Battery

Batteries can be used to store energy for later use. In previous work, we have used batteries to store energy from the grid when the carbon intensity is low, and use this energy when the carbon intensity is high.

Batteries are defined using the following parameters:

variable	type	Unit	required?	default	description
name	string	N/A	no	Battery	The name of the battery. This is only important for debugging and post-processing
capacity	Double	kWh	yes	N/A	The total amount of energy that the battery can hold.
chargingSpeed	Double	W	yes	N/A	Charging speed of the battery.
initialCharge	Double	kWh	no	0.0	The initial charge of the battery. If not given, the battery starts empty.
batteryPolicy	Policy	N/A	yes	N/A	The policy which decides when to charge and discharge.
embodiedCarbon	Double	gram	no	0.0	The embodied carbon emitted while creating this battery.
expectedLifetime	Double	Years	yes	0.0	The expected lifetime of the battery.

Battery Policy

To determine when to charge and discharge the battery, a policy is required. Currently, all policies for batteries are based on the carbon intensity of the grid.

The best performing policy is called "runningMeanPlus" and is based on the running mean of the carbon intensity. it can be defined with the following JSON:

{
    "type": "runningMeanPlus",
    "startingThreshold": 123.2,
    "windowSize": 168
}

In which startingThreshold is the initial carbon threshold used. windowSize is the size of the window used to calculate the running mean.

Alert

This page with be extended with more text and policies in the future.