Powerwall Companion

Can a Spare Smartphone Replace a Dedicated Energy Monitor?

Powerwall Companion transforms your unused Android device into a dedicated, always-on dashboard for your Tesla Powerwall 2 battery system. Developed by Thirty Hippos, this utility app provides real-time visibility into solar generation, battery storage levels, and household consumption—all without requiring additional hardware purchases or complex wiring. It is an independent third-party tool that interfaces with your Powerwall 2 Gateway to deliver continuous energy data, making it a cost-effective alternative to purchasing a separate monitoring panel.

Key Functional Capabilities

• Always-On Display Mode: The app supports a persistent screen-on function that prevents your device from sleeping, ensuring the dashboard remains visible at all times. This mode is ideal for wall-mounted tablets or dedicated phones placed in a central location like a kitchen counter or utility room. You can adjust the display brightness and timeout settings directly within the app to balance visibility and screen longevity.

• Live Energy Flow Visualization: The main interface presents a real-time animated diagram showing the direction and magnitude of energy flow between your solar panels, Powerwall 2 battery, home loads, and the grid. Green arrows indicate battery discharge, yellow arrows represent solar generation, and blue arrows show grid import or export. This visual feedback allows you to instantly understand whether your home is running on solar, battery, or grid power.

• Historical Data Logging: The app stores up to 7 days of energy usage history, including daily solar production, battery charge/discharge cycles, and net grid consumption. You can scroll through past days to compare performance, identify usage patterns, and verify that your Powerwall is operating as expected. Data is presented in clear bar charts and line graphs for quick analysis.

• Customizable Dashboard Layout: You can rearrange the information tiles on the main screen to prioritize the metrics that matter most to you. Options include battery state of charge (SOC), current power draw in kilowatts, total energy stored, solar panel output, and grid status. The layout supports both portrait and landscape orientations, adapting to whatever device mounting you choose.

• Gateway Connection Management: The app automatically discovers your Powerwall 2 Gateway on the local network using mDNS. If your network configuration is more complex, you can manually enter the gateway IP address. The app supports both local API access (for users on the same network as their gateway) and remote access via Tesla's cloud API (for off-site monitoring). Connection status is clearly indicated with a green or red icon.

Detailed Feature Breakdown

• Real-time battery state of charge (0-100%) with percentage and visual gauge display.
• Live solar panel generation data updated every 5 seconds from the Powerwall gateway.
• Household consumption tracking showing total power draw and individual circuit breakdowns.
• Grid import/export monitoring with net metering support for solar buyback programs.
• Automatic day/night mode switching that adjusts dashboard brightness based on ambient light.

Download Powerwall Companion Now

Turn your idle smartphone into a professional-grade energy monitoring station. Gain full visibility into your Tesla Powerwall 2 system without buying expensive third-party displays. Download the APK now and start tracking your solar production and home consumption in real time.

Technical Disclaimer: This app requires a Wi-Fi or mobile internet connection to communicate with your Tesla Powerwall 2 Gateway. It is not affiliated with, endorsed by, or sponsored by Tesla Inc. or any of its subsidiaries. The app is designed for informational purposes only and should not be used as a primary safety or control system for your electrical installation. Users must be at least 13 years of age to download and use this application. Data consumption varies based on update frequency and historical logging duration; typical usage is under 50 MB per month. In-app purchases may be available for premium features. Always consult a qualified electrician before making changes to your home electrical system.