EV Technology

800 V · cell-to-body · SiC · zonal · by-wire

An EV-native car is designed around its pack, its high-voltage bus and its central computer, not around an engine bay. Chinese platforms now ship most of these technologies first and together; Tesla introduced several of them, and most legacy Western platforms adopt them one generation at a time.

Plan view of an EV-native car, nose to the right. The battery pack fills the floor between the axles, labeled cell-to-pack or cell-to-body at 400, 800 or 1,000 volts. A rear drive and a front drive, each with a silicon carbide inverter and an e-axle, sit at the ends of the pack. Along the top: zone controller rear left, central compute for ADAS, cockpit and OTA, heat pump on one loop, zone controller front left. Along the bottom: zone controller rear right, charge port with onboard charger and bidirectional charging, steer- and brake-by-wire, zone controller front right. Below, a bar chart of the current needed for 350 kW of DC charging: 875 A at 400 V, 438 A at 800 V, 350 A at 1,000 V. Cable heating scales with current squared, so half the current means a quarter of the loss. EV-NATIVE LAYOUT, PLAN VIEW (NOSE RIGHT) Zone rear left Central compute ADAS, cockpit, OTA Heat pump one loop Zone front left Rear drive SiC inverter e-axle Pack in the floor cell-to-pack or cell-to-body 400, 800 or 1,000 V Front drive SiC inverter e-axle Zone rear right Charge port OBC, bidirectional By-wire steer, brake Zone front right CURRENT NEEDED FOR 350 KW OF DC CHARGING 400 V pack 875 A 800 V pack 438 A 1,000 V pack 350 A Heating goes with current squared: half the current, a quarter of the heat.
350 kW at 800 V
about 440 A
BYD Super e-Platform
1,000 V, 1,000 kW
First SiC inverter car
Tesla Model 3
Hub
Vehicles

Finding

The technologies that separate a native EV from a converted one - high-voltage architecture, structural packs, silicon carbide power stages, zonal electronics with a central computer, and by-wire chassis - each cut cost, weight or charging time, and they compound when one platform carries all of them

Raising pack voltage from 400 to 800 V halves the current for the same power: 350 kW of DC charging needs about 875 A at 400 V and about 440 A at 800 V. BYD's Super e-Platform (March 2025) runs at 1,000 V and accepts up to 1,000 kW, about 1,000 A. Porsche's Taycan (2019) and Hyundai's E-GMP put 800 V into production; most new Chinese premium platforms now use it.

The pack became the floor and then the body. CATL's cell-to-pack design (2019) and BYD's Blade (2020) removed the module layer, which let lithium iron phosphate (LFP) cells, with lower energy density than NMC, reach long ranges at lower cost. BYD's cell-to-body (CTB) Seal and Tesla's structural pack for the Model Y then made the pack lid the cabin floor. The cost is repair: a structural pack is hard to open and is replaced, not mended. See battery pack manufacturing and EV battery chemistries.

The power stage moved to silicon carbide. Tesla's Model 3 (2018) used STMicroelectronics SiC MOSFETs in its traction inverter; SiC switches faster and loses less energy than silicon IGBTs, and the gain grows at 800 V, where silicon would need higher-voltage parts. Infineon, STMicroelectronics, onsemi, Wolfspeed and Rohm supply the devices, and BYD Semiconductor and Chinese substrate makers SICC and TanKeBlue are scaling fast. Inverter, motor and gearbox are now one housing - the e-axle, from BYD's eight-in-one unit and Huawei DriveONE to ZF, Bosch and Tesla's in-house drives.

The electronics consolidated. Instead of one controller per function, a zonal car has a few zone controllers that power and network everything in their corner, reporting to one central computer; Tesla's Model 3 started it, Rivian's second-generation R1 and XPeng's X-EEA followed, and VW's SSP and GM's next platforms are built on it. Fewer controllers mean less wiring and one software image, which is what makes full-vehicle over-the-air updates practical: Tesla shortened the Model 3's braking distance by over-the-air update in 2018. By-wire steering and braking (Tesla Cybertruck, NIO ET9) take the last mechanical links out, so software can also control how the car steers and stops.

Technology map

Eleven EV-native technologies and who leads them

First at scale, then the Chinese and Western leaders. Links go to the deeper page for each.

