If Sense is unable to reconnect, the Sense system can hold at least six hours of device-specific, per-second data. After that space is exhausted, the data may be lost, but the monitor will try to preserve per-minute data for whole home consumption and solar production for a minimum of three months.
| Note: If multiple power outages occur while Sense is disconnected from Wi-Fi, further data loss can occur. |
For more information, please read this blog: Keeping Connected: How to Improve Your Home's Wi-Fi