# AnnualVirtualStorage Node

## General Description

The **AnnualVirtualStorage node** is a virtual storage which resets annually, useful for licences. [API Reference](https://pywr.github.io/pywr-docs/master/api/generated/pywr.nodes.AnnualVirtualStorage.html).

## Primary Attributes

<table><thead><tr><th width="180.33333333333331">Name</th><th width="318">Description</th><th>Required</th></tr></thead><tbody><tr><td>reset_day</td><td>The day of the month (0-31) to reset the volume to the initial value</td><td>Required</td></tr><tr><td>reset_month</td><td>The month of the year (0-12) to reset the volume to the initial value</td><td>Required</td></tr><tr><td>reset_to_initial_volume</td><td>Reset the volume to the initial volume instead of maximum volume each year (default is False)</td><td>Required</td></tr></tbody></table>

## Examples

coming soon...