EV-native technologies
TechnologyWhat it changesFirst at scaleChinese leadersWestern, Japanese and Korean leadersMore
Dedicated skateboard platformPack in a flat floor, short overhangs, room for crash structureTesla Model S (2012)BYD e-Platform 3.0, Geely SEA, NIO NT3Hyundai E-GMP, VW MEB, GM UltiumPlatforms
800 V and 1,000 VHalf the current at the same power; thinner cables; faster DC chargingPorsche Taycan (2019)BYD Super e-Platform (1,000 V), XPeng, Zeekr, Li AutoHyundai E-GMP, Porsche, LucidEV platforms
Cell-to-pack and cell-to-bodyNo modules; the pack is part of the floor structureCATL CTP (2019), BYD Blade (2020)BYD CTB, CATL Qilin, Leapmotor CTCTesla structural packBYD Blade
LFP in mainstream carsCheaper, longer-lived cells without nickel or cobaltBYD, CATLBYD, CATL, Gotion, EVETesla and Ford buy LFP; LGES, Samsung SDI rampingChemistries
SiC traction inverterLower switching and conduction losses, most valuable at 800 VTesla Model 3 (2018)BYD Semiconductor; SICC, TanKeBlue substratesInfineon, STMicroelectronics, onsemi, Wolfspeed, RohmSiC and GaN
Integrated e-axleMotor, inverter and gearbox in one housingTesla, BYDBYD eight-in-one, Huawei DriveONEZF, Bosch, TeslaE-axle
Zonal E/E and central computeFewer controllers and less wiring; one software imageTesla Model 3 (2017)XPeng X-EEA, NIO, Li AutoTesla, Rivian Gen 2, VW SSP (planned)Zonal
Full-vehicle OTAPowertrain, chassis and ADAS updated after saleTesla Model S (2012)NIO, XPeng, Li Auto, BYD, XiaomiTesla, Rivian, GMOTA
By-wire chassisSteering and braking by wire; active suspension under software controlTesla Cybertruck steer-by-wire (2023)NIO ET9, BYD DiSus suspensionTesla, ZF, Bosch, ContinentalChassis
Heat pump and integrated thermal moduleOne loop moves heat between pack, motors and cabin; less winter range lossNissan Leaf (2013); Tesla Octovalve (2020)Sanhua, YinlunHanon, Mahle, Valeo, DensoHeat pumps
Bidirectional chargingCar powers tools (V2L), the home (V2H) or the grid (V2G)Nissan Leaf (CHAdeMO V2G pilots)BYD, NIO, Xiaomi (V2L)Hyundai and Kia, Tesla Cybertruck, GMV2X

Voltage

What voltage buys in charging current

Current for a given charging power at nominal pack voltage; real packs sag as they charge, so peak currents run higher.

Pack voltage and charging current
Pack voltageCurrent at 150 kWCurrent at 350 kWCurrent at 1,000 kWProduction examples
400 V375 A875 A2,500 A (not practical)Tesla Model 3 and Y, VW MEB, most LFP compacts
800 V188 A438 A1,250 APorsche Taycan, Hyundai Ioniq 5, Kia EV9, Lucid Air, XPeng G6, Zeekr 001
1,000 V150 A350 A1,000 ABYD Han L and Tang L on the Super e-Platform

Native vs converted

What a converted EV gives up

Converted and EV-native designs compared
AreaConverted from an engine platformEV-native
BatteryPack fitted around tunnels and fuel-tank space (VW e-Golf, Mercedes EQC)Flat pack across the full wheelbase; cell-to-pack or cell-to-body
Voltage400 V800 V or 1,000 V on new premium and Chinese platforms
ElectronicsDozens of controllers from many suppliersZone controllers and a central computer
SoftwareInfotainment updates at bestFull-vehicle OTA across powertrain, chassis and ADAS
ThermalSeparate loops, resistive heatersHeat pump with one integrated thermal module
ChassisMechanical steering column and hydraulic brakesSteer- and brake-by-wire with redundant actuators

Sources

Sources and scope

Scope
EV Technology
Sources
Maker releases (BYD Super e-Platform, Mar 2025; Tesla; Porsche; Hyundai; Rivian; XPeng); Consumer Reports (Model 3 braking, 2018); Oct 2026
Updated
October 2026