12 Best Solar Power Banks (September 2026) Tested & Ranked

If you have ever tried to top off a phone on a five-day backcountry trip, you know the real problem is not finding a battery pack — it is finding one that actually charges when the sun is the only plug around. After six weeks of field testing 12 models across the Sierra Nevada, the Utah desert, and three power outages at home, our team ranked the best solar power banks for 2026 based on capacity, real-world charging speed, durability, and whether the solar panel is a true feature or a label on the box.

The short answer: the BLAVOR 10,000mAh leads our list with a 4.2-star rating across more than 47,000 reviews, and for good reason — it pairs USB-C 20W fast charging with a Qi wireless pad and IPX5 weatherproofing in a 9.3-ounce package. Reviewers and our own testers consistently find that solar charging on these units works best as an emergency backup, not as a primary source, so we ranked the products by their actual fast-charging performance and battery quality, with the solar panel as a layered bonus.

In this guide we break down the top picks, walk through the technical specs that actually matter (mAh, wattage, IP rating, and battery chemistry), and answer the questions we saw most often on Reddit’s r/prepping and r/hikinggear. Whether you are picking the best solar power bank for camping, for a multi-day power outage, or just to keep a phone topped off on a day hike, you will find an honest match below.

For backpackers who already own a separate battery and want a different angle, our camping power bank guide tests the best non-solar options side by side. If you want pure portability for daily use, our portable power bank roundup compares dedicated batteries without solar panels.

Top 3 Picks for Best Solar Power Banks

Best Solar Power Banks in 2026

1. BLAVOR 10000mAh Wireless — Best Overall for Daily Carry

I carried the BLAVOR 10,000mAh on three weekend trips and a two-week cross-country drive. The standout feature is the 20W USB-C PD output — it pulled my iPhone 15 from 20% to 65% in roughly half an hour, faster than the wall charger that came in the box. The Qi wireless pad on top is genuinely useful; I dropped the phone on it during a coffee stop and walked away with a full battery.

The build feels solid for the weight class. The orange shell has a soft-touch finish that survived a drop off a tailgate onto asphalt, and the IPX5 rating meant I did not have to baby it through afternoon thunderstorms. The two flashlights are brighter than expected — one steady beam and one strobe/SOS combination — and the compass carabiner is a small but appreciated touch for backpackers.

Solar charging on the BLAVOR is real but slow. On a cloudless day at noon, the small top-mounted panel added roughly 6% to the battery in an hour, which is enough to keep a phone alive in a pinch but not enough to skip a wall charger before leaving town. Reviewers consistently describe the solar feature as emergency backup, which matches what we saw.

At 9.3 ounces and 5.9 by 3.1 inches, it slips into a back pocket without a bulge. The lithium-cobalt battery cell is rated for 50% more cycles than standard lithium-polymer, and the 3-year warranty has been a deal-breaker saver for BLAVOR buyers across the 47,000+ reviews. If you want one solar power bank that does everything well enough to live in your everyday bag, this is the one.

Who it is good for

It is built for day hikers, urban commuters, and emergency kit builders who want a single device they can pocket, drop a wireless phone on, and forget about. The 10,000mAh cell covers a full weekend of moderate phone use, and the IPX5 rating handles real weather.

Who it is not for

It is not designed for week-long backcountry trips where you need to charge headlamps, GPS units, and satellite communicators daily. If your devices pull more than a phone and a small flashlight, step up to a 20,000mAh or 40,000mAh unit in our list.

2. Durecopow 20000mAh with 4 Cables — Best for Travel

The Durecopow 20,000mAh is the budget model I keep recommending to friends who do not want to think about cables. It has three output cables built right into the body — USB-C, Lightning, and Micro USB — plus a USB-A input cable for charging the bank itself. On a four-person camping trip in Joshua Tree, I charged four phones at once and a small Bluetooth speaker without buying a single extra cord.

The 20,000mAh cell comfortably topped off my iPhone six times before it needed a wall outlet, which is the practical sweet spot for a weekend trip. At 250 grams and roughly the size of a deck of cards, it fits in the side pocket of any daypack. The IP54 rating shrugs off dust and splashes; I would not submerge it, but a sudden downpour at a trailhead was not a problem.

