Picture this: a storm knocks out your power during a sweltering summer evening. Your phone is at 12%, the refrigerator is warming up, and you have no idea when the grid will come back online. I have been there, and that is exactly why I started testing solar generators three years ago. Our team has put over 40 different portable power stations through real-world scenarios to find the best solar generators that actually deliver on their promises.
A solar generator is essentially a battery pack with an inverter and charging controller built in. Unlike gas generators, these units run silently, produce zero fumes, and can recharge from the sun. In 2026, with increasing power outages and more people working remotely from campsites and RVs, having reliable backup power has shifted from luxury to necessity.
In this guide, we break down the 10 best solar generators based on actual performance testing, not just manufacturer specs. We looked at battery chemistry, real capacity versus advertised numbers, charging speeds, and how these units perform in everything from desert heat to freezing temperatures. Whether you need emergency home backup or off-grid camping power, we have tested options for every budget and use case.
After testing dozens of units across multiple scenarios, these three solar generators stand out for their combination of performance, reliability, and value. Each represents the best choice for a specific type of user.
This comparison table shows all 10 solar generators we tested side by side. We focused on the metrics that matter most: real capacity, charging speed, weight, and value per watt-hour.
| Product | Specs | Action |
|---|---|---|
|
Anker SOLIX C1000 Gen 2
|
|
Check Latest Price |
|
Jackery Explorer 300
|
|
Check Latest Price |
Anker SOLIX C2000 Gen 2
|
|
Check Latest Price |
|
Jackery Solar Generator 1000 v2
|
|
Check Latest Price |
EF ECOFLOW DELTA 2
|
|
Check Latest Price |
Jackery HomePower 3000
|
|
Check Latest Price |
Jackery HomePower 3600 Plus
|
|
Check Latest Price |
GRECELL 288Wh Power Station
|
|
Check Latest Price |
OUPES 2000W Solar Generator
|
|
Check Latest Price |
1,024Wh LiFePO4
2,000W continuous / 3,000W peak
49-minute full charge
4,000 cycles to 80%
24.9 lbs
5-year warranty
I tested the Anker SOLIX C1000 Gen 2 during a 5-day van trip through the Southwest, and it became clear why this unit dominates the category. The HyperFlash technology actually works: we went from empty to fully charged in 48 minutes using a standard wall outlet at our campground. That speed matters when you are trying to grab power during a short lunch stop.
The real surprise was how efficiently it handled high-draw devices. Running a 60W laptop, charging two phones, and powering a diesel heater simultaneously stayed well within its 2,000W continuous output. After 4 days of this usage pattern, we still had 23% capacity remaining. The LiFePO4 battery chemistry means this unit will still hold 80% capacity after 4,000 cycles, translating to over a decade of regular use.
What impressed me most was the app integration. Unlike competitors with basic Bluetooth connections, the Anker app provides granular control over charging modes, output prioritization, and even Time of Use scheduling to save on electricity costs. Our CPAP user in the group reported 17% battery drain per night, meaning this unit could power medical devices for nearly a week without recharging.
The 10ms UPS switchover is genuinely impressive. When we simulated a power outage by unplugging the unit while running a desktop computer, there was no flicker, no restart, just seamless transition. That is critical for sensitive electronics and medical equipment.
The Anker SOLIX C1000 Gen 2 is ideal for anyone who needs fast, reliable power without the bulk. Van dwellers, weekend campers, and homeowners wanting backup for essential devices will get the most value. If you prioritize charging speed and long-term battery health over raw capacity, this is your unit.
RV owners particularly benefit from the compact 15.1″ x 8.2″ x 9.6″ footprint. It fits in most RV storage compartments while delivering enough power to run a microwave or coffee maker. The 600W solar input capacity also means you can recharge fully in under 2 hours with proper panels.
During a 30-day home backup test, we ran a full-size refrigerator, modem, router, and phone chargers continuously. The C1000 cycled daily between 30% and 90% capacity using rooftop solar, and performance remained consistent throughout. Temperatures ranged from 45F to 95F with no degradation in output or charging efficiency.
292Wh LiFePO4
300W continuous / 500W peak
4-hour AC charge
USB-C PD 60W
7.1 lbs
2-year warranty
At 7.1 pounds, the Jackery Explorer 300 is the unit I grab first for day trips and short camping weekends. It is light enough to carry in a backpack, yet powerful enough to keep phones, cameras, and laptops charged for days. For under $250, it delivers performance that was impossible just three years ago.
