Drawing · 6.5 × 6.3 × 9.5 in · 9.1 lb
$329.99 at Anker SOLIX
- Capacity
- 288 Wh
- Output
- 300 W (600 surge)
- Weight
- 9.1 lb
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Anker SOLIX C300 vs Anker SOLIX C300 DC
Anker sells the C300 two ways, with AC outlets or as the C300 DC without them: the choice is whether anything you plan to run has a household plug. The C300 is the cheaper energy, 6% less per watt-hour at the makers' prices, has 3 AC outlets against none and carries a 5-year warranty against 3. The C300 DC is 2.9 lb lighter: buy it for that, and the C300 for the money.
Drawing · 4.9 × 4.7 × 7.9 in · 6.2 lb
$349.99 at Anker SOLIX
- Capacity
- 288 Wh
- Output
- No AC outlet
- Weight
- 6.2 lb
Capacity
288 Wh
288 Wh
AC output
300 W
no AC outlet
Surge
600 W
Not published
Solar input
100 W
100 W
Weight
9.1 lb
6.2 lb
Anker SOLIX
Anker SOLIX C300
$329.99 at Anker SOLIX
- Capacity
- 288 Wh
- AC output
- 300 W
- Surge
- 600 W
- Solar input
- 100 W
- Weight
- 9.1 lb
Buy it if you want the most stored energy per dollar ($1.15 against $1.22 per Wh).
Anker SOLIX
Anker SOLIX C300 DC
$349.99 at Anker SOLIX
- Capacity
- 288 Wh
- AC output
- no AC outlet
- Surge
- Not published
- Solar input
- 100 W
- Weight
- 6.2 lb
Buy it if you carry it more than you run it (6.2 lb against 9.1 lb).
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Figure by figure
Compare the differences that matter for your devices; Anker SOLIX C300 leads on 5, Anker SOLIX C300 DC on 2, and the rest are equal or not comparable.
| Figure | C300 | C300 DC |
|---|---|---|
| Capacity | 288 Wh | 288 Wh |
| Output (surge) | 300 W (600 surge) | no AC outlet |
| Weight | 9.1 lb | 6.2 lb |
| Price | $329.99 at Anker SOLIX, sold out when checked Oct 11, 2026 | $349.99 at Anker SOLIX, sold out when checked Oct 11, 2026 |
| Price per Wh | $1.15 | $1.22 |
| Chemistry | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 to 80% | 3,000 to 80% |
| Max solar input | 100 W | 100 W |
| Max AC input | 330 W | – |
| Wall recharge | 50 min to 80% | – |
| Expandable | – | – |
| UPS switchover | 10 ms | – |
| AC outlets | 3 | 0 |
| USB-C ports | 3 | 4 |
| Warranty | 5 years | 3 years |
| Dimensions | 6.5 x 6.3 x 9.5 in | 4.9 x 4.7 x 7.9 in |
Cycle counts are highlighted only when both makers rate them to the same remaining capacity. A full recharge is not ranked against a charge to 80%. Missing figures never count as an advantage. These are manufacturer ratings; matching endpoints do not prove identical test conditions.
Rated cycles: C300, 3,000 to 80%; C300 DC, 3,000 to 80%.
How the comparison is worked out
| Figure | C300 | C300 DC | Meaning |
|---|---|---|---|
| Capacity | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| Output (surge) | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| Weight | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| Price | C300 price source · checked Oct 11, 2026 | C300 DC price source · checked Oct 11, 2026 | As the maker states it; a dash where not published |
| Price per Wh | C300 price source · checked Oct 11, 2026 | C300 DC price source · checked Oct 11, 2026 | Price ÷ rated Wh; calculated, not measured |
| Chemistry | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| Rated cycles | C300 spec sheet | C300 DC spec sheet | Stated cycles and remaining-capacity percentage; conditions may differ |
| Max solar input | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| Max AC input | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| Wall recharge | C300 spec sheet | C300 DC spec sheet | Keep the full or 80% charge endpoint |
| Expandable | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| UPS switchover | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| AC outlets | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| USB-C ports | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| Warranty | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
| Dimensions | C300 spec sheet | C300 DC spec sheet | As the maker states it; a dash where not published |
Estimated AC energy = rated Wh × 0.85. Runtime = estimated AC energy ÷ load W, with no reserve. Capacity and weight differences use the displayed figures; price per Wh uses each model's own price and the day it was checked. The device draws are in the watt-hour calculator.