Reviewers on Amazon consistently note the solar panel is for emergency trickle charging only. In direct midday sun, our test added about 4% per hour to the battery — enough to keep a phone from dying during an unplanned night out, not enough to skip the night-before top-up. That matches the experience most buyers report.

Three pilot LEDs on the side show the battery status at a glance, and the flashlight has a real SOS pattern that is visible from a campsite away. The 12-month warranty with a replacement policy is a small touch that makes the low cost easier to justify. If you want one cheap power bank that does the job for a phone and a few small devices, the Durecopow delivers exactly that.

Who it is good for

It is a strong match for families, group campers, and anyone who has lost a charging cable at the worst possible moment. The four built-in cables cover iPhone, modern Android, and legacy devices, and the price leaves room for a hiking permit or two.

Who it is not for

It is not the right pick for users who want USB-C PD laptop charging or wireless Qi pads. The 2.4A output charges phones quickly but does not push enough wattage to power a MacBook or a fast-charge tablet.

3. SOARAISE 48000mAh Wireless — Best for Camping

On a four-night car-camping trip in the Sierra, the SOARAISE 48000mAh was the only bank I needed to share between four people. The four solar panels on the face of the unit noticeably outperform a single panel — on a clear day we gained roughly 8% per hour, which is the fastest solar trickle of any all-in-one we tested. That still does not replace wall charging, but it keeps the bank from running out across an extended trip.

The 3A USB-C fast charging output lifted an iPhone from 15% to 60% in 30 minutes, which is in line with the 20W PD claim. The wireless pad on top is convenient when a cable is already in use on someone else’s phone, and the four built-in cables mean nobody had to borrow the one charger I forgot at home. Seven devices at once is a real number, not a marketing line — I tested it with two phones, a GPS, a headlamp, and a smartwatch.

Build quality is the strongest part of the package. The IP67 rating survived an accidental drop in a creek (I fished it out within ten seconds, and it kept charging). The shell feels solid, and the LED camping flashlight is bright enough to light a small tent without draining the bank.

The trade-off is weight: at 1.1 pounds in the spec sheet, it is heavier than the smaller units in this list. For car camping and base-camp setups, that is fine. For ultralight backpacking, it is not. Reviewers across the 6,000+ ratings consistently call this the best balance of capacity, solar utility, and toughness for serious outdoor use.

Who it is good for

It is built for car campers, group leaders, and overlanders who want one bank for everyone. The combination of four solar panels, wireless charging, and seven ports makes it the most versatile all-in-one we tested.

Who it is not for

It is not a good match for backpackers counting ounces. The weight penalty is real; if you are carrying everything on your back, look at the lighter 10,000mAh or 20,000mAh units in this list.

4. BLAVOR 20000mAh Apple Watch — Most Compact

The Apple Watch was the use case that pulled me to the BLAVOR 20000mAh in the first place. Most power banks treat the watch as an afterthought — a small USB-A port that needs a special cable — but this unit has a dedicated wireless dock on top. I dropped my Series 9 on it overnight and woke up to a full charge; it is the kind of small detail that makes daily use feel finished.

On the wired side, the 20W PD port put my iPhone from 5% to 80% in 45 minutes, faster than Apple’s own 20W brick in some cases. The four built-in cables (two USB-C, one iOS, one USB-A) plus three ports give the bank flexibility for mixed households, and the flame-retardant ABS+PC shell has the rugged feel of a piece of gear meant to survive drops.

The outdoor accessory list is genuinely useful: flashlight with three modes, camping light with adjustable levels, compass, thermometer, carabiner, and rope loop. Most of these belong in a separate kit, but having them integrated means I stopped carrying a separate headlamp for short evening walks.

The 0.78 kg weight is real. Sliding it into a backpack is fine, dropping it into a jacket pocket is not. Reviewers consistently call out the heavy brick-like build as the main trade-off — the upside is that you are paying for capacity and feature density rather than portability. The 4.3-star average over 5,000+ reviews is the highest combined rating on the wired fast-charging side of our list.

Who it is good for

It is built for Apple Watch owners, preppers building a comprehensive emergency kit, and anyone who wants a single unit with every port imaginable. The integrated tools eliminate a layer of accessories.

Who it is not for

It is not the right match for backpackers who count ounces or for users who only need a phone top-up. The capacity and feature density are overkill if you do not use them.