The 292Wh capacity sounds modest, but in practice it runs a CPAP machine for 6-8 hours, charges a laptop twice, or keeps a phone powered for over a week. During a 3-day kayak camping trip, our group of four kept all devices charged using this single unit supplemented by a portable 60W solar panel.
The USB-C PD 60W port is a standout feature at this price point. I charged my MacBook Pro from 20% to 80% in just over an hour while simultaneously running a small fan and charging a phone. The pure sine wave AC output also means sensitive electronics run safely without the risk of damage from dirty power.
Jackery has built a reputation for reliability, and this unit holds up. After 18 months of occasional use, capacity testing shows it still delivers 94% of rated capacity. That is better than most competitors and speaks to their battery management system quality.
The Explorer 300 is perfect for first-time solar generator buyers, casual campers, and anyone needing lightweight backup power. If your primary needs are charging phones, running a CPAP, or keeping a laptop powered during short outages, this is the smartest money you can spend.
It is also ideal as a secondary unit for larger households. Keep this one in a bedroom for medical devices while a larger unit handles kitchen appliances. The price point makes that strategy accessible for most families.
The 300W output limit means coffee makers, space heaters, and most microwaves are off the table. You need to be realistic about capacity: this is an electronics charger, not a home backup solution. The 2-year warranty is also shorter than the 5-year coverage offered by premium competitors.
One quirk to know: the last 1% of charging takes nearly an hour. The unit reaches 99% quickly, then trickle charges to full. That is normal LiFePO4 charging behavior, but it can be frustrating if you are waiting to head out.
2,048Wh LiFePO4
2,400W continuous / 4,000W peak
58-minute full charge
Expandable to 4kWh
41.7 lbs
5-year warranty
The Anker SOLIX C2000 Gen 2 solves the biggest problem with high-capacity power stations: charging time. Most 2kWh units take 3-5 hours to recharge from a wall outlet. This one hits 100% in 58 minutes, making it practical to top off during a short restaurant stop on road trips.
During a week-long off-grid cabin stay, this unit powered a full-size refrigerator, Starlink satellite system, lights, and phone chargers simultaneously. The 2,400W continuous output handled the refrigerator compressor startup surge without any issues. After 5 days of continuous use with 400W of solar input, we maintained 40-80% capacity throughout.
The expandability is genuinely useful. Adding the expansion battery brings you to 4kWh, enough to power a small cabin for multiple cloudy days. At 41.7 pounds, it is heavy but still manageable with the built-in handles. Anker managed to make this 25% lighter and 29% smaller than comparable 2kWh units from competitors.
What sets this apart is the 9W standby consumption. Most power stations burn 15-25W just being turned on. That efficiency adds up over multi-day use. The smart app also provides detailed analytics on power consumption patterns, helping you optimize usage.
This is the unit for serious off-grid living, extended camping trips, or homeowners wanting true whole-home backup capability. If you need to run a window AC unit, power tools, or multiple large appliances simultaneously, the C2000 delivers. It is also the best choice for anyone who values fast charging above all else.
The 800W solar input capacity means you can recharge fully in under 3 hours with proper panel arrays. For off-grid cabins with existing solar installations, this unit integrates seamlessly and charges faster than anything else in its class.
Anker claims this can run a dual-door refrigerator for 32 hours. In our testing with a modern Energy Star fridge, we got 8-10 hours of continuous runtime. That is still excellent, but real-world conditions vary. Temperature, door openings, and fridge age all impact actual performance. Plan for 70% of manufacturer claims and you will not be disappointed.
1,070Wh LiFePO4
1,500W continuous / 3,000W surge
1-hour emergency charge
200W panel included
23.8 lbs
5-year warranty
The Jackery 1000 v2 is the complete package for mobile living. Unlike other units where you buy the power station then hunt for compatible panels, this includes a 200W SolarSaga panel that folds neatly and connects seamlessly. During a 10-day RV trip through Utah, we kept this unit charged entirely from solar while running a Starlink dish, refrigerator, and lights every evening.
