Anker and EcoFlow Built the Same Battery. One Put It on Wheels for $699 Less.

We assume 85 per cent of rated capacity reaches the outlet after inverter losses, which leaves about 4,270 Wh in the S5000 and 4,265 Wh in a TITAN. At steady loads, one unit of either runs:

Our arithmetic: rated capacity × 85% ÷ load. Neither maker has published a measured usable figure.

The 10 kW caveat. EcoFlow quotes the Plus at 10,000 W. Its label says 7,200 W for discharge; the extra 2,800 W needs solar or grid power flowing in at the same moment, which EcoFlow calls PV Boost. In a blackout at night, the Plus is a 7,200 W machine, the same as the base TITAN 5000. Compare it with the S5000 on that figure, not on 10 kW.

The other efficiency is keeping energy out of the battery. Every watt-hour that passes through the pack pays a round trip, and the usual cost of one is 10 to 15 per cent. EcoFlow’s PV Boost and X-Fusion 2.0 are built around avoiding it: solar feeds the house directly, up to 8,000 W of it on the Plus, and the battery covers only the gap. Anker’s answer is bypass mode, which passes 4,500 W of wall power straight through, with solar capped at 3,000 W. In a long daytime outage with panels on the roof, the TITAN Plus moves more of the load around its battery.

The ecosystems differ in kind. EcoFlow’s is the panel: the Smart Home Panel 10 ships pre-wired for 10 circuits, AC-couples to existing rooftop solar through a CT sensor, and OASIS 3.0 forecasts solar three days ahead and charges off-peak, though EcoFlow marks that software as an app subscription. Anker’s is the unit: the UPS switch lives on board, the bypass needs no electrician, and the 400 V bus is the growth path. One sells you a home energy system; the other sells you a very large battery that behaves like an appliance.

Anker’s page, read 2026-10-09; EcoFlow’s US store, read 2026-10-19. Per kWh is our arithmetic on the rated capacity.

Read the table two ways. On the cheapest unit from each maker, the two are 99 cents apart, $498 against $498 per kilowatt-hour, and Anker’s has 240 V, wheels and a published surge rating while EcoFlow’s has none of the three. On the cheapest unit with 240 V from each maker, the S5000 at its launch price is $699 under the base TITAN 5000, and the TITAN gives 2,700 W more output for it.

Two cautions on the figures themselves. Anker’s $2,499.99 is a launch price for buyers who sign up by October 26 and buy from October 27; its list price is $3,599.99, which would put it $401 above the base TITAN. EcoFlow’s figures are “from” prices on a store where nothing can be bought yet; EcoFlow says the exact configuration prices post November 3, and its $50 reservation takes 5 per cent off a TITAN bought by December 31.

What can be said: both systems grow one pack at a time, and both makers say the extra battery matches the base unit’s capacity. EcoFlow says its remaining pricing details post on November 3; Anker has given no date for the BP5000. We will add both figures to the trackers the day they appear, and the side-by-side page reads the prices twice a day once they exist.

• Usable capacity. Both makers rate the pack; neither has published what reaches an outlet. Our 85 per cent is an assumption, and the first bench test replaces it.
• Switchover, as measured. Anker’s 10 ms is the figure on its page; EcoFlow’s under 20 ms is through the Smart Home Panel 10. Nobody has timed either with a scope yet.
• Runtime on a real refrigerator or well pump, which is what the 85 per cent arithmetic above stands in for.
• A surge rating for any TITAN. Anker publishes 8,000 W; EcoFlow has not published a figure, so whether a well pump starts on a TITAN is unknown.
• A cycle rating for the TITAN. Anker rates the S5000 at 6,000 cycles to 80 per cent of capacity; EcoFlow names the chemistry and no count.
• The TITAN’s idle draw. Anker publishes 8.8 W with 120 V output on; EcoFlow publishes none, and it is the figure that decides how much of a multi-day outage the inverter itself eats.
• Round-trip efficiency of either, and whether a 16 V pack runs hot at 4,500 W. The TITAN’s voltage advantage is physics; its size is unmeasured.
• The price of either expansion battery, and so the price of any system bigger than one pack.

