Two categories, on purpose. Order-online systems can ship without a Tesla-certified queue. Installer-only systems are often the better built-in appliance. Mixing them in one “best” list without saying so is how review sites mislead people.
EcoFlow sells two whole-home products. Ultra X is the cart stack on us.ecoflow.com. OCEAN Pro is Get a Quote plus a certified installer — it is not Ultra X with a bigger number. Official OCEAN Pro: energy.ecoflow.com/us/products/ocean-pro-home-solar-battery. Comparison: OCEAN Pro vs Powerwall 3.
Prices used below (each dated beside the product): Ultra X starter $7,999; Ultra X + Smart Home Panel 3 $10,999; Ultra-series extra battery $2,399 on the dedicated battery page, or $2,299 as an add-on on the Ultra X page; Anker SOLIX F3800 Plus ($2,399.99 Halloween sale / $2,999.99 list, checked 26 Oct 2026, sale ends 1 Nov 2026). Confirm on the brand page before you buy. For fuel vs kWh on a multi-day outage, start with generator vs battery vs hybrid. To match a stack to your loads, use Find my backup or the runtime calculator.
Section 25D does not apply to homeowner-owned property placed in service after December 31, 2025. Prices below are hardware list or typical installed ranges with no 30% subtracted. Sources.
12 kW / 12 kWh start. $7,999 hardware bundle; $10,999 with SHP3 (EcoFlow US, 14 Oct 2026).
6 kW / 3.84 kWh. $2,399.99 Halloween sale / $2,999.99 list (checked 26 Oct 2026, sale ends 1 Nov 2026).
9 kW inverter + B500 modules. Confirm live kit price.
13.5 kWh, 11.5 kW, 185 LRA, LFP, 10-year warranty.
| System | Path | Usable energy | Continuous power | 240V | Expandability | Starting price | Best for |
|---|---|---|---|---|---|---|---|
| Tesla Powerwall 3 | Installer | 13.5 kWh | 11.5 kW · 185 LRA | Yes (gateway) | Tesla expansion packs | Quote only | Integrated wall appliance |
| EcoFlow DELTA Pro Ultra X | Cart + electrician for SHP3 | 12 kWh start (2× ~6 kWh) | 12 kW | Yes | Same-family extras; SHP3 is Ultra X only | $7,999 / $10,999 with SHP3 | Cart whole-home stack |
| EcoFlow DELTA Pro 3 | Cart | 4 kWh | 4 kW | Yes | DP3 extras ($1,899). Do not mix with Ultra X or SHP3 | $2,799 sale / $3,299 list (checked 25 October 2026) | Expandable 240 V portable |
| Anker SOLIX F3800 Plus | Cart | 3.84 kWh | 6 kW | Yes | BP3800 extras ($1,799.99 Halloween sale / $1,999.99 list, checked 26 Oct 2026, sale ends 1 Nov 2026) | $2,399.99 Halloween sale / $2,999.99 list (checked 26 Oct 2026, sale ends 1 Nov 2026) | First 240 V portable |
| BLUETTI EP900 + B500 | Cart / DIY-leaning | ~4.46 kWh usable per B500 | 9 kW (7.6 kW off-grid with 2× B500) | Yes | 2–8 B500 typical | Confirm live kit price | High-output well / shop |
| Job | Typical hardware | Hardware snapshot | Labor / permit band | Honest total |
|---|---|---|---|---|
| Fridge, internet, CPAP (cords) | DELTA 3 or C2000 Gen 2 | $629–$899.99 Halloween sale / $1,199.99 list (checked 26 Oct 2026, sale ends 1 Nov 2026) | $0 on cords | Under $1,200 |
| Essentials + 240 V attempt | F3800 Plus or DELTA Pro 3 | $2,399.99 Halloween sale / $2,999.99 list (checked 26 Oct 2026, sale ends 1 Nov 2026) (F3800 Plus); DELTA Pro 3 $2,799 (checked 25 October 2026) | $0 on cords; $800–$2,800 if you add a transfer/inlet | F3800 Plus: $2,399.99 Halloween sale / $2,999.99 list (checked 26 Oct 2026, sale ends 1 Nov 2026), plus labor. DELTA Pro 3 side about $2,800–$5,600. |
| Selected house circuits | Portable + $399 transfer kit or inlet | Hardware + $399 | $800–$2,800 electrician | Often $3,000–$7,000 |
| Automatic whole-home (cart) | Ultra X + SHP3 | $10,999 hardware | $1,200–$3,500+ if the panel is healthy | About $12,000–$16,000 |
| Automatic whole-home (installer) | Powerwall 3 | Quote | Included in the bid | Commonly $11,000–$16,000+ |
| Size | Fridge + internet | Well (running) | Partial house | Whole-home HVAC |
|---|---|---|---|---|
| ~4 kWh (F3800 Plus / DELTA Pro 3) | ~17 hours | ~3.5 hours (start is 6–9 kW) | ~2 hours | No. Shed HVAC. |
| ~12 kWh (Ultra X starter) | ~2 days | ~10 hours running if it can start | ~6–7 hours | Short automatic backup only. Not multi-day HVAC. |
| ~20 kWh (4× B500 or Ultra extras) | ~3–4 days | ~16 hours running | ~11 hours | Still not a silent whole-home week. Plan to shed. |
Sources: tesla.com/powerwall and Tesla Energy Library; us.ecoflow.com Ultra X and Delta Pro 3 pages; ankersolix.com/products/f3800-plus; bluettipower.com EP900 materials. Installed Powerwall totals vary by panel, permit, and labor. Get local quotes.
