[UPDATE] 🔋 Battery-Cells-Card v0.9.3 – **NEW LOOK** – Cell Monitoring for ALL Battery Types

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Battery Cell Card - Real-Time Battery Cell Monitoring

Version: 0.9.3
Description: A custom Home Assistant card for visualizing battery cells, cell voltages, SOC, balancing status, and voltage differences etc.

Ideal for LiFePO₄ battery systems, also for NMC/NCM and lead-acid and other DIY-Batterys

:sparkles: New

  • New 3D look → chrome-finished battery housing.

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  • Create a fully customized battery scale directly in the visual editor (voltage points, colors, segment heights, labels).
  • 7 custom battery scale presets - create your own favorite!
  • Toggleable scale color gradient.

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  • Disc-style scale with three intensity levels – Subtle, Medium, and Strong.
  • Chunk mode completely reworked. (Please provide feedback on whether it displays correctly on iPhone!)
  • Selectable battery type completely reworked and further enhanced.
  • Visual editor expanded and redesigned.
  • Native Home Assistant editor components for a better editing experience.
  • Cells and additional sensors can now be added, edited, removed, and sorted directly in the visual editor.
  • Custom names and icons for cells and additional sensors.
  • Editor available in German and English.
  • Auto-Chunk mode → Auto4, Auto8, or Manual.
  • Chunk height can be adjusted manually in the editor.
  • Chunk cell width can be adjusted manually in the editor.
  • Optional smooth color gradients for custom scales.
  • Adjustable font size for additional sensors.
  • Improved automatic detection of the lowest and highest cell voltage.
  • Improved balancing and cell voltage difference display.
  • Improved support for voltage sensors using V or mV.
  • grid_options for controlling the card size.
  • Significant performance improvements and many other small changes and enhancements.

Full changelog: battery-cell-card/changelog.md at main · jinx-22/battery-cell-card · GitHub

[!CAUTION]
Note:
The bar heights indicate cell voltage, not state of charge.
The percentage SOC can be read in the legend if an SOC sensor is assigned.

[!TIP]

:open_book: Editor documentation

Every setting of the visual editor is explained step by step, with the purpose of each option and when it is visible.

:backhand_index_pointing_right: Editor documentation

Installation

HACS

Click the button to add the repository in HACS, download the card and reload your browser.

Open your Home Assistant instance and open a repository inside the Home Assistant Community Store.

Manual Installation

  1. Download battery-cells-card.js
  2. Copy it to /config/www/community/battery-cell-card/
  3. In Home Assistant:
    • Settings
    • Dashboards
    • Three-dot menu
    • Resources
    • Add Resource
    • URL: /local/community/battery-cell-card/battery-cells-card.js
    • Type: JavaScript Module
  4. Reload browser (CTRL + F5)

The card is now selectable and visible in the GUI.

Github

:star: Support the Project

:star: If you find Battery Cell Card useful, please consider giving this repository a Star! It helps others discover the project and supports further development.

If you would like to support the project even more, a small donation via Donate Bitcoin or Donate Lightning is greatly appreciated.

Every Star and every contribution helps — thank you for your support!

2

This looks interesting.

How does it gather the data necessary to monitor at battery cell level? My Solaredge battery, as far as I’m aware, doesn’t expose battery cell data to Home Assistant via any official or custom integration.

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Hi, thanks for your interest! :blush:

The card itself does not read or collect the battery data directly. It visualizes the cell-level sensors that are already available in Home Assistant.

For the basic cell visualization, you need at least one voltage sensor per battery cell, for example:

  • sensor.battery_cell_01

  • sensor.battery_cell_02

  • sensor.battery_cell_03

  • etc.

The cell voltage can be provided in V or mV.

Additional sensors such as SOC (%), cell voltage difference/delta, balancing status, minimum/maximum cell voltage, and other battery sensors are optional and can be displayed as well.

So, unfortunately, if your SolarEdge battery does not expose the individual cell voltages through its official integration, API, or another custom integration, the Battery Cell Card cannot retrieve the cell data by itself.

In short: the card is the visualization layer — the individual cell voltages need to be provided to Home Assistant first. If you can get the individual cell voltages into Home Assistant as sensors, the card can then visualize them.

4

Thanks for the explanation. Maybe I’ll submit a feature request to see if the official or custom Solaredge integrations can expose detail of the individual battery cells.

1 Like
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A small preview of the next version…

brave_Q9NZ97mdqO_unter 4mb

with various combinable animations!

Charging animation
Discharging animation
Balancing animation