Neither unit has shipped, so every figure on this page is a maker’s rating or our arithmetic on one. Nothing here is a measurement.

Our pick for most homes is the S5000, and we’d sign up before October 26. Nothing EcoFlow posts on November 3 changes the three things that won it: 240 V at the lowest price on this page, a switchover that lives in the unit rather than in a wall panel, and a cabinet one person can move. What bothers us on EcoFlow’s side is not the price but the blanks: no surge figure, no cycle rating, no idle draw, for a machine that costs $699 more at 240 V. The TITAN earns the wait when 4,500 W is genuinely not enough, and for that house it is the better machine.

The calendar is the problem. Anker’s sign-up closes on October 26 and its sales open on October 27; EcoFlow’s reservations run to November 2 and its sales and final prices arrive on November 3. That is 8 days in which you have to hold Anker’s price without knowing EcoFlow’s. Signing up on Anker’s page costs nothing, and EcoFlow’s $50 comes back if you buy no TITAN by December 31, so keeping both doors open until November 3 costs $50 at most. What Anker has not said is how long after October 27 the launch price holds for someone who signed up; read its terms before you count on it surviving to November 3.

Sign up for the S5000 if 4,500 W covers your biggest hour, you want 240 V at the lowest price on this page, you want the switchover without a panel install, or you want a unit one person can roll into place. You also get a published surge figure and a published cycle rating, which EcoFlow has not given you.

Wait for the TITAN 5000 if you need more than 4,500 W at once, two large 240 V loads at the same time, say, or if the unit will live behind a wall panel anyway and 4,000 to 8,000 W of solar is part of the plan. You pay $699 more at today’s figures for 2,700 W more inverter, and you will not know the exact price until November 3.

The Classic is the hard case. It costs 99 cents less than the S5000’s launch price and gives you less: no 240 V, 500 W less output, 5.5 lb more and no wheels. Choose it only for a house with no 240 V loads that wants EcoFlow’s panel and software.

Whichever way you lean, do not decide on the 30 kWh picture yet. Nobody can price it. Decide on the one unit you would buy first, and read the pack prices when they land.

The spec sheets, graded line by line, are on our S5000 tracker and TITAN 5000 tracker; our TITAN launch analysis sorts out the three EcoFlow models. The side-by-side pages, which check both prices twice a day once sales open: TITAN 5000 vs S5000, TITAN 5000 Classic vs S5000 and TITAN 5000 Plus vs S5000.

We may earn a commission if you buy a TITAN through that link; we have no arrangement with Anker. Neither changes what we report. How we make money.

Anker’s figures are from its S5000 product page and the rating label it filed with the FCC; EcoFlow’s are from its launch announcement, its US store and the rating labels in its own filings. The S5000 price is the launch price Anker’s page states for sign-ups between October 9 and October 26; the TITAN prices are the “from” prices EcoFlow’s store printed on 2026-10-19, with checkout closed and final configuration prices promised for November 3. Per-kWh figures, runtimes, weight ratios and gaps are our arithmetic on those figures, and the runtime rows assume 85 per cent of rated capacity reaches the outlet. Where a maker has published nothing, the line says so.

1. [1]Anker SOLIX, “Anker SOLIX S5000 product page: specifications, the October 9–26 sign-up that locks in the $2,499.99 launch price, and the October 27 on-sale date”, 2026-10-09.
2. [2]Anker Innovations, regulatory filing, “Rating label for the Anker SOLIX S5000, model AS510, and the BP5000 expansion battery”, 2026-09-15.
3. [3]EcoFlow, “EcoFlow’s launch announcement for the TITAN 5000 line, October 13, 2026”, 2026-10-13.
4. [4]EcoFlow US store, “The TITAN Series “from” prices, the reservation window to November 2 and sales from November 3”, 2026-10-19.
5. [5]EcoFlow, regulatory filing, “Rating labels for the TITAN 5000, TITAN 5000 Plus and TITAN 5000 Classic (models EF-TT-5-G1, EF-TT-5P-G1, EF-TT-5C-G1)”, 2026-07-20.