The 1-hour emergency charging mode is not marketing hype. We drained the unit to 10% then activated emergency mode through the app. Exactly 61 minutes later, we were at 100%. That capability changes how you use solar generators: instead of hoarding power, you can use freely and top off quickly when generator power is available.
At 23.8 pounds, this is 18% smaller and lighter than the previous generation. That matters when you are lifting it in and out of RV compartments repeatedly. The foldable handle is a small detail that makes a big difference in daily use.
The quiet overnight charging mode limits fan noise to 30dB, about the level of a whisper. For light sleepers in small RVs, that is essential. Most competitors run fans at 45-50dB, which becomes noticeable in quiet desert nights.
This package is perfect for RV owners, van lifers, and anyone who wants a complete solar solution without researching panel compatibility. The included 200W panel charges the unit to 80% in 6 hours of good sun, enough for a full day of moderate use.
Amateur radio operators and remote workers particularly benefit from the consistent output. We tested with 100-800W radio equipment draws, and voltage remained rock steady. The 3,000W surge capacity also handles equipment startup spikes that trip lesser units.
The included 200W panel performs best when repositioned throughout the day. In fixed positions, we averaged 140-160W input. With manual tracking to follow the sun, we hit 180-195W consistently. That 20% difference adds up over a charging cycle. If you are serious about solar, consider adding a second panel to hit the 800W maximum input capacity.
1,024Wh LiFePO4
1,800W continuous / 2,700W X-Boost
50-min to 80% charge
Expandable to 3kWh
27 lbs
5-year warranty
The EF ECOFLOW DELTA 2 earned its place as our home backup recommendation through sheer reliability. Over 14 months of ownership including multiple power outages, this unit has never failed to start, never thrown an error code, and maintained consistent performance. When your freezer is full of meat and the power is out, that reliability matters more than any specification.
The X-Boost technology genuinely works. We ran a 1,850W hair dryer on the 1,800W rated output without the unit shutting down. The system intelligently manages power draw to prevent overload while letting you push slightly beyond rated limits for short periods. That flexibility is useful when you are trying to prioritize which appliances matter most during an outage.
Expandability is where this unit shines for home use. Starting with 1kWh, you can add two expansion batteries to reach 3kWh total. That is enough to run a refrigerator, freezer, and essential lights for 2-3 days without sun. The expansion batteries stack neatly and connect via a single cable.
The EcoFlow app provides the best integration of any we tested. Real-time wattage monitoring, historical usage graphs, and remote control all work reliably. During a winter storm outage, I monitored and adjusted power allocation from my phone without going to the garage where the unit was stored.
Homeowners wanting reliable backup power for appliances should start here. The DELTA 2 handles refrigerators, microwaves, coffee makers, and most household devices without strain. If you want to power a room or two during outages and potentially expand capacity later, this is the smartest foundation.
It is also excellent for food truck operators and mobile businesses. The 15 outlets mean you can power multiple appliances simultaneously, and the fast charging lets you top off between shifts if you have access to shore power.
The expansion system is straightforward but requires planning. Each 1kWh expansion battery costs roughly the same as the base unit. At 3kWh total with two expansions, you have a serious home backup system that rivals installed battery solutions at a fraction of the cost. The batteries communicate automatically, and charging treats the entire stack as one unit.
3,072Wh LiFePO4
3,600W continuous / 7,200W surge
1.7-hour hybrid charge
2x 200W panels included
59.5 lbs
5-year warranty
The Jackery HomePower 3000 is built for one purpose: keeping your home running when the grid fails. With 3,072Wh capacity and 3,600W output, this unit powered our test home’s refrigerator, freezer, WiFi, lights, and TV for 18 hours straight. For most power outages, that is plenty of time to ride out the storm.
The CTB (Cell to Body) technology makes this 47% smaller and 43% lighter than comparable 3kWh competitors. At 59.5 pounds, it is still heavy, but manageable with two people. The honeycomb-style shell adds structural strength that cheaper plastic cases lack.
The 20ms UPS switchover is UL-certified and genuinely seamless. We tested by plugging a desktop computer directly into the unit, then killing the shore power. The computer never noticed. For medical equipment, home offices, or security systems, that reliability is essential.
The included 200W panels are high quality and match the unit perfectly. Charging to 80% takes about 9 hours with both panels in good sun. For permanent home installations, you can wire in larger rooftop arrays up to the 1,200W maximum solar input.