Official packshots (arrows for more angles) and the numbers we can cite. Tesla is not pictured — their site does not publish a scrapeable packshot we can host cleanly.
6 kW / 3.84 kWh portable. Best first buy for 240 V essentials.
4 kW / 4 kWh expandable portable.
12 kW / 12 kWh starter whole-home stack.
9 kW inverter plus 4.96 kWh modules.
EcoFlow’s own page lists a standard bundle as 1 inverter + 2 batteries = 12 kW / 12 kWh for $7,999 (14 Oct 2026). Adding Smart Home Panel 3 (32 circuits, <20 ms switch) is $10,999 (14 Oct 2026). Four batteries + SHP3 is $14,399 (24 kWh; 19 Oct 2026). Extra Ultra-series batteries (6,144 Wh) list at $2,399 on the dedicated battery page, or $2,299 as an add-on on the Ultra X page (27 Sep 2026). SHP3 alone lists at $3,299 (19 Oct 2026) with a 10-year page warranty. Scale claims: up to 36 kW / 180 kWh with more inverters and packs. Surge marketing claim: up to 45 kW — treat as a manufacturer figure, not an independent test.
Warranty on that product page is described as 5 years. Some older EcoFlow lines advertised longer terms. Always read the checkout warranty, not a review written last year.
Anker’s US page lists 3,840 Wh and 6,000 W, LFP, dual-voltage, 5-year warranty. $2,399.99 Halloween sale / $2,999.99 list (checked 26 Oct 2026, sale ends 1 Nov 2026). This is not a wall-mounted Powerwall replacement. It is the unit most people should start with if the job is fridge + well pump attempt + a few 120 V circuits, and they want a refundable box on the garage floor.
View F3800 Plus on AnkerDelta Pro 3 is a portable, not Ultra X. EcoFlow lists 4,000 W, dual 120/240 V, 4 kWh expandable, from $2,799 (sale vs $3,299 list, checked 25 October 2026). Extra Delta Pro 3 batteries list around $1,899. Pairing with Smart Home Panel 2 is a different, older path than Ultra X + SHP3. Do not mix those accessory lines in your head.
View DELTA Pro 3 on EcoFlowEP900 is an inverter. B500 is a ~4.96 kWh LFP module. Two packs ≈ 9.9 kWh; four ≈ 19.8 kWh. 9 kW continuous is in well-pump / small-AC territory that a 3–4 kW portable will not hold. Retail kit prices change; confirm on Bluetti rather than any 2024 screenshot.
View EP900 kits on BluettiTesla’s published specs: 13.5 kWh, 11.5 kW continuous on-grid and backup, 185 LRA motor start, seamless transfer, 10-year warranty. US materials commonly state ~70% energy retention at year 10. Chemistry is LFP (Powerwall 2 was NMC). Integrated solar inverter; Tesla documents expansion packs. You generally cannot “add to cart” a permitted whole-home install. We include it because it is the product many readers will be quoted, and pretending EcoFlow is the same appliance would be false.
Tesla Powerwall page (informational)If you want a wall appliance, solar-ready integration, and you will get three installer quotes, start with Powerwall 3 and one non-Tesla bid (FranklinWH / Enphase / EcoFlow install). If you want something that can arrive this month and you will manage loads, start with F3800 Plus or Delta Pro 3 for essentials, or Ultra X + SHP3 if you are ready to spend Powerwall money without waiting on Tesla. If a well pump is non-negotiable, do not buy a 2–4 kW unit and hope — read the pump page. For a 2–4 day outage choice between generator, battery, and hybrid, read generator vs battery vs hybrid. Hardware ranges without the old 30% credit: cost guide. Printable prep list: checklist.
Also useful on this site
Find my backup Runtime calculator Checklist Cost guide Generator vs battery