Tesla Model Y · 2020–2025
Tesla Model Y Battery Size (BCI Group and CCA)
The specification is not the same across every year we cover, the table below shows exactly where it changes.
Last verified
Has the Tesla Model Y battery specification changed by year?
| Model years | Group size | CCA | Type | Location |
|---|---|---|---|---|
| 2025–2025 | Group Tesla proprietary ~15.5–16V lithium-ion low-voltage battery | N/A | N/A | Low-voltage battery under front trunk area / behind front apron (Tesla service access) |
| 2020–2024 | Group 85B24LS (JIS) 12V lead-acid, early builds only; see notes | N/A | N/A | Front trunk area, under the plastic underhood apron |
Each row links to the full specification for that generation, including trim-by-trim breakdowns and the part numbers. Where engines within a generation differ, that page separates them.
Full specifications by generation
The battery on a Tesla Model Y is set by its generation, not its model year, so each generation has one page carrying the complete figures, part numbers and fitment notes for every year it covers.
Tesla Model Y battery: common questions
What size battery does a Tesla Model Y take?
- BCI group Tesla proprietary ~15.5–16V lithium-ion low-voltage battery. Group size is a physical dimension and terminal-position standard, so a battery from a different group may not clamp down or may put the terminals on the wrong side.
Where is the battery on a Tesla Model Y?
- Low-voltage battery under front trunk area / behind front apron (Tesla service access).
Does a Tesla Model Y need the battery registered after replacement?
- This is the low-voltage accessory battery, not the drive pack. 2025 Juniper builds continue the Tesla-proprietary lithium-ion low-voltage battery (later 2026-model-year builds reportedly moved to a 12.8V LFP unit). It is designed to last the life of the car, is monitored by the vehicle, and is not a DIY or parts-store replacement, Tesla service handles it. No lead-acid option exists on this generation.
Sources
- Tesla Model Y Owner's Manual (2025+), Wheels and Tires
- Tesla DIY, Replacing Cabin Air Filters (Feb-2025 production changes)
- Tesla Support, Vehicle Maintenance (official intervals)
- Car and Driver, 2025 Model Y (Juniper) US details, 327-mi EPA range
- T Sportline, Model Y Juniper wheel & tire guide (Crossflow/Helix/Arachnid OE fitments)
- NHTSA recall lookup, 2025 Tesla Model Y (25V-002, 26V-315)
- Kelley Blue Book, 2025 Model Y ranges
- Wikipedia, Tesla Model Y (Juniper timeline, Performance/Standard 2026 launch)
Find your exact Model Y
Jump to a model year for the engines it offered, what changed, and the problems documented against it: