what is the difference between the 580 and the 581H Dewalt vac?

The 581 you can plug in or use the battery feature. The 580 is just battery

what one has more power this or the DC500 18v one ? trying to see if there is any point in upgrading

I just bought this one and I have the dc500. It seems like this might have a bit more power but I'm not sure yet. Either way you will certainly get better performance from the 20v batteries on this vs the 18v battery so it may be worth the upgrade just for that.

Can it be run on 18 volt XPR batteries?

I bought one of these in August 2021 through CPO/Amazon. IT WAS NOT 18 volt XRP COMPATIBLE. DeWalt must have phased out that option in the last few years - BUMMER because I'm deep into 18v tools and batts.

Is there a carpet / upholstery attachment for shampooing?

There is not a carper/upholstery attachment for shampooing that has been approved for use with this device by the manufacturer DEWALT.

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Description

⚡ Clean Smarter, Not Harder — The Ultimate Cordless Wet-Dry Vacuum

BUILT TO ENDURE - Heavy-duty, crush-resistant 5' hose ensures durability and flexibility on the job.
COMPACT POWERHOUSE - 2-gallon tank capacity handles tough wet/dry messes like clogged pipes or spills.
UNLEASH TRUE MOBILITY - Cordless 20V MAX battery lets you clean anywhere without limits.
BREATHE EASY CLEAN DEEPER - HEPA-rated filter traps 0.3-micron dust particles for a healthier workspace.
SMART STORAGE EFFORTLESS TRANSPORT - On-board hose and accessory storage keeps everything organized and ready to go.

The DEWALT DCV580H is a cordless wet-dry vacuum powered by a 20V MAX lithium-ion battery, delivering 31 CFM suction with a 2-gallon tank. Featuring a washable HEPA filter that traps 0.3-micron dust, a heavy-duty crush-resistant hose, and onboard storage, it offers durable, flexible, and portable cleaning for professional and home use.

Specifications

Brand Name	DEWALT
Model Info	DCV580H
Product Dimensions	43.82 x 31.27 x 33.32 cm; 3.63 kg
Batteries	1 AAA batteries required.
Capacity	2 Gallons
Noise	31 dB
Part Number	DCV580H
Form Factor	Cannister
Special Features	Cordless, Durable, Easy to Carry, Easy to Use, Flexible, HEPA, Washable Filter, Wet/Dry
Color	Black, Yellow
Voltage	20 Volts
Material Type	Blend
Included Components	(1) 5' Heavy-Duty Crush Resistant Hose (1-1/4" Diameter), (1) Cordless Wet-Dry Vacuum, (1) Filter, (1) Wide Nozzle Tool Attachment, Crevice Tool
Batteries Included?	No
Batteries Required?	Yes
Battery Cell Type	Lithium Ion
Description Pile	Lithium
Average Battery Life	25 minutes
Item Weight	3.63 Kilograms

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