Epson EcoTank ET-4850 Review: The Office Supertank, Cons and All

Updated June 18, 2026

Print Speed Up to 15.5 ppm black / 8.5 ppm colour

Functions Print, Scan, Copy, Fax with ADF

Connectivity Wi-Fi, Ethernet, AirPrint, Epson Smart Panel

Ink System Cartridge-free refillable tanks

Two-Sided Printing Auto 2-sided printing

Our Verdict

The full-function supertank for SOHO buyers who want refill economics without dropping scan, copy and fax — worth its premium over the ET-4800 only if you wire it over Ethernet and actually use the office features.

Best for: Home offices that use the ADF, fax and Ethernet, not just print

Configuration

FAX/ADF/PRINT/COPY/SCAN

Pattern Name

Printer

Style Name

ET-4850-WET-4850-B

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Overview

The EcoTank that went to work

Most supertanks are built to print. The Epson EcoTank ET-4850 Wireless is built to run an office. Epson's listing puts the difference in one line — a Cartridge-Free Supertank with scanner, copier, fax, ADF and Ethernet. That document-machine stack is what separates it from the cheaper EcoTanks, and what you are really paying the price step for.

The lens this site puts on every machine is the one Epson's page buries: not the sticker, but the cartridge-versus-tank math of what it actually costs to own over time. On running cost the ET-4850 is firmly pole-two ink — dearer to buy, far cheaper to feed — so the spend only makes sense for a household that prints enough to bank the savings.

Across the 13 owner reviews, satisfaction reads as plain rather than surprising. First-time Epson buyers land on it and stay. There is no hidden flaw and no unexpected delight — the story is competent office function, and the verdict turns on one question: do you use that function, or just pay for it?

What the spec sheet buys

The numbers are office-grade, not home-grade. Epson rates it to print Prints up to 15.5 pages per minute in black and 8.5 in colour — quick enough for real document runs — and to print Prints at a 4800 x 1200 resolution for crisp text. It also adds Auto 2-sided printing helps save paper, the kind of feature the budget EcoTanks skip.

Connectivity is where it pulls ahead of the cheap models. It Offers mobile printing options through the Epson Smart Panel app, AirPrint and Mopria — and, critically, a wired Ethernet jack. Epson's own ET-4850 specifications confirm the office configuration. The connectivity is also the source of the most-repeated complaint, which the performance section gets to next — we lay out the full scoring logic in our comparison criteria for inkjet printers.

Performance & Real-World Testing

The Wi-Fi is the weak link

Here's the thing: the single sharpest complaint in the owner record is not print quality. It's the wireless. One owner logged jobs failing 9 out of 10 times, the print job fails with no connection to the printer. That is the kind of failure that turns a deadline into a support ticket, and it shows up across the EcoTank line, not just this model.

There is a fix, and it is the reason to buy this configuration over a Wi-Fi-only EcoTank. Wire it. Owners highlight Ethernet as a reliability win — one ran the ET-4850 over the Ethernet jack, tucked in a closet beside the router, and printed without the connection dropping. A network jack the budget models lack is exactly what makes the office EcoTank worth its premium — but only if you actually plug it in.

The ADF is slower than the brochure

The document feeder is the second feature you pay for, and the second one owners flag. One frustrated owner found it takes forever to Scan (and jams more frequently than it scans). Another caught its hard limit: it it doesn't scan doublesided and also had some issues pulling not-perfect sized receipts. A single-sided feeder that snags on odd paper is fine for light office batches, frustrating for heavy ones.

Speed in general runs behind the spec. One buyer flatly reported that It prints slower than specified — the gap between the 15.5-ppm rating and real-world throughput that page-yield and speed claims usually hide. Consumer Reports' inkjet reliability and running-cost testing finds the same pattern across the category: rated speeds are best-case, not typical-case.

Buy it for documents, not photos

The colour is the third honest limit. One owner is blunt: The color on the ET series is very muted. Another puts it plainly — This printer isn't really designed for photo printing anyways. For anything past plain documents and basic graphics, a dedicated photo supertank handles saturation far better; we grade the document-versus-photo fork in our inkjet printers evidence hub.

Value Analysis

Dear to buy, cheap to feed

This is where the supertank earns back its sticker. The ET-4850 lists far higher than a cartridge office printer, but the ink is where the math flips. A genuine Epson refill set runs roughly the price of a takeaway and includes a 127 ml black bottle — the OEM set is a fraction of what a year of cartridge sets costs. The supertank front-loads the cost into the box and pays it back in bottle ink.

Independent testing backs the gap. RTINGS' cost-per-print and page-yield testing puts cartridge cost-per-page many times higher than bottle ink, and the cartridge office printers the ET-4850 competes with are the dearest of all to refill. A supertank is the reverse: high sticker, flat running cost. Print in volume and the lines cross fast; print rarely and the premium sits wasted — the fork we run across the catalog in our type-versus-type tradeoffs analysis.

The first-refill gotcha

One failure mode is worth flagging before you fill it. After a first refill, one owner's machine printed everything printed in shades of blue, despite having refilled all colors — an air-lock or priming fault in the tank lines, not a defect in the ink. It is usually clearable with a head clean and a few test pages, but budget the patience the first time you top the tanks up.

What to Expect Over Time

Living with it: idle time, lifespan and the feed

Three things shape life with the ET-4850 past the first month: idleness, service life, and the paper path.

Idleness first, because every inkjet has one failure mode a laser doesn't: liquid ink dries in the nozzles when the machine sits unused, and it spends ink on cleaning cycles to clear it. Owners advise you you want to avoid ink drying in the pipes if you print infrequently — run it weekly and the clog risk stays low; leave it dark for a month and the clog you meet is the morning you need a contract printed. We track that idle-clog risk in our safety and known-risks guidance.

Plan for a service life, not a decade

Service life is the honest planning figure. One long-term owner reckons most ecotanks in the 4000 series and lower seem to have a life expectancy of about two and a half to three years. That is not a hard limit, and regular printing helps, but it is a realistic number to amortise the running-cost saving against — not the ten years a tank machine's economics might tempt you to assume.

The paper path is the third thread. Past heavy use, one owner found that After so many prints the paper from the bottom tray will stop feeding through the printer and jam every time. It is not universal, but for an office machine bought to run volume, a tray that tires is exactly the wear point to watch. For pure document duty, several owners go further — for homeschooling purposes a laser printer is far superior. The ET-4850 wins when you need its colour, scan, copy and fax in one box; a mono laser wins when you only print black text.