Tesla · utility-scale
Tesla Megapack 2 XL
shippingskidAC block (PCS integrated)liquid-cooledLFPBNEF Tier 1
Everything below comes from what Tesla publishes about the Megapack 2 XL: the datasheet, the product page and press releases. Where a figure is not published, the field says so — we do not estimate.
Variants
Energy figures are nominal (beginning of life) as published by the manufacturer. One model, several duration options — the same enclosure with different power ratings.
| Variants | Energy | Power | Duration |
|---|---|---|---|
| 2 Hour Duration — 1,927 kW / 3,854 kWh | 3.854 MWh | 1.927 MW | 2 h |
| 4 Hour Duration — 979 kW / 3,916 kWh | 3.916 MWh | 979 kW | 4 h |
Specifications
| Cell chemistry | LFP |
|---|---|
| Cell capacity | not published |
| Cell configuration | not published |
| Cell supplier | not published |
| Form factor | skid |
| Block type | AC block (PCS integrated) |
| PCS integrated | yes |
| DC voltage | not published |
| Cooling | liquid-cooled |
| Ingress protection | IP66 |
| Operating temperature | not published |
| Dimensions (L × W × H) | 8814 × 1651 × 2794 mm |
| Weight | 38.1 t |
| Energy density | not published |
| Round-trip efficiency | 92% |
| Cycle life | not published |
| Calendar life | not published |
| Warranty | 20 y |
| Fire suppression | not published |
| Generation | 2 |
| Announced | not published |
Certifications
UL 1973UL 9540UL 9540AUL 1741IEC 62619
Key facts
- Round-trip efficiency 92.0% (2h) / 93.7% (4h) per Tesla configurator
- Interconnection 480 V AC 3-phase; ships fully assembled with built-in foundation
- W 347 in x D 65 in x H 110 in; 84,000 lbs max
- 20-year warranty and performance guarantees (tesla.com/megapack)
- Built at Megafactory Lathrop and Megafactory Shanghai (80 GWh/yr combined)
What Tesla does not publish for this model
These fields are empty because no public datasheet or release states them. That is information too: ask for these numbers before you shortlist.
Cell capacityCell configurationCell supplierDC voltageOperating temperatureEnergy densityCycle lifeCalendar lifeFire suppressionAnnounced
Price signal
$266–315/kWh
The only truly public price in this index: Tesla's US configurator. July 2024 — $1,039,290 for 1.9 MW/3.9 MWh ($266/kWh) before shipping and installation; 2025–2026 configurator data puts a 4-hour block in California at ~$1,227,090 (~$315/kWh), varying by state. This is a US-market AC system with PCS (tariff and 45X context included) — not directly comparable to $71–89/kWh ex-works-China DC blocks.
From the Coloprice BESS Price Index — a benchmark, not an offer. See the index for how each figure was collected. See the BESS Price Index →
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Sourcing quote for Tesla Megapack 2 XL
Coloprice is published by Dream View, a China-sourcing company. For commercial-scale projects we buy BESS containers factory-direct — verified manufacturer, certification review, pre-shipment inspection, export and freight — for a flat 10% fee.
Sources: Tesla — Order Megapack: Product Details · Tesla — Megapack