Why LFP? Your Questions Answered About the Battery Chemistry Powering OptiGrid Chargers

At OptiGrid, we don't just build battery-integrated chargers; we obsess over every component inside them. That starts with the battery. Here are the most often asked questions about our choice of Lithium Iron Phosphate (LFP) chemistry.

Q: What kind of battery is inside an OptiGrid charger?

Every OptiGrid Reservoir DC fast charger uses LFP batteries with a total capacity of 180 kWh. LFP is a specific type of lithium-ion chemistry known for its exceptional stability, longevity and safety record in demanding commercial and industrial applications.

Q: Why LFP?

LFP excels in three key areas: longevity, safety and sustainability.

The industry-standard lifetime for LFP batteries, like those used by OptiGrid, is 10+ years with 8,000+ full charge/discharge cycles. End-of-life for these cells is defined as 70% of original capacity, meaning even after 10 years, the battery retains most of its usable capacity.

For a battery-integrated charger that cycles energy daily, that durability translates directly into lower replacement costs and consistent, predictable performance over the life of the system.

Q: How safe is LFP chemistry?

LFP has one of the strongest safety records of any battery chemistry available today. Compared to other chemistries LFP has a much higher flashpoint. This makes it highly resistant to thermal runaway, the overheating condition that is the primary safety concern with Li-ion batteries. It is one of the main reasons LFP is used in nearly all battery energy storage systems (BESS), which must meet strict safety standards. Today, battery thermal events are extremely rare compared to years past.

Q: Does LFP perform well in cold weather?

Cold-weather operation is a solved problem for lithium-ion batteries. BESS and EVs regularly operate in extreme climates reaching temperatures as low as -40°F (-40°C). Battery pack heaters keep the pack at optimal temperatures, ensuring it performs even in the most extreme conditions. In EVs, capacity loss at low temperatures is largely due to cabin heating, which is a non-issue for BESSs since there are no passengers and the cell heaters can be powered from the grid rather than the battery.

Q: How does LFP impact the environment?

LFP is one of the cleanest battery chemistries available. It contains no toxic materials, heavy metals, or rare earth elements, and importantly, none of the nickel or cobalt found in other Li-ion chemistries, the two most problematic minerals in the industry. Its components are more easily sourced and ethically, with less exposure to supply chain risk. 

LFP batteries are also highly recyclable at end of life and can be repurposed for second-use applications, like stationary energy storage, increasing their usable lifetime significantly.

For fleets with sustainability commitments, a charger built around LFP is a solid decision.

Q: How does this translate into value for fleet operators?

Using LFP delivers the lowest total cost of ownership over the longest possible service life compared to other Li-ion chemistries.A charger built to last, operate safely, perform reliably in any climate and minimize environmental impact isn't just a better product; it's a smarter business choice. That's why LFP is the chemistry of choice at OptiGrid.

Ready to learn more about how OptiGrid's battery-integrated DC fast chargers can work for your fleet? Contact us at info@optigridllc.com.