Technical FAQs 4

What does DoD mean on a battery?

DOD measures how much energy has been drawn from a battery compared to its full capacity. For instance, if a battery with a total capacity of 10 kWh has discharged 3 kWh, the DOD is 30%. This metric is the inverse of the State of Charge (SOC), which reflects the remaining capacity. In this example, with a 30% DOD, the SOC would be 70%.

What does a high DoD mean in a battery?

A higher DoD means you can use more energy stored in your battery. Many modern lithium-ion batteries now advertise a DoD of 100%, meaning you can discharge all the stored electricity before recharging. What is a battery’s state of charge (SoC)?

How much DoD should a solar power system have?

In contrast, for stationary energy storage systems, such as those used in solar power setups, a lower DOD (e.g., 20%-40%) is often preferred to enhance battery longevity and reduce replacement costs. Tailoring DOD levels to the specific demands of the application ensures optimal performance.

Do all batteries have a DoD?

Many batteries today feature depths of discharge, or DODs, of 100%, meaning it’s OK to use the battery’s entire energy capacity — but not all do. Let’s dive deeper into what affects battery lifespan and explore the DoDs of some of EnergySage’s most popular batteries.

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