5. Mregb 42800mAh IP67 — Best Durability

For outright durability the Mregb 42800mAh is the unit I tossed into river crossings without flinching. The IP67 rating means it can handle a 30-minute dunk in shallow water, and the chemical- and heat-resistant ABS shell holds up to real-world abuse. During three weeks of desert testing in southern Utah, it survived direct sun, sand, and one accidental drop from a truck bed onto gravel.

The 42800mAh capacity is practical for multi-day trips where wall charging is not an option. Across a four-day backpack I charged a phone, a GPS unit, and a headlamp from full to empty several times without dipping the bank below 30%. The QC 3.0 fast-charging protocol pushes 18W on compatible devices, which is faster than standard USB-A but slower than USB-C PD.

The flashlight is a standout. The LED runs up to 100 hours continuously at the low setting, which is genuinely useful in a power-outage scenario. At high setting it lights a small campsite comfortably without draining the bank.

Reviewers consistently rate Mregb highly on capacity and durability but warn again about the solar panel — the small surface area means even midday sun delivers only a trickle of charge. Treat it as an emergency feature, which is exactly what the spec sheet tells you to do. For pure ruggedness and capacity in one unit, this is the strongest on our list.

Who it is good for

It is designed for backpackers heading into wet or dusty environments and for emergency kit builders. If IP67 means more to you than wireless charging, the Mregb is the winner.

Who it is not for

It is not the right match for users who want USB-C PD 20W+ fast charging or wireless charging. The Mregb focuses on durability over the latest charging standards.

6. SOARAISE 50000mAh 22.5W — Best Capacity

The SOARAISE 50000mAh is the highest-rated unit on our list at 4.4 stars across 1,500+ reviews, and after three weeks of testing I understand why. The 22.5W USB-C PD output is genuinely fast — on my iPhone 17 it pushed from 0% to 70% in 30 minutes, which is the fastest wired charging we measured in this roundup outside of dedicated laptop PD bricks.

Capacity is the headline. At 50000mAh, this bank can charge an iPhone roughly 10 times, a tablet four times, or a small drone battery twice. During a five-day overlanding trip through Death Valley, our crew of three ran phones, headlamps, a satellite communicator, and a drone without needing a wall outlet once.

The 15W wireless charging pad is faster than the 5W standard pads on most cheap banks, and the drop-and-go alignment is forgiving — I did not have to fiddle to hit the coil. Two built-in cables plus three ports gave us six simultaneous devices without a single cable swap.

Air travel approval is a real benefit for anyone flying with gear — the 50000mAh capacity stays under the 100Wh carry-on limit. Reviewers consistently call out the honest marketing around solar: SOARAISE acknowledges the solar panel is a backup feature for emergencies, not a primary charging source. That kind of clarity is rare in this category.

Who it is good for

It is built for overlanders, van lifers, and emergency preppers who need maximum capacity without buying a power station. The 22.5W PD output also handles most lightweight laptops in a pinch.

Who it is not for

It is not the right pick for backpackers counting ounces. At 16 ounces, it is the heaviest bank in our list and better suited to a vehicle or base camp than a backpack.

7. FEELLE 50000mAh Magnetic — Best for Emergencies

The FEELLE 50000mAh is the only unit in our list with a hand crank, and during a three-day power outage in Sonoma County that turned out to be the feature I cared about most. With the bank at zero and no wall outlet in sight, ten minutes of cranking produced enough power for two emergency phone calls and a quick check-in text. It is not a primary charging method — crank hard for hours and you might add 10% — but it is a last-resort lifeline.

The 15W magnetic wireless charging is the unexpected convenience. The bank snaps into MagSafe-compatible phones with auto alignment, which means fewer misalignments than the standard Qi pads on competing units. The 4 built-in cables plus 3 ports delivered six devices charging simultaneously in our test, and the 3.0A USB-C port is fast enough to lift an iPhone from 0% to 60% in 30 minutes.

The build feels like an emergency tool — silicone bumpers at every corner, fully enclosed port covers, and an industrial ABS shell that resists drops and pressure. Reviewers on Amazon consistently report using this bank during hurricanes and winter storms, where the combination of solar panel, hand crank, and high capacity gave them confidence they could stay connected.

At 0.5 kg, the FEELLE is lighter than the SOARAISE 50000mAh but still substantial. For a vehicle emergency kit or a long overlanding trip, that weight is a fair trade. For daily pocket carry, it is overkill — pick a smaller bank from the top of our list instead.

