Elegoo Neptune 4 Max

  • Scores 7 out of 10, #46 of 51 current FDM printers.
  • 84.7 L of build space (420×420×480 mm), 3.9× the 21.6 L average.
  • Best at value: 9/10, against an average of 8.5.
  • The catch: Open frame at this scale means ABS warping will ruin prints without serious prep.

Specs from the PrintPick catalog, checked 2026-09-29. Scores are PrintPick ratings out of 10.

By Shadman Rahman · Prices checked

Elegoo Neptune 4 Max
Illustration generated with AI from the manufacturer's published design. Not a photograph.
Best Value

At a glance

Elegoo · FDM (filament)

Score
7/10
Rank
#46/51
Build
84.7 L
Speed
500 mm/s
Layer
0.05 mm

The store sets the current price. Check it there before you buy.

The verdict

Buy the Neptune 4 Max. 7/10, #46 of 51 FDM printers.

The Neptune 4 Max wins on value for large-format Klipper printing. The Artillery Sidewinder X4 is the cheaper competitor; the extra cost buys you better software support and a slightly larger build volume.

Why buy the Neptune 4 Max

  • #2 of 51Top 2 FDM printers for build space84.7 L vs 21.6 L average
  • #10 of 51Top 10 FDM printers for value9/10 vs 8.5/10 average
  • #38 of 51Top 38 FDM printers for reliability7/10 vs 8.1/10 average

The numbers behind it

Right side is the average of the 51 current FDM printers we track. Teal wins the row.

Neptune 4 MaxElegoo · FDM
vs
Average51 FDM printers
Neptune 4 Max and Average of 51 compared: specs
Neptune 4 MaxSpecAverage of 51
84.7 L (wins)Build volume21.6 L
500 mm/s (wins)Top speed476 mm/s
0.05 mm (wins)Finest layer0.054 mm
22.0 kgWeight14.7 kg

Scores out of 10

Neptune 4 Max and Average of 51 compared: PrintPick scores out of 10
Neptune 4 MaxSpecAverage of 51
9 (wins)Value8.5
5Beginner7.4 (wins)
7Print quality8.4 (wins)
7Speed7.9 (wins)
7Reliability8.1 (wins)
7Overall8.1 (wins)

Build space, front view, to one scale

  • 420 × 420 × 480 mmNeptune 4 Max
  • 450 × 450 × 470 mmCR-M4, largest current FDM

What owners say

  • 420mm Klipper for [this price]. Elegoo just won the large format budget race.
    r/3Dprinting
  • Printed a full cosplay breastplate in one go. Absolutely remarkable value.
    r/cosplay

Pros & Cons

Pros

  • +420x420x480mm with Klipper: the price-to-volume ratio is hard to beat
  • +Direct drive on a bed this large is unusual and useful for flexible materials
  • +Klipper gives you full control to tune speed and acceleration for the mass of this bed
  • +Prints full armor breastplates in a single run

Cons

  • −Open frame at this scale means ABS warping will ruin prints without serious prep
  • −The sheer footprint means a dedicated table minimum; don't try to share desk space
  • −Slower effective speeds on a 420mm heated bed: physics wins eventually

Full specs

Build volume420 × 420 × 480 mm
Layer resolution0.05 to 0.35 mm
Top speed500 mm/s
Weight22 kg
TypeFDM (filament)

Features

  • Klipper firmware
  • Auto bed leveling
  • Direct drive
  • PEI build plate
  • 420x420x480mm build

Buy these with it

A printer does nothing without these. Grab them in the same order.

Compare the Neptune 4 Max with (13)

Frequently Asked Questions

What is the build volume of the Elegoo Neptune 4 Max?

The Elegoo Neptune 4 Max has a build volume of 420 x 420 x 480 mm.

Is the Elegoo Neptune 4 Max good for beginners?

The Elegoo Neptune 4 Max scores 5/10 for beginner-friendliness. It's suitable for beginners with some patience.

What are the pros and cons of the Elegoo Neptune 4 Max?

Pros: 420x420x480mm with Klipper: the price-to-volume ratio is hard to beat. Direct drive on a bed this large is unusual and useful for flexible materials. Klipper gives you full control to tune speed and acceleration for the mass of this bed. Prints full armor breastplates in a single run. Cons: Open frame at this scale means ABS warping will ruin prints without serious prep. The sheer footprint means a dedicated table minimum; don't try to share desk space. Slower effective speeds on a 420mm heated bed: physics wins eventually.

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