Solar panels for a power station: how many, and how long
Panels are where the optimism creeps into a backup plan. The arithmetic is simple enough to do on the back of an envelope, and the answer it gives you is the best case, not the likely one.
Start with the arithmetic and treat the answer as a floor. Divide the energy you need to replace by a panel's rated watts and you get the hours of full sun it would take under perfect conditions.
Conditions are not perfect: real panels deliver less than their rating because of angle, temperature, cloud and the station's charge controller. Two numbers on the station then decide what you can connect at all. The solar input ceiling caps the watts it will accept, from 400 W on a Jackery Explorer 1000 v2 to 2,600 W on an EcoFlow DELTA Pro 3, and the voltage window decides whether a panel charges it or does nothing.
How a station takes solar
Three things on the station govern what you can plug into its solar port, and all three belong to the station rather than to the panel: the input ceiling in watts, the voltage window, and the connector. The charge controller sits inside the box, so the station's limits bind and not the panel's. Every pick's ceiling is in the table below.
A panel whose open-circuit voltage falls outside the window will not charge the station at all. That is a wall, not slow charging.
- Voltage window. Most of the picks want 11 to 60 V: the DELTA 2 Max, the DELTA 3 Plus, the C1000, the F3800 and the Explorer 2000 v2. The Explorer 1000 v2 starts a volt higher, at 12 to 60 V. Two run much wider, the DELTA Pro 3 at 11 to 150 V and the Explorer 5000 Plus at 11 to 450 V, which is the difference between a couple of panels and a long series string. We did not find a voltage window for the DELTA 3 Classic or the DELTA 3 Ultra Plus on their product pages.
- Connector and ports. XT60 on the C1000, the F3800 and the DELTA 3 Plus; the XT60 and XT60i ecosystem on the DELTA Pro 3; DC8020 across the Jackery Explorers. We did not find the connector named for the DELTA 2 Max, the DELTA 3 Classic or the DELTA 3 Ultra Plus on their product pages. Two inputs, so an array can be split across them, on the DELTA 2 Max, the DELTA Pro 3, the DELTA 3 Plus and all three Jackery Explorers.
How many hours of sun each pick needs
The hard home-backup day in our planner needs about 5,120 watt-hours; the easy one needs about 1,740. Sized against the hard end, every station we track runs out before the day does, and the gap it leaves is the third column. Divide that gap by the watts going in and you get the hours of full sun it would take to close it.
The fourth column assumes the station accepts its maximum for every minute of those hours, which is the most optimistic reading available. The fifth is the same gap against one 200 W panel, which is what most people own, and it lands between 31 and 48 hours for every pick. Neither column is a forecast; they are the floor under a real day.
| Station | Solar input ceiling | Worst-case gap to close | Hours of full sun at the ceiling | Hours with one 200 W panel |
|---|---|---|---|---|
| EcoFlow DELTA Pro 3 | 2,600 W | 2,059 Wh | 0.8 h | 10 h |
| Anker SOLIX F3800 | 2,400 W | 2,510 Wh | 1.0 h | 13 h |
| EcoFlow DELTA 3 Ultra Plus | 1,600 W | 2,798 Wh | 1.7 h | 14 h |
| Jackery Explorer 5000 Plus | 1,200 W | 1,881 Wh | 1.6 h | 9.4 h |
| EcoFlow DELTA 2 Max | 1,000 W | 3,433 Wh | 3.4 h | 17 h |
| EcoFlow DELTA 3 Plus | 1,000 W | 4,286 Wh | 4.3 h | 21 h |
| Anker SOLIX C1000 | 600 W | 4,200 Wh | 7.0 h | 21 h |
| EcoFlow DELTA 3 Classic | 500 W | 4,266 Wh | 8.5 h | 21 h |
| Jackery Explorer 2000 v2 | 400 W | 3,507 Wh | 8.8 h | 18 h |
| Jackery Explorer 1000 v2 | 400 W | 4,247 Wh | 11 h | 21 h |
The gap is what a full charge leaves uncovered on the hard backup day of about 5,120 watt-hours, counting the power each station uses just to stay on. Both hour columns are shortfall divided by watts, so both are floors.