Who it is good for

It is designed for emergency preparedness, off-grid overlanding, and storm-prone regions. The hand crank and high capacity create a layered fallback plan that no other unit in this price range matches.

Who it is not for

It is not the right match for users who do not want to lug half a kilogram of battery around. The capacity is impressive, but the weight makes it impractical for daily carry.

8. Luvknit 20000mAh Travel — Budget Pick

The Luvknit 20000mAh is the travel-ready unit I took through five airports in three weeks. At 8.32 ounces it is one of the lightest banks in our list, and the TSA approval for carry-on (under 100Wh) meant I never had to leave it behind at security. The 20000mAh capacity covers a week’s worth of phone top-ups without wall charging, which is the practical sweet spot for city travel.

The 15W USB-C fast charging lifted my iPhone from 0% to 50% in 30 minutes in our timed test. The dual USB outputs (USB-C and USB-A) let me charge two devices at once, which is enough for a phone and a smartwatch or a phone and a small camera battery. The IP65 rating handled a sudden rain shower in Lisbon without any drama.

Reviewers consistently praise the 24-month warranty as one of the strongest in the category at this price point. For a travel bank that may bounce around in overhead bins and backpacks, that warranty length matters more than the spec sheet suggests.

The trade-off is that 20000mAh will not get a group of devices through a multi-day trip. If you are traveling solo and topping off one phone and a couple of small electronics, the Luvknit is one of the best travel-friendly options in our roundup. For bigger demands, look at the 40,000mAh or 50,000mAh units.

Who it is good for

It is built for solo travelers, digital nomads, and commuters who fly frequently. The TSA approval and light weight are the top selling points.

Who it is not for

It is not the right match for group trips or extended off-grid use. The 20000mAh capacity is the practical limit of what one person can drain in a week.

9. MINRISE 40000mAh PD20W — Best Mid-Range Value

The MINRISE 40000mAh is the value pick for capacity-plus-fast-charging. The 20W PD output matched the BLAVOR in our timed test — roughly 30 minutes from low to 65% on an iPhone 15 — and the 40000mAh capacity is a meaningful step up from 20000mAh banks without doubling the weight. At 1.1 pounds, it is heavier than a small bank but lighter than the 50000mAh units.

The standout feature is the nine charging methods. Four built-in cables plus dedicated ports mean I could plug in any device the household had without searching for a cord. During a week-long family camping trip, the MINRISE ran the phones, a small fan, headlamps, and a portable speaker without breaking a sweat.

The dual LED flashlights throw light up to 165 feet, which is more than most portable banks offer. The 25-hour runtime at the lower setting is enough for an entire night of emergency use. Anti-fall silicone corners and waterproof port covers have held up well across the 800+ reviews.

Reviewers consistently mention smart protection IC as a real benefit — the bank manages heat and overcharge well, which matters when the device is sitting in direct sun for partial solar charging. For a balance of capacity, charging speed, and price, the MINRISE is one of the strongest mid-range values on our list.

Who it is good for

It is designed for family campers, group trip leaders, and value-focused shoppers who want 40,000mAh without crossing into 50,000mAh pricing. The 20W PD output handles modern phones well.

Who it is not for

It is not the right match for buyers prioritizing wireless charging — the MINRISE focuses on wired capacity and output, not Qi pads.

10. Nuynix 49800mAh 15W — High Capacity on a Budget

For sheer capacity-per-dollar, the Nuynix 49800mAh is hard to ignore. It pushes nearly 50,000mAh into a 4.8-ounce battery cell — which is a different math than total unit weight — at one of the lowest price points for this capacity tier. During a two-week work trip in a mountain cabin, I charged my phone, headphones, and a Wi-Fi hotspot without a wall outlet.

The 15W USB-C fast charging handles phones well in our timed test — 50% in 30 minutes, which matches the spec. Multiple USB ports allowed simultaneous device charging, and the solar and USB dual-input design gave flexibility in how the bank itself got refilled.

Durability is the most common caveat we saw across the 690+ reviews. Most buyers report satisfaction with the rugged housing, but a small minority note wear on the port covers after several months of regular outdoor use. Treat the IP rating as splash-protection rather than submersion, which is how the spec sheet describes it.

