Battery carbon, grown in orchards.
Endocarb turns walnut and almond shells into the hard-carbon anode that sodium-ion batteries need.
Every shell, one stream.
Walnut, almond and fruit-pit shells from Central Valley hullers, sorted by size and ash before they reach the kiln.
Carbonised at 1,300 °C.
A nitrogen kiln line in Hollister turns clean, dry shells into pure carbon, milled to nine microns and tested lot by lot.
Built for sodium-ion cells.
Three grades for cell makers, grid storage and research labs, each shipped with its own cell data.
Orchard shell to qualified anode powder in 9 days
Sodium-ion needs a carbon the industry does not yet make at home
Graphite cannot hold sodium. The anode that works is hard carbon, and most of it is imported or made from petroleum pitch. California’s orchards already grow the raw material.
The material
One feedstock, three grades of hard carbon
Endocarb sets the shell blend, the kiln profile and the milling for each grade, then proves every lot in its own coin and pouch cells. The data arrives with the drums, not weeks later.
Capacity grade
310 mAh/g / ICE 89 % / D50 9 µm
For energy cells where every milliamp-hour counts.
Request samples →Fast-charge grade
290 mAh/g / ICE 87 % / D50 6 µm
Smaller particles and a thinner coating for high charge rates.
Request samples →Grid grade
270 mAh/g / ICE 86 % / D50 11 µm
The lowest cost per kilowatt-hour, for stationary storage.
Request samples →Scale
Capacity that grows with the cell lines it serves
The pilot line in Hollister ships today. A demonstration line follows in 2027, sized for the first North American sodium-ion cell plants, and a commercial plant in 2030.
Pilot line
Tonnes a year
Running in Hollister
Demonstration line
Tonnes a year
Under construction, 2027
Commercial plant
Tonnes a year
Planned, 2030
