Availability KPI for battery units

Last modified: 2026-08-26

The KPI for a battery unit’s availability is calculated by the portal at daily intervals.

Definition

The Availability (battery) KPI is the percentage of time a battery unit is operational, meaning available for charging and discharging.

Variable	Unit	Description	Further details
Availability	%	Percentage of time a battery unit is operationally ready	KPI only available as of daily values
n	–	Number of timestamps
A(t)	–	Availability state at timestamp t. Can be `0` (battery unit not available), or `1` (battery unit available) if all of the following conditions are true: V_min ≤ B_U,DC (t) ≤ V_max 0 ≤ B_SOC (t) ≤ 100 B_U,DC and B_SOC and B_I,DC are available as numeric values Anti-freeze check positive, see below
V_min, V_max	V	Voltage limits	configure separately, see below
B_U,DC	V	Actual DC voltage	data point `B_U_DC`
B_SOC	%	Actual SOC/State of charge	data point `B_SOC`
B_I,DC	A	Actual DC current	data point `B_I_DC`

Further details and prerequisites:

The KPI can only be used as daily or longer intervals. You can not display it in higher resolutions, like 15- or 1-minute intervals.
To check the conditions, the data points B_U_DC, B_SOC, and B_I_DC are used. See Import specification (external link).
You must configure the battery unit's voltage limits in the portal. See Configure the battery units' operating parameters.
Anti-freeze check: Is positive if telemetry was not frozen during the last 30 min, meaning the telemetry data changes as expected during active battery operation (> 0.01 C), indicating that measurements are being updated. To perform a thorough check, the nominal capacity must be configured, see Configure the battery units' operating parameters.

The Availability (battery) KPI can be used for the following functionalities:

User-defined charts and heatmaps. You can find the KPI in the data point category KPI.

On 15th July, the unit Battery-Container 1 was available 99.65 % of the time.