Bambu Lab P1S power consumption: watts, kWh and cost

A Bambu Lab P1S uses about 105 W while printing PLA, or 0.105 kWh an hour, which costs 1.9 cents at the US average price of $0.179 per kWh. ABS raises the average to 140 W. The printer’s rated maximum is 350 W on a 110 V supply.

How much power does the Bambu Lab P1S use?

The Bambu Lab P1S averages 105 W while printing PLA, 140 W on ABS and 135 W on PC, according to Bambu Lab’s own measurements. Its rated maximum is 350 W on a 110 V supply, and it idles at 5.8 to 6 W on Wi-Fi standby. An hour of PLA printing uses about 0.1 kWh.

State	Average watts	kWh per hour	Cost per hour at $0.179
Printing PLA	105 W	0.105	$0.019
Printing ABS	140 W	0.140	$0.025
Printing PC	135 W	0.135	$0.024
Standby, Wi-Fi on	5.8 to 6 W	0.006	$0.001
Rated maximum, 110 V	350 W	0.350	$0.063

The averages come from Bambu Lab’s wiki, which measured test prints of about 16 minutes: 0.0238 to 0.031 kWh on PLA and 0.032 to 0.043 kWh on ABS. The wiki does not give the room temperature or the part printed. The price is the U.S. Energy Information Administration’s residential average for the 12 months ending June 2026. Use your own bill’s rate if it differs.

The P1S runs about the same on ABS as on PC. The open-frame P1P, with the same build volume and rated power, averages 110 W on PLA and 170 W on ABS. Bambu Lab does not say why the enclosed P1S rises less on ABS.

What is the Bambu Lab P1S wattage?

The P1S is rated at 350 W maximum on 110 V and 1,000 W on 220 V, from a 100 to 240 VAC input. That rating is the ceiling the outlet must supply, not what the meter bills: the measured PLA average is under a third of it. Bambu Lab does not publish a measured warm-up peak, so plan circuits on the 350 W rating.

How many amps does a P1S draw at 120 V?

At its 350 W maximum the P1S draws 2.9 A at 120 V, or 3.2 A at the 110 V the rating names. While printing it averages 0.9 A on PLA and 1.2 A on ABS.

Bambu Lab also lists a power factor of 0.45 to 0.64 while printing. With a low power factor the current runs above watts divided by volts: 140 W at a power factor of 0.45 draws 2.6 A. A clamp meter will read that higher figure.

A long print is a continuous load under the National Electrical Code (NEC), so it may use only 80 percent of the breaker: 12 A on a 15 A circuit. The P1S’s 2.9 A peak uses 24 percent of that limit. The circuit capacity calculator shows how many printers fit on one circuit.

How much electricity does a P1S use per print?

Multiply the average watts by the print hours and divide by 1,000 for kWh, then multiply by your price per kWh:

kWh  = average watts × hours ÷ 1000
cost = kWh × price per kWh

4-hour PLA print: 105 W × 4 h ÷ 1000 = 0.42 kWh  →  0.42 × $0.179 = $0.075
8-hour ABS print: 140 W × 8 h ÷ 1000 = 1.12 kWh  →  1.12 × $0.179 = $0.20

A 4-hour PLA print costs about 7.5 cents. An 8-hour ABS print costs about 20 cents. The electricity cost calculator reruns this with your own rate, a smart plug reading or another material.

How much power does the P1S use on standby?

On standby the P1S draws 5.2 to 5.8 W without a network connection and 5.8 to 6 W on Wi-Fi. Left on around the clock for a 30-day month, 6 W adds up to 4.32 kWh, about 77 cents.

How much power does the AMS add?

Very little, unless it is drying filament. The P1S is sold in combos with the AMS (Automatic Material System) filament changer and the AMS 2. Bambu Lab lists these figures:

Unit	Standby	Working	Drying
AMS	0.96 W	5.78 W	not listed
AMS 2 Pro	1 W	12 W	80 W

An AMS working through a 4-hour print uses 0.023 kWh, under half a cent. Drying in an AMS 2 Pro uses 0.08 kWh an hour, about 1.4 cents.