Head-to-head test
Anker SOLIX C300 vs Anker SOLIX C300 DC
The C300 DC is the C300 with the inverter taken out. That one removed part makes it lighter, cheaper to buy and cheaper to own, and it takes away every wall outlet and the UPS mode with it.
Black Friday Β· 23 days out
Prices to beat:SOLIX C300 $270SOLIX C300 DC $200
The lowest we have recorded for each. We have never seen the SOLIX C300 DC discounted, so any real cut on it would be a first.
Full profiles: Anker SOLIX C300 β Β· Anker SOLIX C300 DC β
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
Spec deltas
Wennyβs take
Portable Power Tester
I spent seven years reading contracts for the one clause that changes the deal. On these two it's a single line of the spec sheet: AC outlets. The C300 has three. The C300 DC has none. Nearly everything else matches, down to the 288Wh battery and the two 140W USB-C ports.
Taking the inverter out does several things at once. An inverter is the part that turns battery power into wall-socket power. Without it, the DC weighs 2.93 lbs less and costs $130 less. It also loses the UPS mode, the C300's ability to sit between the wall and a router and take over when the power drops. Its warranty is two years shorter, too.
So the real question is what's in your bag. My trail kit is a camera, a laptop and a phone, and all three charge over USB-C. For that kit the DC does the job and leaves room for one more lens. A fan with a wall plug, or a router back home, moves the answer to the C300.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
Typical price
It buys the C300's inverter: three AC outlets, a 600W surge and a UPS rating of no worse than 10ms. The DC lists no AC outlets and no switchover.
Both units hold 288Wh with the same 3,000-cycle rating and the same dual 140W USB-C portsThe C300 costs $330 and the C300 DC costs $200, a $130 gap
Why it mattersComparing these two on price per watt-hour misses what the money buys. Count the wall plugs on your list first.
A switchover rating only means something on a unit with an inverter to switch to. Reviewers call the C300's 10ms rating unusual at this size and priceA3.
Anker's own listing shows zero AC outlets and marks surge peak not applicable on the C300 DCThe standard C300's 10ms UPS switchover is called legitimately unique in its size and price class by reviewersA3
Why it mattersIf the job is keeping a router or modem up through a flicker, the C300 is the only candidate here. It covers short outages and won't carry a long one.
Reviewers trace the DC's low weight to the missing inverterB1. The same removed part explains the lower price and the missing UPS mode.
The C300 weighs 9.1 lbs and the C300 DC weighs 6.17 lbsReviewers describe the DC as kept very light specifically because it ditches the AC inverterB1
Why it mattersIf you only charge phones and laptops, the lower weight and the lower price come as one package. You don't have to trade one for the other.
cost / lifetime kWh
The DC wins this math cleanly, $0.23 against $0.38. Cost per kWh counts energy delivered. It has no column for a wall plug you don't have.
The engine prices the C300 DC at $0.23 per lifetime kWh against the C300's $0.38Both units deliver an identical 864 total lifetime kWh, from the same capacity and cycle rating
Why it mattersIf every device you own is USB or 12V, the DC is the better buy on our numbers. If a lamp or a router is in the picture, this math stops applying to you.
The specific dimensions that decide these two units β everything else is a tie.
What the Specs Don't Tell You
Selected because: The no-AC card and the UPS card are the two that decide this pair.
Two cards decide this pair. The first is the DC's. Its 300W is a total across its USB and 12V ports, not an inverter rating, so anything with a wall plug never plugs in, at any wattage. The second is the C300's UPS mode, rated no worse than 10ms, which lets it sit between the wall and a router.
The other two cards are smaller. The C300 carries five years of warranty to the DC's three. The C300 publishes a 25dB noise figure and the DC publishes none. A missing figure says nothing about whether the DC is louder. It leaves nothing to compare.
Lifetime Value
Selected because: Same capacity and cycle rating, so cost per kWh is price arithmetic, and it favours the DC.
cost / lifetime kWh
Both units are rated for 3,000 cycles on the same 288Wh capacity, so both deliver the same 864 lifetime kWh. That makes the cost comparison clean. The DC comes to $0.23 per lifetime kWh and the C300 to $0.38, and the price gap explains all of it.
This is the DC's cleanest win on the page. It holds only if the AC outlets were never going to get used. Per-kWh math can't price a wall plug you don't have.
Portability & Form Factor
Selected because: The weight gap traces to the same removed part as the price gap.
weight
Neither is heavy, and both ride comfortably in one hand. If I were hauling one up the Dipsea steps, I'd feel the C300's extra 2.93 lbs by the top. How much that matters depends on what the outlets are worth to you.