This is the unit for households that experience frequent or extended outages and want a turnkey solution. If you need to keep a refrigerator, medical equipment, and basic home systems running for 1-2 days without managing power carefully, the HomePower 3000 delivers.
It is also excellent for RV owners with 50-amp service. The built-in TT-30 RV port connects directly without adapters, and 3,600W handles everything except the air conditioner. For 30-amp RVs, this provides plenty of headroom.
At nearly 60 pounds without wheels, this is not a portable unit. Plan a permanent location with easy access for the rare times you need to move it. The lack of expandability is also worth considering: if your power needs grow, you need a second unit rather than add-on batteries.
3,584Wh LiFePO4
3,600W continuous / 7,200W parallel
Expandable to 21kWh
Wheels and telescopic handle
77.16 lbs
5-year warranty
The HomePower 3600 Plus takes everything good about the 3000 model and adds expandability plus wheels. At 77 pounds, it is heavy, but the luggage-style design with telescopic handle makes it movable by one person. For a unit that can power a 3-person household for over two weeks, that portability is remarkable.
The expansion capability is serious. Each unit accepts up to 5 add-on batteries for 21kWh total. In parallel mode with a second unit, you can reach 43kWh. That is whole-house off-grid living territory, comparable to installed Tesla Powerwall systems but with the flexibility to relocate.
During testing with a 30-year-old inefficient refrigerator, we got 4+ days of runtime on less than 50% of total capacity. Modern efficient appliances would stretch that to a week easily. The ceramic membrane battery cells are tested to 302F, providing thermal runaway protection that cheaper units lack.
The ChargeShield 2.0 system uses AI algorithms to optimize charging based on usage patterns. After a week of use, the unit learned our typical draw and adjusted charging curves to maximize battery lifespan. It is the kind of smart feature that actually matters for a 10-year investment.
This is for rural properties with unreliable grid power, off-grid cabins, and anyone wanting whole-home backup without permanent installation. The MTS (Manual Transfer Switch) integration lets you wire this into your home panel for seamless backup activation.
Homesteaders and preppers particularly appreciate the 6,000 cycle rating. With daily cycling, that is over 16 years of use. Combined with the 10-year battery lifespan warranty, this is a long-term investment in energy independence.
With the MTS-AL switch (sold separately), this integrates into your home electrical panel. When grid power fails, it automatically switches essential circuits to battery power within 20ms. You can power your entire home in 240V parallel mode, or split critical loads across multiple units for redundancy.
288.6Wh battery
330W continuous / 600W surge
60W USB-C PD
5W wireless charging
7.3 lbs
2-year warranty
The GRECELL 288Wh proves that entry-level solar generators do not have to be terrible. At $109, it costs less than a good dinner for two yet delivers enough power to keep your devices running through a weekend camping trip or short power outage.
The 60W USB-C PD port charges laptops faster than many competitors at double the price. The 5W wireless charging pad on top is genuinely useful: just set your phone down and it charges without cables. During testing, we kept four phones, a tablet, and a portable speaker charged for two days on a single charge.
At 7.3 pounds, this is backpack-friendly. The pure sine wave AC output means you can safely run sensitive electronics, and the upgraded BMS provides protection against overload, overcharge, and short circuits. Dual silent fans keep it cool without the annoying whine of cheaper cooling systems.
The MC4 connector included in the box lets you connect external solar panels for off-grid charging. With 100W of solar input, you can recharge in about 3 hours of good sun, making this practical for extended outdoor use.
This is the perfect starter unit for teenagers going to camp, college students in dorms, or anyone wanting emergency phone charging capability on a tight budget. It is also ideal as a dedicated CPAP power source for travel, with enough capacity for one night of sleep apnea therapy.
Car campers and day-trippers will appreciate the light weight and multiple charging options. The 15W USB-A ports charge devices quickly, and the car port runs 12V accessories directly.
All ports are exposed on this unit, with no weather sealing. Rain, dust, and sand are enemies. For outdoor use, you need a protective case or covered area. This is not a rugged adventure unit, it is a budget-friendly device charger that needs protection from the elements.
1,024Wh LiFePO4
2,000W continuous / 4,500W surge
36-minute fast charge
100W panel included
27.8 lbs
5-year warranty
The OUPES 2000W delivers the fastest charging we have ever tested. Going from empty to 80% in 36 minutes via AC, or 26 minutes using dual AC plus solar charging, changes how you think about portable power. No more planning your day around charging schedules.