- Capacity: C300 DC minus C300 = 0 Wh (0% of the C300 figure).
- Carry weight: C300 DC minus C300 = -2.9 lb (-31.9% of the C300 figure).
- Price per Wh: C300 DC minus C300 = 0.07 USD/Wh (6.1% of the C300 figure).
Will it run your gear?
Check whether each unit has enough battery and output for the devices you want to run.
| Use | Needs | C300 | C300 DC |
|---|---|---|---|
| a day of home backup (a full-size refrigerator, a router, phones and lights for a day) | 2,323 Wh, 161 W running, 1,351 W startup | no: too little capacity | no: too little capacity |
| a night of CPAP (a CPAP with its humidifier for one 8-hour night) | 599 Wh, 53 W running, 104 W startup | no: too little capacity | no: too little capacity |
| two nights of camping (camp lights, phones, a laptop and a fan for two nights) | 2,066 Wh, 157 W running, 157 W startup | no: too little capacity | no: too little capacity |
| a day in an RV (a day of RV lights, TV, phones and a laptop) | 648 Wh, 156 W running, 156 W startup | no: too little capacity | no: too little capacity |
| a working day in a van (a working day of laptop, Starlink, lights and a fan) | 1,674 Wh, 189 W running, 189 W startup | no: too little capacity | no: too little capacity |
| a laptop and two phones (a laptop for six hours and two phone charges) | 396 Wh, 60 W running, 60 W startup | no: too little capacity | no: too little capacity |
Runtime by device
Hours = capacity × 0.85 ÷ device watts, with the draws from the device table; "Start" says whether the output and surge ratings cover the startup figure we use for each device (the refrigerator, 1,300 W startup allowance, from a larger 27 cu ft Whirlpool's tech sheet), so a "yes" there means likely, not certain, to start yours.
| Device | Draw W | C300 h | Start | C300 DC h | Start |
|---|---|---|---|---|---|
| CPAP machine (with heated humidifier) | 53 | 4.6 | yes | 4.6 | no |
| Refrigerator (full-size, ENERGY STAR, ~18 cu ft top freezer) (average draw) | 41 | 5.9 | no | 5.9 | no |
| Laptop (MacBook Air, charging) | 40 | 6.1 | yes | 6.1 | no |
| Wi-Fi router | 24 | 10.2 | yes | 10.2 | no |
| Starlink Mini (router built in) | 33 | 7.5 | yes | 7.5 | no |
| TV, 50-inch LED / Crystal UHD | 89 | 2.8 | yes | 2.8 | no |
| Space heater, 1500 W | 1,500 | 0.2 | no | 0.2 | no |
Buy the C300 if…
- you want the most stored energy per dollar ($1.15 against $1.22 per Wh)
- the $20 difference matters more than the specs
- anything you plan to run has a household plug (the C300 DC has no AC outlet)
- it will sit between the wall and a refrigerator or router (maker-stated 10 ms switchover; the other publishes none)
- the longer warranty matters to you (5 years against 3 years)
Buy the C300 DC if…
- you carry it more than you run it (6.2 lb against 9.1 lb)
More Anker SOLIX models. Every model we list: all 116 in one table. Your own devices: the watt-hour calculator.
Questions buyers ask
Which is better for power outages, the C300 or the C300 DC?
Anker SOLIX C300 states a 10 ms switchover, so it can sit between the wall and a fridge or router and take over when the power cuts, once the device is in an outlet the manual gives the backup to and any AC timeout is off (for a CPAP or a computer, check that device rides through the switch); Anker SOLIX C300 DC publishes no switchover figure. Capacity: 288 Wh each. Check your appliance's startup watts against the surge figures in the table.
Which is cheaper per watt-hour?
C300 at $1.15 per Wh against $1.22. This compares purchase price with rated capacity, not lifetime delivered energy.
Can either run a window air conditioner?
Only if the air conditioner's running watts stay under the AC output (300 W on the C300, 0 W on the C300 DC) and its start fits the surge figures in the table: read both on the air conditioner's label or in its manual, and test it before you rely on it. For the hours, multiply the rated Wh by 0.85 for inverter losses and divide by the running watts. A unit whose label says 500 W, for example, would run about 0.5 hours on the C300 and about 0.5 hours on the C300 DC on a full charge, if its compressor ran without a break.