Reviewers credit the DC's low weight to the missing inverterB1. The lighter unit is lighter because it ships without the part the C300 charges $130 for.
Your Life, Your Pick
Selected because: Most scenarios fail on capacity for both, and on outlets for the DC.
Most of our scenarios are too big for a box this size, and they fail both units. The weekend, the blackout, the workday and the van-life day all ask for far more energy than either holds. On the DC they fail twice, because those lists include things with wall plugs and the DC has nowhere to plug them in.
The CPAP night comes close on both, at about 76% covered. The afternoon off the grid is the job these two are built for, and both finish it at 41% used. The tailgate shows the inverter's limit. The C300 starts the 400W peak on its 600W surge and then can't hold it on 300W continuous.
Strengths & trade-offs
Anker SOLIX C300
Strengths
- +Longer warranty
Trade-offs
- βSubstantially more expensive (+$130) than the SOLIX C300 DC.
Anker SOLIX C300 DC
Strengths
- +Costs $130 less
- +Lighter by 2.9 lb
Trade-offs
- βNo major technical downsides compared to rival.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on seven real-world scenarios. Here's which unit survives your actual life.
SCN-01 Β· 2 nights Β· needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
The SOLIX C300 DC has no AC outlets, so the led lights and box fan in this scenario never plug in β it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind of unit for the job rather than a close call. The SOLIX C300 doesn't have the energy either β 245Wh usable against 2,100Wh, 1,855Wh short β so neither route works.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger 15WΓ6h Β· LED Lights 40WΓ8h Β· Box Fan 75WΓ14h Β· CPAP Machine 40WΓ16h
SCN-02 Β· 8 hours Β· needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
The SOLIX C300 DC has no AC outlets, so the fridge, router + modem and the rest in this scenario never plug in β it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind of unit for the job rather than a close call. The SOLIX C300 doesn't have the energy either β 245Wh usable against 1,645Wh, 1,400Wh short β so neither route works.
Battery budget usedlower = more headroom
LOADΒ Β Fridge 150WΓ8h Β· Router + Modem 20WΓ8h Β· LED Lights (4 bulbs) 40WΓ6h Β· Phone Charger 15WΓ3h
SCN-03 Β· 8 hours Β· needs 320Wh
CPAP Overnight
Sleep therapy without interruption β the #1 medical use case
Neither unit
A CPAP night needs about 320Wh, and both cover about 76% of it. Neither gets through a full night without a recharge, so plan on a bigger unit for sleep therapy.
Battery budget usedlower = more headroom
LOADΒ Β CPAP Machine 40WΓ8h
SCN-04 Β· 8 hours Β· needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
The SOLIX C300 DC has no AC outlets, so the external monitor and router + modem in this scenario never plug in β it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind of unit for the job rather than a close call. The SOLIX C300 doesn't have the energy either β 245Wh usable against 910Wh, 665Wh short β so neither route works.
Battery budget usedlower = more headroom
LOADΒ Β Laptop 60WΓ8h Β· External Monitor 30WΓ8h Β· Router + Modem 20WΓ8h Β· Phone Charger 15WΓ2h
SCN-05 Β· 4 hours Β· needs 670Wh
Tailgate Party
Game day power for the crew
Neither unit
The C300 can start the 400W peak on its 600W surge, then can't hold it on a 300W continuous rating. The DC has no AC outlets, so the blender and the TV never plug in. Neither of these is a tailgate box.
Battery budget usedlower = more headroom
LOADΒ Β Blender 400WΓ0.5h Β· LED TV (55") 80WΓ4h Β· Bluetooth Speaker 15WΓ4h Β· Phone Charger (Γ3) 45WΓ2h
SCN-06 Β· 24 hours Β· needs 4,685Wh
Van Life Daily
A full day of mobile living β the ultimate endurance test
Neither unit
The SOLIX C300 DC has no AC outlets, so the mini-fridge, led lights and the rest in this scenario never plug in β it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind of unit for the job rather than a close call. The SOLIX C300 doesn't have the energy either β 245Wh usable against 4,685Wh, 4,440Wh short β so neither route works.