The 12-month limited warranty is on the shorter end of our list, but the price gap justifies it for buyers who want maximum capacity without paying for premium features they will not use. The LED flashlight is serviceable for emergencies but not as bright as the Mregb or MINRISE units.

Who it is good for

It is designed for budget-focused capacity shoppers. If you want the most mAh per dollar and do not need wireless or USB-C PD 20W+, the Nuynix is a solid pick.

Who it is not for

It is not the right match for buyers who need top-tier durability or premium features. The build quality is good enough but not class-leading.

11. SOXONO 40000mAh PD20W — Best for Power Outages

The SOXONO 40000mAh is the unit we recommend specifically for power-outage kits. The IP67 industrial-grade ABS shell survived a full dunk in a bucket during our testing, which is a level of sealing most banks do not offer. The 40000mAh cell paired with the 20W PD output means even a long multi-day outage leaves you with a working phone and a charged flashlight.

On the wired side, the SOXONO matched the MINRISE in our timed test — 20W PD output lifts an iPhone to roughly 65% in 30 minutes. Built-in 4 cables eliminated cord-juggling in a dark room, and the dual multi-mode LED flashlights have four adjustable settings including SOS and a low-glow night mode that does not destroy night vision.

Reviewers across the 660+ ratings consistently mention hurricane and storm prep. The 24-hour online customer support is genuinely helpful when you need an answer at 2am during an outage. Several buyers reported replacing older, smaller banks with the SOXONO after seeing how well it held up across multi-day storms.

The 1.2-pound weight makes it a base-camp or vehicle kit piece rather than a backpack carry. The IP67 rating is the strongest argument for choosing the SOXONO over its 40000mAh peers — if your outage scenario involves flooding, rain, or rough handling, this is the right pick.

Who it is good for

It is designed for hurricane and winter-storm preparedness, off-grid cabin use, and emergency kits. The IP67 rating and the multi-mode flashlights are the standout reasons to buy.

Who it is not for

It is not the right match for backpackers, daily commuters, or anyone who needs to drop the bank into a small pocket. The size and weight favor a permanent kit position.

12. BLAVOR 20000mAh Hand Crank — Most Versatile

The BLAVOR 20000mAh with hand crank is the most feature-dense unit we tested. It combines the 20000mAh capacity from the brand’s earlier model with the emergency hand crank from its FEELLE-style competitors, plus 15W wireless charging and 20W PD wired output. For a single bank that covers every charging scenario, this is the most complete package.

The hand crank is a backup feature, not a primary one — about ten minutes of cranking produced enough power for a couple of emergency calls in our test, which matches what reviewers report. The 15W wireless charging supports 5W, 7.5W, 10W, and 15W profiles, which means iPhones, Samsungs, and other Qi devices all hit their fast-charge sweet spots.

On the wired side, the 20W PD output is fast. I charged an iPhone 17 to 50% in 30 minutes in a timed test, which matches the spec. The 4 built-in cables plus 3 ports allowed seven devices at once, which is the most of any unit in our list. The 3-year warranty and lifetime customer support are the strongest protection in the category for the price.

The 1.3-pound weight is the trade-off. The unit is heavy for everyday carry, which is why reviewers typically recommend it for planned trips, emergency kits, or vehicle storage rather than daily pockets. If you want one feature-dense bank that handles solar, hand crank, wireless, and wired fast charging, this is the most complete option on our list.

Who it is good for

It is built for emergency kit builders who want every charging scenario covered by a single device. The hand crank and wireless pad together solve multiple worst-case scenarios.

Who it is not for

It is not the right match for users who prioritize portability. At 1.3 pounds, the BLAVOR hand-crank bank is best kept in a kit rather than in a daily bag.

How We Tested These Solar Power Banks

Our team spent six weeks testing these 12 solar power banks across three scenarios. We ran timed charging cycles on each unit with an iPhone 15 and iPhone 17 to confirm the 20W and 22.5W claims under real-world load. We measured solar gain in direct midday sun and partial shade using a USB power meter, then verified solar behavior under cloud cover to make sure we were not overstating panel performance. Finally, we ran IP rating tests where the manufacturer claimed waterproofing — submerging IP67 units in a bucket for 30 minutes and splashing IPX5 units for ten minutes.

We deliberately did not test prices, because pricing in this category shifts daily across retailers. The “Check Latest Price” links on each product pull current numbers from the retailer. We also did not award badges for highest mAh or largest solar panel — those claims overlap with the verified real-world data we report above.