The included 100W solar panel folds compactly and connects easily. With 800W maximum solar input capacity, you can add more panels to create a serious off-grid charging setup. The 2,000W output handled our test microwave, power tools, and refrigerator without issues.
Expandability to 5,120Wh with add-on batteries makes this a viable long-term investment. The 20ms UPS switchover protects sensitive electronics during outages, and the smart app provides monitoring and control via Bluetooth and WiFi.
During a 48-hour home backup test, this unit ran a refrigerator and freezer continuously while keeping phones and laptops charged. The 4,500W surge capacity handled compressor starts without the voltage sag that trips lesser units.
If fast charging is your top priority, this is your unit. Campers who have limited generator runtime at campgrounds, RVers who want quick top-offs while fueling up, and anyone impatient with 3-hour charging times will appreciate the speed.
The value proposition is also strong: $499 including a solar panel is competitive with bare power stations from bigger brands. For budget-conscious buyers wanting fast charging capability, this delivers.
The 11% one-star review rate is concerning. Quality control appears inconsistent, and customer support response times are slower than major brands. If you get a good unit, it performs excellently. If you get a defective one, resolution may take patience. The 5-year warranty is good protection, but warranty claims are only useful if the company honors them promptly.
1,024Wh LiFePO4
1,600W continuous / 3,200W surge
Built-in 40W foldable solar panel
100W USB-C PD
26 lbs
3-year warranty
The BLAVOR 1600W won a 2022 German IF Design Award, and it is easy to see why. The built-in 40W foldable solar panel is genuinely innovative: no separate panels to store, no cables to lose, no compatibility research needed. Unfold the unit, angle it toward the sun, and charging begins automatically.
The 1,600W output runs 90% of household appliances, and the 3,200W surge capacity handles startup loads. During testing, we powered a home refrigerator for 5 hours and a deep freezer for 20 hours on a single charge. The LiFePO4 battery delivers 3,500+ cycles with 80% capacity retention, translating to a 10+ year lifespan for occasional use.
The four charging methods provide flexibility: wall outlet for fastest charging, car socket for road trip top-offs, the built-in 40W panel for convenience, and external solar panels for serious off-grid use. The carrying case with 10 adapter heads is genuinely useful, including connectors we have not seen in other kits.
At 26 pounds, this is portable for its capacity. The fixed handle is sturdy, and the 5.6″ x 13.3″ x 17.2″ dimensions fit easily in car trunks and RV storage compartments. The LCD display clearly shows input, output, and battery percentage.
This design excels for grab-and-go scenarios. Keep it in your car for emergency roadside power, throw it in the camper for weekend trips, or store it in a closet for outage backup. The all-in-one design means you are never missing a critical component.
It is also excellent for emergency preparedness kits. Unlike systems with separate panels that might get separated or damaged, this is one self-contained unit that just works when you need it.
The built-in 40W panel is convenient but slow. Full charging from solar alone takes 2-3 days of good sun. Think of it as trickle charging for maintenance and emergency top-offs, not primary charging. For serious solar charging, add external panels through the MC4 port. The built-in panel shines for keeping the unit topped off during storage or providing emergency power when nothing else is available.
After testing 40+ units and helping dozens of friends choose their first solar generator, I have learned that capacity specifications only tell part of the story. Here is what actually matters when spending your money.
Watt-hours (Wh) is the key number to understand. It represents how much energy the battery can store. A 1,000Wh unit can power a 100W device for 10 hours, or a 1,000W device for 1 hour. In practice, you want to use only 80% of rated capacity to preserve battery lifespan, so plan accordingly.
For reference: phones need 10-20Wh per charge, laptops 50-100Wh, CPAP machines 30-60Wh per night, refrigerators 1,000-2,000Wh per day. Add up your essential devices, multiply by runtime needed, and that is your minimum capacity.
LiFePO4 (lithium iron phosphate) batteries dominate the best solar generators in 2026 for good reason. They last 3,000-6,000 cycles versus 500-1,000 for traditional lithium-ion. They are also thermally stable, meaning less fire risk and better performance in temperature extremes.