Battery budget usedlower = more headroom
LOADΒ Β Mini-Fridge 150WΓ24h Β· Laptop 60WΓ4h Β· Phone Charger 15WΓ3h Β· LED Lights 40WΓ5h Β· Fan 75WΓ8h
SCN-07 Β· an afternoon Β· needs 100Wh
Afternoon Off-Grid
Phones and a speaker at the park, beach, or campsite β the small-unit job description
Either unit
This is the job these two are built for. Both finish the afternoon at 41% used. At this size, what decides it is whether your gear needs a wall plug, then weight, where the DC is 2.93 lbs lighter.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger (Γ2) 30WΓ2h Β· Bluetooth Speaker 10WΓ4h
The Load Test
RUNTIME = (Wh Γ 0.85) Γ· LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
Only the SOLIX C300 can run this load β the SOLIX C300 DC has no AC outlets for the wall-plug gear in it.
$329.99 list Β· direct from Anker
Planning for more than this? Describe your whole setup and get it sizedΒ β
Modeled from the spec record β same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.ΒΉ
Essentials
The basics you need runningscale 0β16.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β3.3hHigh-Draw Appliances
These reveal the real limitsΒΉ Runtime = (capacity Γ 0.85) Γ· appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads β see methodology.
Conclusion
October 25, 2026
Verdict: the Anker SOLIX C300
Buy the C300 if anything you'll power has a wall plug. The two share the same 288Wh capacity, the same 3,000-cycle rating and the same pair of 140W USB-C ports. The $130 between them buys the C300's inverter: three AC outlets, 300W continuous with a 600W surge, and a UPS mode rated no worse than 10ms. It also buys two more years of warranty, five against three. The C300 DC has no AC outlets at all. If every device you carry charges over USB or 12V, buy the DC instead. It's 2.93 lbs lighter, and it's cheaper to own at $0.23 per lifetime kWh against $0.38.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 25, 2026. The links below open Anker's current price.
$429.99 Β· direct from Anker
Last checked 31 days ago. Prices move β check before you buy.
or check the SOLIX C300 DC price$349.99 list
Written by Wenny Zheng, Portable Power Tester Β· Station Arena Test Desk Β· Updated October 25, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, CPAP, Tailgating.
Full specifications
α΅ Derived: price Γ· rated capacity. See the data behind our comparisons β
Comparison ToolAdd more power stations, side by sideOpen Tool βHow these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it β no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews β see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity Γ 0.85 inverter efficiency) Γ· device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page βClass ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews β no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5β . Here, SOLIX C300 rates 4.3/5 (58th percentile of 25 Personal-class units), and SOLIX C300 DC rates 4.4/5 (67th percentile of 25 Personal-class units).
How the class ranking is computed βTest Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
SOLIX C300 DC: No AC Outlets At All
The SOLIX C300 DC's 300W is a DC port total β USB and 12V β not an inverter rating. Anything with a wall plug (a fridge, a TV, a coffee maker, most fans and lamps) never plugs in, at any wattage. That's the design, not a defect: it buys weight, silence, and efficiency for phone, laptop, camera, and 12V-CPAP loads. The SOLIX C300 carries a real inverter behind 3 AC outlets, so it plays in both worlds. Decide which side of that line your gear lives on before weighing anything else on this page.
UPS Mode Lives on the C300
The C300 can sit between the wall and a router and take over when the power drops, rated no worse than 10ms. The DC lists no UPS mode, because it has no inverter to switch to. At 245Wh usable, the C300 bridges a short outage and won't run a whole night.
Five Years Against Three
The C300 is covered for five years and the DC for three. Same capacity, same cycle rating, two years' difference in cover.
One Noise Figure, One Blank
The C300 publishes 25dB. The DC publishes nothing. That says nothing about which is louder, so if you're buying for a tent or a bedroom, look for hands-on reports of the DC first.
Full record above β the Test Desk pick is the SOLIX C300.
Check SOLIX C300 price βor check the SOLIX C300 DC priceOwnership Analysis
What happens after you buy β true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
β warranty ends Β· Reaching the cycle rating means ~80% capacity remains β degraded, not dead.
Analyst note
The SOLIX C300 DC wins on both sticker price and long-term value. At $0.23/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner. One thing to know reading the table: both carry the same 3,000-cycle rating, so the lifetime rows are sticker price and capacity in disguise β the wear horizon is identical and decides nothing here.
Growth path
SOLIX C300
FIXED CAPACITYFixed at 288Wh, with no expansion β so size it for your needs up front rather than planning to add capacity later.
Accepts up to 100W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
SOLIX C300 DC
FIXED CAPACITYFixed at 288Wh, with no expansion β so size it for your needs up front rather than planning to add capacity later.