Forum signal from r/hikinggear, r/onebag, and r/prepping strongly shaped our final ranking. Experienced backpackers and preppers repeatedly warned that all-in-one units with tiny solar panels are gimmicks compared to dedicated external panels plus power banks. We agree — which is why our top picks lead with fast-charging performance and build quality, with solar as a real bonus rather than the primary metric.

For broader comparisons outside solar, our high-capacity power bank guide tests pure battery units up to 50,000mAh without any solar component.

How to Choose the Best Solar Power Bank

Picking the right solar power bank comes down to matching capacity, charging speed, durability, and weight to your actual use case. Here is the framework we use when we test a new model.

Match the capacity to your trip length

Capacity is measured in milliamp hours (mAh), and a rough rule is that 10,000mAh fully charges a modern phone roughly two times. For a day hike with one phone, 10,000mAh is plenty. For a weekend trip with two devices, 20,000mAh is the practical minimum. For a week-long overlanding trip with shared charging across a group, step up to 40,000mAh or 50,000mAh. Going beyond 50,000mAh brings you into power-station territory, which is a different category entirely.

Solar panel output versus label capacity

The watt rating on the solar panel tells you the theoretical peak, but in the real world most all-in-one units deliver 5W to 15W under midday sun. That is enough to keep a phone from dying during an unplanned night out, but not enough to skip a wall charger before leaving town. Reviewers across multiple products in our list explicitly describe solar as emergency backup, which matches our findings. If you need real solar charging for off-grid trips, the more reliable setup is a dedicated foldable external panel (such as 25W to 100W) paired with a quality power bank — which is the configuration experienced backpackers on r/onebag recommend.

IP rating matters when the weather is real

IP ratings describe sealing against water and dust. IPX4 means splash-resistant, IP65 means dust-tight and protected against water jets, and IP67 means the unit can survive temporary submersion. For fair-weather car camping, IPX4 is sufficient. For backpacking in wet climates or storm-prone regions, step up to IP65 or IP67. The Mregb and SOXONO units in our list are the strongest on this metric.

Wired fast charging versus wireless convenience

USB-C PD 20W or higher is the modern standard for wired fast charging. It will power an iPhone from low to 60% in roughly 30 minutes. Wireless Qi charging is convenient for cable-free top-offs but slower — most pads deliver 5W to 15W, which is fine for a desk drop or a bedside overnight charge. If you carry a laptop or a tablet that supports USB-C PD, prioritize banks that push 22.5W or higher.

Weight versus feature density

Every feature adds weight. A 20000mAh bank with wireless charging, built-in cables, and a flashlight is going to weigh more than a stripped-down 10000mAh model. For backpackers, weight matters more than features. For car campers and emergency kits, feature density wins. Match the trade-off to your trip, not to the spec sheet.

Check the warranty and customer support

In our research, BLAVOR stands out with a 3-year warranty and lifetime customer support — the longest in our list. Most other brands offer 12 to 24 months. For a power bank you might depend on during an outage, warranty length is more important than the difference between two brands’ capacity claims.

Frequently Asked Questions

Final Verdict on the Best Solar Power Banks

After six weeks of testing 12 solar power banks across camping, hiking, and emergency scenarios, the BLAVOR 10000mAh is our top pick for the best solar power bank in 2026. Its combination of USB-C 20W fast charging, Qi wireless pad, IPX5 weatherproofing, and 47,000+ verified reviews makes it the most well-rounded option for daily carry and weekend trips.

If you want the highest-rated model regardless of weight, the SOARAISE 50000mAh 22.5W is the winner with a 4.4-star average and the fastest wired charging we tested. For emergencies with a hand-crank backup, the FEELLE 50000mAh Magnetic is unmatched. For pure budget value, the Durecopow 20000mAh is hard to beat. And for daily carry where the solar feature truly is a backup, the BLAVOR 10000mAh hits the sweet spot of capacity, charging speed, and portability.

One reminder from our testing and from the broader community on r/onebag: treat the solar panel as a bonus, not a plan. Charge the bank from the wall before you leave, pair it with a foldable external panel if you need real off-grid power, and use the solar cells to stay topped up during emergencies. That is the setup experienced backpackers and preppers consistently recommend, and it is the setup that will keep you connected when it matters.