Drawing · 25.6 × 11.8 × 14.8 in · 91.5 lb
- Capacity
- 3,072 Wh
- AC output
- 3,600 W
- Surge
- 7,200 W
- Solar input
- 2,400 W
- Weight
- 91.5 lb
Maker price$1,399.99 $1,699.99 at Anker SOLIX, checked Oct 9, 2026
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Allpowers · Large (1,500 to 3,499 Wh)
Allpowers R3500
A large unit, 3,168 Wh, 3,200 W (6,000 surge), 93 lb, $1,424 $2,099 at Allpowers, checked Oct 11, 2026 ($0.45 per Wh). By our sizing it holds a day of home backup, a night of CPAP, two nights of camping, a day in an RV, a working day in a van and a laptop and two phones.
From the maker's published figures and our own calculations; we have not tested it ourselves.
Estimated runtimehours24-hour dial
Rated capacity
3,168 Wh
3,168 Wh × 0.85 ÷ device watts. An estimate, not a measured test. Startup and connections need checking.
Drawing · 20.9 × 14.2 × 13.6 in · 93 lb
Allpowers R3500 $1,424 $2,099 at Allpowers, checked Oct 11, 2026
Capacity 3,168Wh
AC output 3,200W
Surge 6,000W
Chemistry LiFePO4
Rated cycles 3,500
Weight 93lb
Max solar input 2,000W
Price per Wh $0.45
Should you buy it?
Buy it for: a day of home backup (a full-size refrigerator, a router, phones and lights for a day); a night of CPAP (a CPAP with its humidifier for one 8-hour night); two nights of camping (camp lights, phones, a laptop and a fan for two nights); a day in an RV (a day of RV lights, TV, phones and a laptop); a working day in a van (a working day of laptop, Starlink, lights and a fan); a laptop and two phones (a laptop for six hours and two phone charges).
Choose it for the balance: $1,424 and 93 lb of the 37 large units.
Choose the Pecron F3000LFP instead if you want the most battery for the money: $0.29 per Wh against $0.45, $525 less, 29.7 lb lighter.
About 2,693 Wh reaches the AC outlets after the 0.85 loss allowance (an estimate, not a measurement). At $0.45 per watt-hour, compare its cost with the charging speed and carry weight you need. It stores 34.1 Wh per pound. We list 36 other models in its size class; the four nearest in capacity are compared below.
What it runs, and for how long
Hours = capacity × 0.85 ÷ device watts, with the draws from the device table.
| Device | Draw W | Hours | Output and surge cover it? |
|---|---|---|---|
| CPAP machine (no heated humidifier) | 45 | 59.8 | yes |
| CPAP machine (with heated humidifier) | 53 | 50.8 | yes |
| Refrigerator (full-size, ENERGY STAR, ~18 cu ft top freezer) (average draw, compressor cycling) | 41 | 65.2 | yes |
| Laptop (MacBook Air, charging) (charger rating, continuous) | 40 | 67.3 | yes |
| Wi-Fi router | 24 | 112.2 | yes |
| Starlink Mini (router built in) | 33 | 82.9 | yes |
| TV, 50-inch LED / Crystal UHD | 89 | 30.3 | yes |
| Camp LED light set (4 chainable lights) | 6 | 427.4 | yes |
"Yes" means its continuous output covers the draw and its surge rating covers the startup figure we use, by arithmetic on ratings, not a test. Startup figures: the CPAP with its humidifier, 104 W at startup, from ResMed's peak figure; the refrigerator, 1,300 W startup allowance, from a larger 27 cu ft Whirlpool's tech sheet. Your own appliance's label or manual has its own.
Sockets and size
- AC outlets: count not published, 3,200 W in total, 6,000 W surge
- Two USB-C ports, up to 100 W from one port
- USB-A ports: count not published
- 12 V outlets: count not published
How many of each socket and their limits, from the maker's spec sheet; it does not say where each one sits on the unit. It weighs 93 lb.