Accepts up to 100W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output β see methodology
Analyst note
Neither expands, and that's no knock on either β each is a complete unit at a fixed size. They hold the same 288Wh, so capacity can't break the tie: decide on price, weight, and the rest, and know that whichever you pick is the ceiling.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
Anker SOLIX C300
Coverage of the standard C300 starts with the spec sheet: the 600W surge and the two 140W USB-C portsA1. Anker calls it about 30% smaller than competing stations. Reviewers agree it's light and compact for its capacity, and aimed at keeping gadgets charged on hikes and camping tripsA2.
The detail reviewers keep returning to is the UPS mode. They call its 10ms switchover unusual at this size and priceA3. The unit is pitched at buyers who want reliability and smart features in a small boxA4.
β288Wh capacity with 300W output (600W with SurgePad) and dual 140W USB-C ports for fast device charging.β
Sources
ankersolix.com Β· trustedreviews.com Β· im.com.au Β· solarwaypoint.com Β· backuppowerhub.com Β· powerstationlab.com
Anker SOLIX C300 DC
Coverage of the DC starts with what it gave up. It drops the AC inverter to stay light, at about 6.2 lbsB1. What's left is two USB-A ports, four USB-C ports and a 12V car socket. Its two-way USB-C port, which both charges devices and recharges the unit, gets it to 80% in about an hourB2.
Owners say that's enough to charge a phone and laptop several times, run a fan for hours or power a small light setupB3. Reviewers frame it as a unit for travellers charging devices, with app control and solar support, and not for AC appliancesB4.
βA 288Wh unit that ditches the heavy AC inverter to focus on DC power, keeping it very light at about 6.2 lbs.β
Sources
the-gadgeteer.com Β· forbes.com Β· androidpolice.com Β· batteryessence.com Β· bestbuy.com Β· campingsolar.us
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Compact, light design; dual 140W USB-C fast charging; and a standout 10ms UPS rare at this size are the highlights. [SOLIX C300 Β· 3 entries]
- Light DC-only design (no AC inverter), fast USB-C charging, and good port selection for device charging are the highlights. [SOLIX C300 DC Β· 3 entries]
- A1
β288Wh capacity with 300W output (600W with SurgePad) and dual 140W USB-C ports for fast device charging.β
ankersolix.com / trustedreviews.com β SOLIX C300 review Β· 2026 Β· [positive]
- A2
βAnker claims the C300 is 30% smaller than competing power stations; reviewers call it impressively light and compact for the capacity, aimed at keeping phones and gadgets charged on hikes and camping trips.β
im.com.au / solarwaypoint.com β SOLIX C300 review Β· 2026 Β· [positive]
- A3
βIts 10ms UPS switchover is legitimately unique in this size and price class.β
backuppowerhub.com / powerstationlab.com β SOLIX C300 review Β· 2026 Β· [positive]
- A4
βTargets users who value reliability, smart features, and compact design.β
backuppowerhub.com β SOLIX C300 review Β· 2026 Β· [positive]
- B1
βA 288Wh unit that ditches the heavy AC inverter to focus on DC power, keeping it very light at about 6.2 lbs.β
the-gadgeteer.com / forbes.com β SOLIX C300 DC review Β· 2026 Β· [positive]
- B2
βOffers 2 USB-A and 4 USB-C ports plus a 12V car socket; two-way USB-C with PD 3.1 recharges the unit to 80% in about 1 hour.β
androidpolice.com / batteryessence.com β SOLIX C300 DC review Β· 2026 Β· [positive]
- B3
βOwners praise its portability and capacity β enough to charge a phone and laptop several times, run a fan for hours, or power a small light setup.β
bestbuy.com owner reviews β SOLIX C300 DC / C300X Β· 2026 Β· [positive]
- B4
βA DC-focused design with app integration and solar support β best for modern travelers charging devices, not running AC appliances.β
androidpolice.com / campingsolar.us β SOLIX C300 DC review Β· 2026 Β· [mixed]
Research compiled October 25, 2026.
What Owners Actually Report
Drawn from 19 comments on independent review channels β not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
Anker SOLIX C300
14 claims from 11 comments Β· 9 from owners Β· 2 with figures
- Build quality
- 2 Β· 55% negative
- Other
- 3 Β· 0% negative
- Size & weight
- 2 Β· 21% negative
- Solar input
- 3 Β· 14% negative
- Durability
- 1 Β· 0% negative
What owners complain about
Returned it: temps hit 52C and above when recharging at 300-330W, with a terrible burning plastic smell.
Build qualitymeasuredowner5 agreedsource β
A 300W inverter cannot start a fridge or drive a drill, where a 600W unit can.
