EcoFlow vs Anker SOLIX for Home Backup: UPS, Ports, and Expandability
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Scope: Spec-based comparison for home backup shoppers choosing between EcoFlow and Anker SOLIX ecosystems. Focus models: EcoFlow DELTA 3 (~1 kWh expandable) vs Anker SOLIX C1000 (~1 kWh expandable). Brief notes on larger siblings (DELTA Pro-class / F2000) where official pages differ. No hands-on outage tests by Watt Weekender.
Related: apartment ~1 kWh three-way · fridge Wh sizing · LiFePO4 vs NMC
Quick decision table
| Priority | Spec lean | Why (datasheets) |
|---|---|---|
| Fastest UPS among these two | EcoFlow DELTA 3 | US page: <10 ms UPS |
| UPS still IT-ish but slower | Anker SOLIX C1000 | Official: <20 ms |
| More expansion headroom on paper | DELTA 3 | Expandable up to 5 kWh with compatible EcoFlow extra batteries |
| Double-pack expansion on Anker side | C1000 + BP1000 | Expandable to 2,112 Wh (1,056 + 1,056) |
| Higher listed solar input (base unit) | C1000 | 600 W max solar vs DELTA 3 500 W |
| More AC outlets (count) | C1000 | 6× AC vs DELTA 3 6× on US DELTA 3 listing (verify SKU — some regional pages differ) |
| Slightly lighter ~1 kWh carry | DELTA 3 | ≈12.5 kg / 27.6 lb vs C1000 ≈12.9 kg / 28.4 lb |
Head-to-head spec table
| Spec | EcoFlow DELTA 3 | Anker SOLIX C1000 |
|---|---|---|
| Capacity | 1,024 Wh | 1,056 Wh |
| Chemistry | LFP / LiFePO4 | LiFePO4 |
| Cycle life (mfr) | 4,000 to 80%+ | 3,000 to 80% |
| Rated AC output | 1,800 W | 1,800 W pure sine |
| Surge / boost | 3,600 W surge; X-Boost up to 2,200 W (US) | SurgePad up to 2,400 W (see Anker caveats) |
| UPS / EPS | <10 ms | <20 ms |
| Solar input | 500 W max (11–60 V) | 600 W max (11–60 V MPPT) |
| AC charge input | 1,500 W | up to 1,300 W UltraFast (page) |
| Expandability | Up to 5 kWh with compatible EBs | Up to 2,112 Wh with BP1000 |
| Net weight | ≈12.5 kg (27.6 lb) | 12.9 kg (28.44 lb) |
| App | EcoFlow app | Anker app (Wi-Fi / Bluetooth) |
| Official pages | us.ecoflow.com DELTA 3 | ankersolix.com C1000 |
Sources: EcoFlow US DELTA 3 product specs + footnotes; Anker SOLIX C1000 US tech specs (capacity, UPS, solar, expansion, weight).
UPS / EPS — what the milliseconds mean
Both brands advertise uninterruptible / emergency switchover for devices plugged into AC while the station is on wall power:
- <10 ms (DELTA 3) — typically fine for desktops, NAS, many routers. Still not a substitute for enterprise UPS sizing.
- <20 ms (C1000) — still in the range many consumer electronics tolerate; confirm with sensitive gear.
Setup reminder (both brands): UPS mode generally requires the station plugged into AC input with loads on AC output. Read each manual — bypass vs inverter behavior differs.
Neither figure means the battery lasts your whole outage — that is Wh vs loads. Size with fridge 24h Wh and the calculator.
Ports and what you can plug in
EcoFlow DELTA 3 (US page highlights): multiple AC outlets (US listing shows 6 AC in the specs block we reviewed), dual USB-C 100 W, USB-A fast charge, car outlet, DC5521 — good for mixed home office + fridge planning.
Anker SOLIX C1000: 6× AC, USB-C 100 W + 30 W, dual USB-A, cigarette lighter. SurgePad can allow higher-watt resistive loads up to the stated boost — Anker warns it is not for precision instruments / strict voltage-protection devices. Treat boost claims carefully for electronics.
For simultaneous loads, add nameplate watts; leave headroom under continuous rating.
Expandability (the real home-backup fork)
EcoFlow path
DELTA 3 supports extra batteries from several EcoFlow lines (DELTA 3 / DELTA 2 / DELTA 2 Max / DELTA Pro 3 EB compatibility listed on the US page) toward ~5 kWh. That matters if you want multi-day fridge+router backup without buying a whole new inverter brick.
Anker SOLIX path
C1000 doubles with BP1000 to 2,112 Wh. Clean one-extra-battery story; ceiling is lower than EcoFlow’s 5 kWh claim for this class.
Larger siblings (optional step-up)
If you need whole-circuit ambitions, look at Anker F2000 (2,048 Wh, 2,400 W, expands with BP2000 toward ~4 kWh, UPS <20 ms per Anker materials) and EcoFlow’s larger DELTA / DELTA Pro lines — compare official pages separately; do not assume C1000/DELTA 3 ports/transfer times match Pro units.
Solar recharge for outages that last
| Unit | Max solar | Idealized full-pack planning |
|---|---|---|
| DELTA 3 | 500 W | See 200 W vs 400 W charts; EcoFlow markets ~2 h at 500 W MPPT under their test conditions |
| C1000 | 600 W | Anker cites ~1.8 h full solar under their stated conditions — still weather-dependent |
Match panel voltage to each MPPT window (both roughly 11–60 V class — confirm connectors: EcoFlow DC vs Anker XT60 guidance on C1000 FAQ).
Who should buy which
- Choose DELTA 3 if you value <10 ms UPS, EcoFlow expansion toward 5 kWh, and ecosystem accessories you already own.
- Choose C1000 if you want Anker’s 600 W solar, SurgePad story for occasional high-watt heat loads (with caveats), and a straightforward double-to-~2 kWh pack.
- Unsure on chemistry longevity messaging: both are LFP; compare cycle thresholds (4,000 to 80%+ vs 3,000 to 80%) and warranties on the purchase page.
- Apartment renters: either ~1 kWh unit may cover router+lights+partial fridge — run the fridge math before assuming 24 h.
Prices
Not listed here — check EcoFlow and Anker SOLIX (and kits) at time of purchase. Anker’s affiliate program publicly lists 5% / 30-day cookie on their join page — useful later when you apply; not a reason to invent today’s street price.
Placeholder links
- EcoFlow DELTA 3: https://us.ecoflow.com/products/delta-3-portable-power-station
- Anker SOLIX C1000: https://www.ankersolix.com/products/c1000
- Anker SOLIX F2000 (larger): https://www.ankersolix.com/a1780-power-outage
Last reviewed: 2026-09-24 (MDT).