Why the rating is a ceiling, not a yield
A 200 W panel is a 200 W panel under test conditions, and the number on the box is what it can do rather than what it will do. Four things take their cut. The angle between panel and sun changes through the morning unless you get up and move it. Panels lose output as they get hot, which is a problem on exactly the bright still days that look best for charging. Cloud is the obvious one, and the overcast that arrives with a storm is the weather you are most likely to be charging in. The station's charge controller then takes its share turning panel output into battery charge.
That is mechanism, not measurement. We have not put these panels on a roof with a meter, so we will not publish a percentage. Read the table above as a ranking of which picks are in the same league, and assume the true hours are worse than the printed ones.
The ceiling cuts the other way too. Connecting 1,200 W of panels to the Anker SOLIX C1000 does not beat its 600 W limit; the station takes what it takes. Extra panels buy a better chance of reaching the ceiling in poor light, not a higher ceiling.
Which panels fit which stations
These are the panels the makers themselves name against the stations we track, taken from our accessory record. Where a row says the listing is verified, we have matched the panel to a real retail listing; where it does not, the panel appears in the maker's own material but we have not confirmed a listing. Every panel is sold separately from the station.
One gap is worth flagging before you shop. Jackery's accessory index lists the SolarSaga family without saying which Explorer each panel fits, so for those, confirm the connector and the voltage window against your own station first.
| Panel | Fits | What the maker says | Verified listing |
|---|---|---|---|
| Anker SOLIX 100W Bifacial Solar Panel | Anker SOLIX C1000 | Official C1000 solar option | Yes |
| Anker SOLIX 200W Bifacial Solar Panel | Anker SOLIX C1000 | Official C1000 solar option | Yes |
| Anker SOLIX 400W Portable Solar Panel | Anker SOLIX C1000, Anker SOLIX F3800 | Official solar option on both | Yes |
| Anker SOLIX PS100 / PS200 / PS400 series | Anker SOLIX C1000 | Page FAQ states compatibility with PS100, PS200 or PS400 | No |
| EcoFlow 110W portable solar panel | EcoFlow RIVER 3 | 110W portable solar panel | Yes |
| EcoFlow 160W Portable Solar Panel | EcoFlow DELTA 3 Plus | Named solar option | No |
| EcoFlow 220W NextGen Bifacial Solar Panels | EcoFlow DELTA 2 Max | Named solar option | Yes |
| EcoFlow 220W Portable Solar Panel | EcoFlow DELTA 3 Plus | Named solar option | Yes |
| EcoFlow 220W Solar Panels | EcoFlow DELTA Pro 3 | Referenced in bundle options | Yes |
| EcoFlow 400W Portable Solar Panel | EcoFlow DELTA 2 Max, EcoFlow DELTA Pro 3 | Named solar option | Yes |
| EcoFlow 500W Portable Solar Kit | EcoFlow DELTA Pro 3 | Four 125W bifacial modular panels | Yes |
| EcoFlow 500W Solar Kit | EcoFlow DELTA 2 Max | Named solar option | Yes |
| Jackery SolarSaga family: 500X, 200W, 100 Prime, 100 Light, 100 Air, 40 Air | Not stated | Listed without per-Explorer compatibility; confirm connector and voltage window first | No |
Panels the makers name against the stations we track. The RIVER 3 is not one of our backup picks; it is here because that panel is listed against it.
Charging while you are still powering loads
Nothing stops you running the fridge from the station while panels feed it, and in an outage that is exactly what happens. The arithmetic just changes: what refills the battery is the panel input minus whatever the loads are drawing, so the hours in the table stretch by however much the house is taking.