Inverter & surgesource β
Calls the tall tower form factor nonsense in a car camper where a flat, stable unit is needed.
Size & weightsource β
What owners praise
Prefers the Ankers for portable use in the car or beside a chair.
Size & weightowner34 agreedsource β
Better AC outlet spacing, more USB-C ports and a light; bought two after the EcoFlow issue.
Build qualityowner4 agreedsource β
Uses two Anker 300W stations to power video lights on film shoots instead of costly V-mount batteries.
Otherowner1 agreedsource β
Anker SOLIX C300 DC
12 claims from 8 comments Β· 10 from owners Β· 5 with figures
- Solar input
- 4 Β· 100% negative
- Runtime
- 2 Β· 0% negative
- Charging
- 2 Β· 39% negative
- Other
- 1 Β· 0% negative
- Size & weight
- 1 Β· 0% negative
What owners complain about
28V input ceiling blocks a 25.6V LiFePO4 bank, which can reach 29.2V fully charged.
Solar inputmeasuredowner4 agreedsource β
Says the C300 DC has no pass-through charging and just cycles between 98% and 100%.
Charging7 agreedsource β
DC5521 plugs with poor tolerances have heated up at 5A; wishes it used XT60 throughout.
Build qualityownersource β
What owners praise
BiPAP with heated hose and humidifier at 80% used 47% of the 288Wh pack over 5 hours of sleep.
Runtimemeasuredowner5 agreedsource β
Can be charged over USB-C at up to 140W, which he thinks is fantastic.
Chargingmeasuredownersource β
His favorite unit: small, transportable, very efficient on 12V and charges well off solar.
Otherownersource β
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results β for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the SOLIX C300 if youβ¦
- βAnything on your list has a wall plug: a lamp, a router, a fan that isn't USB-powered. The DC has no AC outlets.
- βYou want a router or modem to ride through short outages. The C300's UPS mode is rated no worse than 10ms, and the DC has no UPS mode.
- βYou'd like the longer cover. The C300's warranty runs five years to the DC's three.
Buy the SOLIX C300 DC if youβ¦
- βEverything you carry charges over USB-C, USB-A or 12V. The DC saves $130, weighs 2.93 lbs less and costs less per lifetime kWh.
- βYou're packing for a device-charging trip, not home backup. It has four USB-C ports, two of them at 140W, so a laptop, a camera and a phone can charge at once.
If neither fits
If the job is a camping weekend or a blackout with a fridge in it, both fall short. Neither holds anywhere near enough energy for those lists, whichever one has the outlets. Look at a much larger station for that.
The Bottom Line
These two share a battery size, a cycle rating and a pair of 140W USB-C ports. The difference is the inverter. The C300 has three AC outlets, a 600W surge and a UPS mode. The C300 DC has none of those, and it is lighter and cheaper for it.
If a wall plug is ever part of the job, buy the C300. If every device you own already charges over USB or 12V, take the DC, keep the $130 and carry 2.93 fewer pounds.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
What's actually different between the SOLIX C300 and the SOLIX C300 DC?
The C300 has an AC inverter with three outlets, a 600W surge and a UPS mode rated no worse than 10ms. The C300 DC has no AC outlets. Both hold 288Wh, are rated for 3,000 cycles and have two 140W USB-C ports. The C300's warranty is five years against the DC's three.
Is the SOLIX C300 DC missing an AC outlet entirely?
Yes. It has no inverter. Its ports are USB-A, USB-C and a 12V car socket, and it is 2.93 lbs lighter and $130 cheaper as a result.
Which one is the better value per watt-hour?
On cost per lifetime kWh, the DC: $0.23 against $0.38. Both deliver the same 864 lifetime kWh and the DC costs less. That comparison only holds if you never need an AC outlet.
Does the shorter 3-year warranty on the C300 DC matter?
It is two years shorter than the C300's five, on a unit with the same capacity and cycle rating. If you plan to keep the unit for years, the C300 has the longer cover.
Which one should I buy for outage backup?
Neither covers a long outage at 288Wh. Keeping a router or a lamp alive through a short one needs an AC outlet, and only the standard C300 has them, with a UPS mode rated no worse than 10ms. The DC is built for charging devices.
Related comparisons
Related buying guides
Where to buy

Anker SOLIX C300Pick
$429.99
$429.99 Β· direct from Anker
Last checked 31 days ago. Prices move β check before you buy.

Anker SOLIX C300 DC
$349.99
$349.99 Β· direct from Anker
Last checked 31 days ago. Prices move β check before you buy.
Prices may vary by retailer and are subject to change.