Uploaded August 2025 | Updated September 2026, 3 weeks ago

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**PwrTool 500** is an open-source battery and power monitor designed for off-grid energy systems. It integrates seamlessly with **Home Assistant** and supports direct customization via **ESPHome** or your own firmware. Designed for most 12-48 VDC systems, PwrTool 500 is built to handle up to **500 A peak current** across **6–60 VDC**, and provides detailed insight into your energy flow, generation, storage, and usage so you can monitor and automate data-informed actions.

Learn more: crowdsupply.com/voidbox-industries/pwrtool-500

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