High-performance, Non-Flammable Energy Storage - An Affordable Alternative to Lithium-ion Batteries

With system-level capacity up to 1.7+ MWh (DC) per 20′ container, Alsym Green offers higher energy density than other non-flammable, non-lithium options on the market today. Other benefits include high round-trip efficiency (RTE), long cycle life, and low self-discharge.

High-performance, low cost Alsym Green is ideal for grid and home storage applications as well as data centers, oil and gas, mining, manufacturing, ports, and heavy industry. Systems with Alsym Green can be used for for peak shaving, load shifting, backup power (hours to days), and voltage/frequency regulation. It’s suitable for both AC grid-tied and DC applications, and can even replace or augment diesel backup generators in microgrid environments.

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Alsym Green is an inherently non-flammable, non-toxic, non-lithium battery chemistry. It uses a water-based electrolyte and is incapable of thermal runaway, making it the only option truly suitable for urban areas, home storage, data centers, and hazardous environments such as chemical plants, oil and gas facilities, and steel mills.

Lithium-ion batteries are inherently flammable and mostly unsuitable for urbanized areas due risk of fires and highly toxic gases. Governments and communities are becoming reluctant to deploy lithium-ion batteries as high-profile storage fires become more common, and some are working to delay or even block new storage installations. Safer options exist, but most have low energy densities and low power with large footprints. This reduces viability in cities where land is expensive–assuming it’s even available. But building large battery installations in rural areas means adding new transmission capability, which is also expensive.

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Alsym Green is a wide-duration energy storage (WDES) solution that provides a level of flexibility and reliability that’s unmatched by current LDES solutions. It can be software-configured to fully discharge over any duration from 2 to 110 hours, and can recharge to full capacity in under 4 hours. Support for 2 to 24-hour discharge durations means you can use Alsym Green to take advantage of rate arbitrage opportunities during hour peak demand periods, as well as support intraday load shifting needs.

Alsym Green can even be used to provide continuous power for up to 5 days to address outages brought on by inclement weather or extended periods of low renewable generation. Other multi-day solutions have round-trip efficiencies below 50%, take up to 150 hours to charge, and lose 40% of that charge over 30 days. In comparison, Alsym Green can recharge to full capacity in under 4 hours and retain 92% of that charge over 30 days to ensure you’re ready for the next outage.

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Alsym Green combines low installed costs, high energy, and high round-trip efficiency with a minimal footprint to offer low, industry-leading levelized cost of storage (LCOS). Alsym Green cells are designed to be easily manufactured in lithium-ion battery factories, but without the need for expensive dry rooms, solvent recovery systems, and extended formation times. Using existing infrastructure lowers manufacturing costs and makes scaling up production easy compared to other non-lithium options that require custom factories and equipment. This helps to reduce up-front capital expenditures and lowers overall project costs.

Some LDES solutions have round-trip efficiencies (RTE) of less than 50% and lose up to 40% of stored energy over 30 days. This means more than half of the energy going in is wasted. In contrast, Alsym Green’s RTE is similar to lithium-ion and self-discharge is 8% or less per month. This lowers long-term operating costs and increases ROI for developers and grid operators. And with the ability to recharge to full capacity in under 4 hours, Alsym Green is able to cycle twice per day to take advantage of arbitrage opportunities.

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