At a glance
How it compares with the other 36 large models, on the makers' figures. We don't boil it down to one score; see how we pick.
| What it can power | Covers every use we size. Output and surge cover all 17 devices in our list, on the startup figures we use |
|---|---|
| Price per Wh | $0.45 per Wh, 21st lowest of 37 large units |
| Portability | 93 lb, 36th lightest of 37 large units |
| Recharge speed | 2,000 W of solar input: at least 1.6 hours of full sun at that limit to refill (an ideal minimum, not clock time); 1,500 W from the wall |
| Chemistry and cycle life | LiFePO4, rated 3,500 cycles |
| Expandability | Grows to 6,336 Wh with extra batteries; 15 ms UPS switchover |
Full spec sheet
| Capacity | 3,168 Wh |
|---|---|
| Chemistry | LiFePO4 |
| Rated cycle life | 3,500 |
| Expandable | yes, to 6,336 Wh |
| Continuous AC output | 3,200 W |
|---|---|
| Surge (peak) output | 6,000 W |
| AC outlets | – |
| USB-C ports / highest output | 2 / 100 W |
| USB-A ports | – |
| 12 V outputs | – |
| Wireless charging pad | – |
| UPS / EPS switchover | 15 ms |
| Max AC input | 1,500 W |
|---|---|
| Wall recharge time | – |
| Max solar input | 2,000 W |
| Stated solar recharge time | – |
| App control | yes |
| Weight | 93 lb (42 kg) |
|---|---|
| Dimensions | 20.86 x 14.17 x 13.58 in (530 x 360 x 345 mm) |
| Wh per lb | 34.1 |
| Release year | – |
| Warranty | – |
| List price | |
|---|---|
| Store price | $1,424 |
| Price per Wh | $0.45 |
Before using the battery's cycle rating to judge value, read what LiFePO4 versus NMC means for lifespan and weight.
What the output figures mean for your devices: running and surge watts, and what a 15 ms switchover means if you use it as a UPS.
Which maker panels its solar input takes, how to wire them and the hours of sun to refill it: the R3500 solar setup.
Alternatives at this size
Listed smallest to largest by capacity; this unit is among them.
Select up to three models to compare.
Drawing · 19.1 × 11.5 × 9.5 in · 56.8 lb
- Capacity
- 3,072 Wh
- AC output
- 3,000 W
- Surge
- 6,000 W
- Solar input
- 1,200 W
- Weight
- 56.8 lb
Maker price$999 $1,799 at Dabbsson, checked Oct 11, 2026
Drawing · 24.6 × 12.9 × 15.6 in · 72.1 lb
- Capacity
- 3,072 Wh
- AC output
- 3,600 W
- Surge
- 7,200 W
- Solar input
- 800 W
- Weight
- 72.1 lb
Maker price$1,369 $1,599 at EcoFlow, checked Oct 9, 2026
Drawing · 24.1 × 12.9 × 15.6 in · 74.3 lb
- Capacity
- 3,072 Wh
- AC output
- 3,600 W
- Surge
- 7,200 W
- Solar input
- 1,600 W
- Weight
- 74.3 lb
Maker price$1,599 $2,199 at EcoFlow, checked Oct 11, 2026
Drawing · 20.9 × 14.2 × 13.6 in · 93 lb
- Capacity
- 3,168 Wh
- AC output
- 3,200 W
- Surge
- 6,000 W
- Solar input
- 2,000 W
- Weight
- 93 lb
Maker price$1,424 $2,099 at Allpowers, checked Oct 11, 2026
No models match these filters.
| Model | Wh | Output W (surge) | lb | Solar input W | Chemistry | Cycles | Price at maker $ | Price per Wh | Store |
|---|---|---|---|---|---|---|---|---|---|
| Anker SOLIX F3000 | 3,072 | 3,600 W (7,200 surge) | 91.5 | 2,400 | LiFePO4 | 4,000 to 80% | $1,399.99 | $0.46 | See it at Anker SOLIX Check price on AmazonAmazon's price may differ |
| Dabbsson 3000L | 3,072 | 3,000 W (6,000 surge) | 56.8 | 1,200 | LiFePO4 | 4,000 to 80% | $999 | $0.33 | Check price on AmazonAmazon's price may differ See it at Dabbsson |
| EcoFlow DELTA 3 Ultra | 3,072 | 3,600 W (7,200 surge) | 72.1 | 800 | LiFePO4 | – | $1,369 | $0.45 | See it at EcoFlow Check price on AmazonAmazon's price may differ |
| EcoFlow DELTA 3 Ultra Plus | 3,072 | 3,600 W (7,200 surge) | 74.3 | 1,600 | LiFePO4 | – | $1,599 | $0.52 | See it at EcoFlow Check price on AmazonAmazon's price may differ |
| Allpowers R3500 | 3,168 | 3,200 W (6,000 surge) | 93 | 2,000 | LiFePO4 | 3,500 | $1,424 | $0.45 | See it at Allpowers |
See it at Allpowers Every Allpowers model we cover Does it hold enough for your devices?
Before connecting panels, compare your array's cold-morning open-circuit voltage and short-circuit current with this model's solar-input limits in its manual.
Sources
- Specs: Allpowers product page
- Price: Allpowers product page, checked Oct 11, 2026
- How the figures and picks are made