Elegoo

Elegoo Mars 4 Ultra

LCD 9K resin printer. Build volume: 153.36 × 77.76 × 165 mm.

Assessed from documentation Updated on October 4, 2026

How to recognize it: Check the full model name “Mars 4 Ultra” on the label or in device information. Suffixes and revisions identify different models; check the source before selecting parts.

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Technical specifications

Manufacturer specifications for the listed configuration. Notes identify accessories, measurement conditions and calculated values.

Technology and structure2

Technology	MSLA
Build area shape	Rectangular

Build area and volume4

Build area X	153.36 mm
Build area Y	77.76 mm
Build area Z	165 mm
Build volume	1.9677 L Calculated from nominal X × Y × Z dimensions.

Speed and performance1

Advertised maximum vertical speed	150 mm/h Manufacturer claimed maximum; depends on resin and settings.

Resolution7

Minimum layer thickness	0.01 mm
Maximum layer thickness	0.2 mm
Exposure LCD diagonal	7 in
LCD resolution X	8,520 px
LCD resolution Y	4,320 px
XY pixel pitch X	18 µm
XY pixel pitch Y	18 µm

Connectivity4

Control display diagonal	4 in
Connectivity	USB, Wi-Fi
Listed slicers	CHITUBOX, Tango
Firmware	EL3D 4.0

Dimensions and weight4

Machine width	227 mm
Machine depth	227 mm
Machine height	443.5 mm
Net weight	6.5 kg

resin1

Release film	ACF

Technical sources: Mars 4 Ultra — documentazione ufficiale · Mars 4 Ultra — specifiche tecniche ufficiali

Undocumented specifications (21)

Enclosed as standard: Not documented
Installed toolheads / extruders: Not documented
Chamber heating: Not documented
Maximum chamber temperature: Not documented
Maximum resin heating temperature: Not documented
UV wavelength: Not documented
Automatic leveling: Not documented
Power loss recovery: Not documented
Camera: Not documented
Air filtration: Not documented
Control display: Not documented
Internal storage: Not documented
Manufacturer-listed materials: Not documented
Rated power: Not documented
Power supply: Not documented
Advertised noise: Not documented
Leveling method: Not documented
Light source: Not documented
Automatic resin feeding: Not documented
Resin vat capacity: Not documented
Advertised Z accuracy: Not documented

No published compatibility for this printer.

Related guides

General guides help identify print defects. Follow the manual for your exact model and variant for disassembly, maintenance and calibration.

Failed resin print: model detached from the build plate or stuck to the FEP
How to work out why a resin model doesn't stick to the build plate, stays stuck to the release film or splits between layers, and what to check in order: resin, temperature, leveling, settings, orientation, film.

Official documentation

Manuals and guides published by Elegoo. Links go to the manufacturer’s site; we consulted them on the date shown.

Support page

Wiki hub (troubleshooting and spare parts replacement) — English, accessed on October 5, 2026

User manual

User manual — English, accessed on October 5, 2026

Troubleshooting

Random restarts during printing — English, accessed on October 5, 2026
Abnormal motor / Z-axis noise — English, accessed on October 5, 2026
WiFi connection issues — English, accessed on October 5, 2026
UV light does not turn on — English, accessed on October 5, 2026

Parts replacement

LCD screen replacement — English, accessed on October 5, 2026
UV light replacement — English, accessed on October 5, 2026
Cooling fan replacement — English, accessed on October 5, 2026
Z-axis motor and lead screw replacement — English, accessed on October 5, 2026
Lens replacement — English, accessed on October 5, 2026

Firmware and software

Elegoo, 12 models — ELEGOO download center (firmware and software) — English, accessed on October 5, 2026
Firmware V1.3.0 — multiple languages, accessed on October 5, 2026

Safety

EU declaration of conformity (multilingual) — multiple languages, accessed on October 5, 2026

Technical specifications

Official technical specifications — English, accessed on October 5, 2026

Sources

Mars 4 Ultra — official documentation — Elegoo, accessed on October 4, 2026
Mars 4 Ultra — official technical specifications — Elegoo, accessed on October 5, 2026