Put a number on it. The hard backup day is about 5,120 watt-hours over 24 hours, an average of about 210 watts. Panels make their best power for only a few hours around noon, so to refill a whole day in that window the solar ceiling has to be several times the average, and a small ceiling leaves a thin margin. The stations with room to spare are the ones whose ceilings run into thousands of watts: the DELTA Pro 3 at 2,600 W, the F3800 at 2,400 W, the DELTA 3 Ultra Plus at 1,600 W and the Explorer 5000 Plus at 1,200 W.
The other half of the problem is the clock. Sun hours are a fraction of the day, and the fridge runs through the night at the rate it ran at noon. A day's charging has to cover the night that follows it as well.
A realistic plan for a multi-day outage
Solar turns a fixed battery into an extendable one, which is the whole reason to buy panels. What it does not do is guarantee a refill on a schedule, and the storm that caused the outage is often the weather that flattens the panels. Plan on the assumption that some days close the gap and some days do not.
- Check the voltage window before the watts. A panel outside the station's window does not charge it slowly; it does not charge it at all.
- Buy up to the station's ceiling, not past it. On a Jackery Explorer 1000 v2 that is 400 W, so two 200 W panels, and 23.8 hours of full sun is the floor on its worst-case gap.
- Use both inputs if the station has two: the DELTA 2 Max, the DELTA Pro 3, the DELTA 3 Plus and all three Jackery Explorers do.
- Size the array against the gap you actually have. The hard day leaves between 1,881 and 4,286 watt-hours uncovered depending on the station; the easy day for the whole plan is about 1,740 watt-hours, a fraction of the hard one.
- Plan for the dark. Panels stop at sunset and the fridge does not, so the night is a storage question rather than a solar one, which is where expansion batteries come in.
Questions people ask
How many solar panels do I need to charge a power station?
Divide the energy you have to replace by the panel's rated watts, then check that against the station's input ceiling, because the ceiling usually decides it. A Jackery Explorer 1000 v2 has 9,506 watt-hours to make up on the worst-case day but accepts only 400 W, so two 200 W panels is its limit and 23.8 hours of full sun is the floor.
How long does it take to charge a power station with solar?
Against the hard backup day of about 5,120 watt-hours, the stations in our table need from 0.8 to 11 hours of full sun at their solar ceilings to close the gap. With a single 200 W panel they need 9.4 to 21 hours, and all of those numbers are floors.
Can I use any solar panel with any power station?
No. The panel's open-circuit voltage has to sit inside the station's solar input window or it will not charge, and the connector has to match: XT60 on the C1000, the F3800 and the DELTA 3 Plus, the XT60 and XT60i ecosystem on the DELTA Pro 3, DC8020 on the Jackery Explorers. Jackery's index does not say which Explorer each SolarSaga panel fits.
Can I charge from solar while the station is running the fridge?
Yes, and that is the normal case in an outage. What refills the battery is the panel input minus what the loads draw, so the charging hours stretch. The worst-case day averages about 434 watts of continuous draw across 24 hours, which a 400 W ceiling cannot outrun even in perfect sun.
Which of these stations takes the most solar?
The EcoFlow DELTA Pro 3 at 2,600 W, then the Anker SOLIX F3800 at 2,400 W, the DELTA 3 Ultra Plus at 1,600 W and the Jackery Explorer 5000 Plus at 1,200 W. The Pro 3 and the 5000 Plus also have the widest voltage windows, 11 to 150 V and 11 to 450 V. The smallest ceilings on the list are 400 W.
Sources
Read next
- Best power stations for home backup
- Best power stations for camping
- Expansion batteries
- Which EcoFlow DELTA 3?
- How long power outages last where you live (ZIP lookup)
- Plug-in solar: is it legal where you live, and how much power it makes
- Plug-in solar kits sold in the US, with their safety listings checked
- Plug-in solar in California: legal from January 1, 2027