Tesla 2026.32: what the new battery-capacity signal tells us
Tesla added a nominal full-pack energy field on 28 August 2026. Here is what changed, what Odomojo received and what still needs validation.
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On 28 August 2026, Tesla merged a change adding ten fields to its public Fleet Telemetry source. One of them, NominalFullPackEnergyKwh, gives battery monitoring a useful new input: nominal full-pack energy reported by the vehicle. Tesla identifies the new fields with firmware 2026.32 and telemetry client 1.3.0 in the merged change.
During a limited Odomojo check in September, we received a valid reading of this field from a vehicle running compatible software. That establishes a working reporting path. Turning the reading into a dependable battery-health comparison still requires a suitable original reference and further validation.
What happened in late August?
The August 28 date is the public source merge date. It should not be read as the date every Tesla received an over-the-air update or began reporting the new fields.
The addition includes three battery-related signals:
| Field | What Tesla’s change identifies |
|---|---|
NominalFullPackEnergyKwh |
Nominal full-pack energy |
BrickSocMinPercent |
Minimum brick state of charge |
LifetimeEnergyChargedKwh |
Lifetime charged energy |
These are separate inputs, with different purposes. The change does not describe any of them as a ready-made battery-health percentage. We have verified Odomojo receipt of the nominal-capacity signal; this article makes no receipt claim for the other two.
Why we investigated the new field
Our battery-health investigation began with the familiar readings available to a tracking service: charge percentage and energy remaining. A tempting shortcut is to divide remaining kWh by the charge fraction and treat the result as full capacity.
The definitions make that shortcut questionable. Tesla describes EnergyRemaining as nominal remaining energy and Soc as usable state of charge in its field reference. Combining the two requires validating their relationship, including any buffers. A plausible-looking result is not enough.
Reviewing Tesla’s public source revealed the newer full-pack signal. It gave us a direct reported capacity input to investigate, without having to infer full capacity from a single remaining-energy observation.
What we have verified
We added support for the field in Odomojo’s receiving and processing path, checked how valid and invalid observations are handled, and kept each reading’s source time. Those software checks preceded enabling collection for a limited vehicle check.
On 26 September 2026, that check produced a valid nominal full-pack energy observation from a real vehicle running the required software. We also checked that ordinary telemetry and history remained available. No special discharge test was used to obtain the capacity reading.
This establishes that the new signal can reach Odomojo from a supported vehicle. It does not measure its accuracy against laboratory capacity, validate every Tesla model or establish a battery-health percentage across the fleet.
The original-capacity reference remains the hard part
Our comparison needs two compatible values: current nominal full-pack energy and an original nominal reference for the battery. The telemetry field supplies the first input. It does not identify a trustworthy original denominator by itself.
We therefore keep catalogue suggestions separate from vehicle observations. Saved vehicle configuration helps narrow the candidates; ambiguous matches stay visible, and customers can override a suggestion. A reference based on a similar variant remains a reference, with its uncertainty shown.
This also explains why we retain a capacity history independently of the percentage. A later correction to the original reference should change the comparison without rewriting what the car reported.
What we still need to learn
The next work is to compare suitable repeated observations with additional evidence, including existing manufacturer test results where available, and to improve reference matching. We also need a clearer understanding of the signal’s buffers, software limits and behaviour under different conditions.
We are not publishing a typical degradation rate, an accuracy claim or a universal rollout announcement from this initial check. The September check used selected vehicles.
Rollout update, 20 October 2026: collection is now available to all eligible connected Teslas with software 2026.32 or later. Odomojo checks reported firmware periodically and requests capacity automatically when setup, manufacturer permission, tracking hours and trial or subscription access allow it. Paused vehicles remain paused. A received valid reading and a suitable original reference are still required for an estimate. See current battery availability.
For owners, the practical step is to check the method, observation time and original reference behind any health percentage. Read Tesla battery health for the vehicle-specific explanation, or start with the general SoH guide.