, as one of the least expensive solar battery options on the market today, despite their shortcomings in efficiency and lifecycle, they may still be an adequate choice for homeowners looking for an economical solution for ample solar energy storage.


Saltwater batteries are the latest newcomer to home solar energy storage. Dependent on electrolytes in saltwater rather than heavy metals, it is a battery option that is considerably more recyclable than those above, which makes disposal more convenient.

What makes this still a less popular option, however, is its newness. Saltwater batteries are comparatively untested and are still undergoing developments to reach the efficiency status of other, older battery models. As far as efficiency and cost goes, saltwater batteries are in the middle of the highly-efficient lithium-ion batteries and the older lead acid varieties. They do, however, have a higher DoD than even the lithium-ion batteries, which refers to the battery’s capacity.

Summary: Which Battery Is the Best?

In recent years, lithium-ion batteries have paved their way to the top as an innovative technology surpassing lead acid batteries in energy density, lifecycle, and resilience. For the homeowners with budgetary concerns, the higher cost of lithium-ion batteries may not be preferable, but they have nevertheless seen tremendous growth in popularity for both home energy storage and large-scale solar systems.

At Queensland Solar and Lighting, we can consult, install, and maintain a range of solar panels and battery types. To learn more about which of our services can benefit you, contact us today!