About the Batteries

The most up-to-date answers to questions about our batteries, including size, weight, and capacity, can be found in our product spec sheets.

What is the battery chemistry?

Our unique saltwater battery chemistry is called Aqueous Hybrid Ion (AHI™). The chemistry uses a poly-ionic system that has Na+, Li+ and H+ ions functional in the system, the cathode is manganese oxide, the anode is a carbon titanium phosphate composite, and the saltwater electrolyte is a neutral pH Alkali-ion.

Are Aquion batteries flow batteries?

No. Aquion batteries are not flow batteries. Flow batteries consist of large tanks full of chemicals that are pumped back and forth.  Aquion’s batteries are sealed electrochemical energy storage systems that are simple, safe, efficient, and low maintenance. Learn more about our battery technology.

Are the batteries safe?

Yes. Our batteries are non-toxic, non-flammable, and non-explosive. AHI chemistry is inherently safe and not capable of thermal runaway. The batteries are also touch-safe.

Can the batteries be recycled?

Battery recycling requirements vary greatly by country/jurisdiction, but since Aquion batteries are free of toxic chemicals and heavy metals, they’re generally the easiest and safest batteries to recycle:

  • The polypropylene plastic housing and the metal hard goods can be recycled.
  • The active materials are non-toxic and non-hazardous and can be disposed of as regular refuse.

Again, always refer to local recycling regulations for proper disposal.

What components are needed for installing a complete energy storage system?

All energy storage systems require additional components such as wires, fuses, charge controllers, and inverters. The exact components needed are dependent upon your specific application. Aquion does not supply these components. Work with an Aquion installer near you to properly configure and install your system.

Which inverters and charge controllers are compatible?

Our batteries are designed to be inverter- and charger-agnostic, and are compatible with most of the leading inverters and charge controllers on the market, when using recommended settings. Our batteries follow a typical three-stage charge profile, similar to lead-acid batteries.
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What is the operating voltage of the batteries?

Our 48 volt batteries operate at 48 volts nominally with a voltage range of 40 to 59.5 volts.

Our 24 volt batteries operate at 24 volts nominally with a voltage range of 20 to 29.7 volts.

Can Aquion batteries be used in high voltage applications?

Yes, Aquion’s battery modules can be connected in series up to 1000Vdc. High voltage systems require the use of Aquion’s Battery Monitoring System (BMS).



What types of applications are the batteries best-suited for?

Currently, the best applications for our batteries are stationary long-duration storage applications, defined as 4 to 20+ hour charge and discharge cycles. An example would be a basic microgrid in which the batteries charge from solar panels during sunlight hours for 8 hours, and then discharge to supply energy overnight for 16 hours. Long duration applications our batteries can be used for include residential and commercial solar, green architecture, off-grid applications, microgrids, telecom, C&I energy management, and utility services.

Can I use Aquion batteries in my boat/RV?

We love boats, too, but Aquion batteries are designed for stationary applications.


About Aquion Energy

When was Aquion founded?

The company was founded In June 2008, and spun out of a lab at Carnegie Mellon in 2010. There’s a TED talk for that.

Who are your investors?

See the roster.

How can I invest?

Aquion Energy is a privately held company and stock is not available to public, retail investors. We secure our financing through larger institutional and corporate investors – investors of this type should forward their details to


How to Purchase Batteries

How much do the batteries cost?

For batteries for your home or small business, contact your local installer for system sizing and pricing. Some of our distributors and installers provide pricing on their websites. For commercial-scale projects, contact the Aquion sales team for system sizing and pricing.

I’m ready to buy, now what?

For small-scale systems, such as for homes and small businesses, we sell exclusively through our installer network. Aquion does not sell small-scale systems directly to end customers. Our installers provide system sizing, pricing, installation, and service. Find an installer near you.

For large-scale commercial, industrial, utility, and OEM applications, Aquion works directly with customers to design and implement high-performance energy storage systems. Contact our sales team to get started with an Aquion sales engineer.


Technical Support

Where do I go for technical support?

Homeowners, Businesses, and Utilities
Please visit our Technical Support Page.

For all inquiries, go to the Partner Portal to access:

  • Product documentation
  • FAQs
  • Partner forums for sharing information and best practices
  • Support contact information

If you don’t have a portal login, contact your Aquion sales director.