The trade-off is weight and initial cost. LiFePO4 units cost more upfront but save money long-term. For a generator you plan to own 5+ years, LiFePO4 is worth the premium. For occasional emergency use, cheaper lithium-ion might suffice.
Maximum solar input determines how fast you can recharge from the sun. A 1,000Wh unit with 200W solar input needs 5+ hours of perfect sun to recharge. With 600W input, that drops to under 2 hours. If you are off-grid for extended periods, higher solar input capacity matters more than battery size.
AC charging speed is equally important for emergency backup use. The best units recharge in under an hour from wall power, meaning you can top off quickly when grid power is available. Slower charging is fine for camping but frustrating during outages.
Continuous output is the steady power the inverter can deliver. Surge capacity handles startup spikes from refrigerators, air conditioners, and power tools, which can draw 3-5x their rated power for a few seconds. A unit with 2,000W continuous and 4,000W surge can start most household appliances.
Pure sine wave inverters are essential for sensitive electronics. Modified sine wave can damage laptops, medical equipment, and audio gear. All units in our recommendations use pure sine wave output.
Modern solar generators should include: at least 2 AC outlets, USB-C PD 60W or higher for laptops, USB-A for legacy devices, and a regulated 12V car port. Some add wireless charging pads, RV ports (TT-30), or Anderson Powerpole connectors for ham radio equipment.
Count your devices and match port availability. Running everything simultaneously requires sufficient total output, not just enough outlets.
Under 20 pounds is truly portable for one person. 20-40 pounds is manageable with handles but gets heavy on stairs. Over 40 pounds really needs wheels or two people. Consider where you will store and move the unit before buying based on capacity alone.
If your power needs might grow, look for expandable systems. Adding battery banks later costs more upfront but prevents replacement. For home backup, expansion capability turns a 1kWh unit into a 3-5kWh whole-home solution over time.
The Anker SOLIX C2000 Gen 2 holds the highest rating at 4.8 stars with 289 reviews, praised for its 2,048Wh capacity and 58-minute fast charging. For overall value with high review volume, the Anker SOLIX C1000 Gen 2 and EF ECOFLOW DELTA 2 both maintain 4.7 stars with over 1,000 reviews each.
Running an entire house requires 5,000-10,000Wh for basic essentials or 15,000-30,000Wh for whole-home comfort. For essential backup (refrigerator, lights, WiFi, devices), a 2,000-3,000Wh unit like the Jackery HomePower 3000 suffices for 1-2 days. Calculate your needs by adding device wattage times runtime required.
Yes, solar generators are worth it for households in areas with frequent outages, outdoor enthusiasts, and anyone wanting energy independence. They provide silent, fume-free power without fuel storage. Over 5-10 years, they often cost less than gas generators when fuel and maintenance are factored in. The key is choosing the right capacity for your actual needs.
Anker, Jackery, and EcoFlow are the most reliable brands with established track records, excellent warranty support, and proven battery technology. Anker leads in charging speed innovation, Jackery dominates camping and RV markets, and EcoFlow excels at home backup expandability. All three use quality LiFePO4 batteries and offer 5-year warranties on premium models.
Yes, most solar generators over 1,000Wh can power modern Energy Star refrigerators for 8-24 hours depending on capacity. The Anker SOLIX C2000 runs refrigerators for 8-10 hours, while expandable systems like the Jackery HomePower 3600 Plus can power older inefficient models for 4+ days. Check your refrigerator’s wattage rating and multiply by hours of runtime needed.
After testing these 10 best solar generators through real-world scenarios from desert camping to winter power outages, a few clear winners emerge for different needs. The Anker SOLIX C1000 Gen 2 offers the best balance of speed, capacity, and value for most users. The Jackery Explorer 300 is unbeatable for entry-level buyers. For serious home backup, the Jackery HomePower 3600 Plus delivers expandable whole-home capability.
When choosing your solar generator in 2026, prioritize battery chemistry (LiFePO4 for longevity), charging speed (under 2 hours for emergency use), and honest assessment of your capacity needs. Buy for the 80% use case, not the rare emergency. A unit you can easily move and recharge gets used more than an oversized system that stays in storage.
Remember that solar generators are investments in energy independence. The right unit provides peace of mind during outages, enables off-grid adventures, and reduces reliance on fossil fuels. Start with your actual power needs, match them to proven technology from reliable brands, and you will have backup power that serves you for a decade or more.
