Depth of Discharge (DoD)
The percentage of a battery's total capacity that is used in a single discharge cycle. Most lithium battery systems are rated at 80–90% DoD — meaning a 100 kWh battery delivers 80–90 kWh of usable energy per cycle. Repeatedly discharging below the recommended DoD accelerates battery degradation. Microgrid controllers enforce DoD limits automatically, maintaining a minimum state of charge floor for emergency reserve and battery longevity.
Related Terms
On-site electrochemical energy storage that allows a property to store electricity and discharge it on demand. In a microgrid, storage may support backup operation, energy buffering, and reduced generator runtime. Transfer behavior depends on the selected equipment, system design, and operating conditions. Storage is sized in kWh for energy capacity and kW for power output; both metrics affect supported loads and duration.
Two common lithium battery chemistries used in residential storage. Lithium Iron Phosphate (LFP) prioritizes safety, long cycle life (3,000–6,000+ cycles), and thermal stability — better for whole-home applications where longevity and safety are paramount. Nickel Manganese Cobalt (NMC) offers higher energy density (more kWh in less space) but with higher thermal sensitivity. Residential microgrids designed for multi-decade operation typically favor LFP chemistry.
Everything Stays On.
Customer-sited generation + energy storage + backup generation + intelligent controls = whole-property power continuity.
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