For the largest Neptune 4 format
Elegoo Neptune 4 Max
An open-frame FDM printer with a 420 × 420 × 480 mm nominal build volume, Klipper firmware pre-installed, and Wi-Fi connectivity per Elegoo.
In short The Elegoo Neptune 4 Max is an open-frame filament (FDM) 3D printer with a 420 × 420 × 480 mm (16.5 × 16.5 × 18.9 in) build volume. Elegoo claims a 500 mm/s top speed, a 300 °C (572 °F) nozzle and a 85 °C (185 °F) bed; the printer measures 658 × 632 × 740 mm (25.9 × 24.9 × 29.1 in) and weighs 18.1 kg (39.9 lb).
Documentary analysis · Not personally tested
FDM · Open frameWhy consider it?
The largest volume in the Neptune 4 lineup at 420 × 420 × 480 mm, X/Y acceleration sensors, 121-point leveling, and Wi-Fi, USB, and LAN connectivity per Elegoo.
What to verify
Advertised maximum acceleration drops to 8,000 mm/s² at this size; net weight of 18.1 kg and an open chassis that needs a separate enclosure for ABS and ASA.
Elegoo Neptune 4 Max specifications
- Technology
- Filament (FDM)
- Build volume
- 420 × 420 × 480 mm (16.5 × 16.5 × 18.9 in)
- Printer dimensions
- 658 × 632 × 740 mm (25.9 × 24.9 × 29.1 in)
- Weight
- 18.1 kg (39.9 lb)
- Enclosure
- Open frame
- Claimed top speed
- 500 mm/s
- Max nozzle temperature
- 300 °C (572 °F)
- Max bed temperature
- 85 °C (185 °F)
- Multicolor
- No multicolor system; this model stays monochrome like the rest of the Neptune 4 lineup.
- Materials
- PLA, TPU, PETG, ABS, ASA, and nylon with a nozzle advertised up to 300°C; ABS and ASA are recommended with an enclosure sold as an accessory.
- Connectivity
- Wi-Fi, USB
- Listed features
- Auto bed leveling, filament runout sensor
How much space does it need?
The Elegoo Neptune 4 Max measures 658 × 632 × 740 mm (25.9 × 24.9 × 29.1 in) for a 420 × 420 × 480 mm (16.5 × 16.5 × 18.9 in) build volume: the dashed box is the printer, the solid cube the largest theoretical part, about 28% of the machine’s volume. Add room for the spool or multicolor unit, cables and ventilation.
Source: official Elegoo pages (fr.elegoo.com), checked September 28, 2026. Manufacturer claims, not our measurements. Build volume is nominal: orientation, supports and reserved zones can reduce the usable space.
Which projects is it for?
The Neptune 4 Max pushes the lineup's nominal volume to 420 × 420 × 480 mm per Elegoo, the largest format in the Neptune 4 family. It targets bulky parts, multiple batches, and workshops that want to stay on Klipper without jumping to an industrial format like the OrangeStorm Giga.
The advertised top speed stays at 500 mm/s, but maximum acceleration drops to 8,000 mm/s², versus 20,000 mm/s² on the base Neptune 4, a logical trade-off given the extra mass of the bed and gantry in motion.
Materials and setup
The nozzle advertises up to 300°C and compatibility with PLA, TPU, PETG, ABS, ASA, and nylon per Elegoo, with the same dual-gear direct extruder and titanium-alloy throat as the rest of the lineup.
The heated bed advertises a maximum temperature of 85°C at 25°C ambient, lower than on the other Neptune 4 models, worth watching for materials that need strong adhesion over a large area.
What the bundle includes or not
The box includes the base unit, gantry, spool holder arm, touch screen, and spiral cable per Elegoo's "What's In Box" list, with further items not detailed, 11 and up in total. The advertised net weight is 18.1 kg and gross weight 21.8 kg, worth planning for when it comes to transport and setup.
Like the Neptune 4 Plus, this version adds Wi-Fi alongside USB and LAN per Elegoo, but still ships without a built-in camera.
Alternatives to compare
For a more compact footprint on the same architecture, the Neptune 4 Plus offers 320 × 320 × 385 mm at a lower weight. For an even larger, production-oriented format, the OrangeStorm Giga reaches 800 × 800 × 1000 mm on a different architecture.
The functional parts guide helps judge whether this size is actually needed, and the beginner's buying guide places the Max among the other Neptune 4 models.
Similar printers to compare
Sources and limits
- Source: official Elegoo pages (fr.elegoo.com), checked September 28, 2026. Manufacturer claims, not our measurements.
- How we assess specifications
We have not measured noise, real printing speed, accuracy or reliability, so none of these is rated here.