--- product_id: 101034597 title: "POWEROAK 400Wh Portable Power Solar Generator Lithium ion power supply for Emergency Camping backup power source with 300W DC/AC Power Inverter,12V Car DC/AC/USB Outputs, Charged by Solar Panel/AC/Car" brand: "poweroak" price: "Β₯36657" currency: JPY in_stock: false reviews_count: 8 url: https://www.desertcart.jp/products/101034597-poweroak-400wh-portable-power-solar-generator-lithium-ion-power-supply store_origin: JP region: Japan --- # 400Wh Power Capacity Solar Rechargeable Samsung Lithium Ion Battery POWEROAK 400Wh Portable Power Solar Generator Lithium ion power supply for Emergency Camping backup power source with 300W DC/AC Power Inverter,12V Car DC/AC/USB Outputs, Charged by Solar Panel/AC/Car **Brand:** poweroak **Price:** Β₯36657 **Availability:** ❌ Out of Stock ## Summary > πŸ”‹ Power Up Your Adventures with POWEROAK! ## Quick Answers - **What is this?** POWEROAK 400Wh Portable Power Solar Generator Lithium ion power supply for Emergency Camping backup power source with 300W DC/AC Power Inverter,12V Car DC/AC/USB Outputs, Charged by Solar Panel/AC/Car by poweroak - **How much does it cost?** Β₯36657 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/101034597-poweroak-400wh-portable-power-solar-generator-lithium-ion-power-supply) ## Best For - poweroak enthusiasts ## Why This Product - Trusted poweroak brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Eco-Friendly Energy:** Harness the sun with solar charging capabilities. - β€’ **Smart Safety Features:** LCD display for real-time battery monitoring. - β€’ **Lightweight & Portable:** Weighing only 12.3 lbs, take your power on the go. - β€’ **Power Anywhere, Anytime:** Unleash 300W of pure power for all your devices. - β€’ **Versatile Charging Options:** Charge via AC, DC, or solar for ultimate convenience. ## Overview The POWEROAK 400Wh Portable Power Solar Generator is a versatile and eco-friendly power solution, perfect for camping, emergency backup, or job sites. With multiple charging options, a lightweight design, and advanced safety features, it ensures you stay powered wherever life takes you. ## Description Product Description FAQ Q1: What devices can PS5B power? A: Please note that the AC output port can only charge/power devices that operate at less than total 300 Watt. Q2: How long does it take to full charge this power station? A: Working time (estimation) =400Wh* 0.85 / operating power of your device. (0.85=Conversion Rate) Please note that the actual working time may vary under different situations. Q3: Does PowerOak PS5B include a built-in MPPT controller? A: All PowerOak power stations have a built-in MPPT controller. Stay Powered by Your Car The PS5B features a 12V/10A car port for in-car devices like car refrigerator, air compressor, or portable outdoor shower, bringing you an off-grid life for the next RV trip. If you have enough fuel, you can also use the cigarette lighter receptacle of your car to charge PS5B while driving. 300W Pure Sine Wave AC Output The PS5B produces pure sine wave AC output to power your devices, protecting them from undesired interference, excess heat. PS5B is ideal for sophisticated devices like CPAP machine, high-end speaker system and computers. The continuous output power is up to 300W, which is quite enough for most small appliances. What’s in the box 1 * Portable Power Storage(PS5B) 1 * AC wall charger 1 * car charging cable 1 * solar charging cable 1 * jump starter alligator clip cable 1 * user manual 1 * message card Portable Power Station on PS5B This is PowerOak PS5B 400wh portable power generator, a portable power station with battery capacity of 400Wh, 300W pure sine wave outputs, 2 AC wall outlet Charge, and 3 ways of recharging (solar / wall / car). Portable and Easy to Carry 5.Weight:12.3LB , Size:9*5.5*9.2IN Can PPS be chained together to provide more storage? ....Can not. Never charge the PPS with solar charge and AC charge at the same time. Please use Solar Charging Port not Adapter Charging Port to charge the 400Wh Power Station when you use Solar Panel to charge it. Compatible with most devices(under 300wh) in our daily life 2*AC output ports can charge small home appliances ,laptops,CPAP machines,etc. 4*USB outputs port can charge your cell phones,wireless router, security camera , headlamps , fans and more. No adapters are needed. 2* DC Output ports can charge LED lamp or other devices Review: Every home should have one - After yet another rare but wholly unexpected power cut that ruined an entire evening's planned TV viewing, I decided to research back-up generators. The Poweroak 400 stood out above the competition due to its small size, versatility and relatively large battery capacity. I raised a technical question with the helpful supplier who responded with half an hour, placed my order and only two days later the device arrived. First impression was how compact and light it is which means that storage is not an issue. I activated the master power button then subsequently ran several short tests that included individually running my 42" LED TV then a pair of CD players, all via the two AC outputs before charging my tablet through the USB sockets. The TV and CD players operated as if connected to the grid and the tablet charged as normal. Power drawn was accurately shown on the LCD displays except when running the smaller CD player that has a rating of less than 20 watts and displayed zero consumption. Recharging was undertaken via the mains charger supplied, again after activating the master power button. (otherwise excellent instructions omit this requirement) I noted that the 48 watt initial charge tapers down to 9 watts for the last hour before charging automatically ceases. My short tests confirm that the Poweroak 400 is exactly what I need as it will run my TV for at least five hours as well as recharging my tablet and powering my router during these annoying power outages. Whilst the mains charger is probably all that most householders would ever use, I do intend to buy a 100 watt PV solar panel to give an optional method of recharging in case of extended supply losses. The instructions confirm that Poweroak has a built-in control circuitry for this purpose. In conclusion, this is a versatile and sophisticated charger that can provide a wide range of functions in addition to those I tested, such as jump-starting a car or being recharged by a vehicle's cigarette socket. The Poweroak 400 is ideal for camping, motor homes and as a domestic mains back-up within the limits of a 400 watt-hour battery. Every home should have one. Update on 10th May 2022. As I was so impressed with the first Poweroak which has seen me through a number of mains outages during the last 4 years, I have bought a second one from the same seller. It arrived a week ahead of schedule and was beautifully packaged as its predecessor, which still looks and works as new. Review: The Tesla of Generators! - OK, so I'll admit that I'm a PowerOak fan. I love their stuff. I travel with it and they've treated me extremely well despite the abuse I put them through.We all want power. We all want to watch tv at the tailgate and with that we have to have power. This usually means lugging a heavy, noisy, gas sucking generator out to the tailgate. That has never been my favorite thing to do, but now there is an easier way with what I call the Tesla of generators. The PowerOak 400wh power generator is a solar powered generator ready to take your tailgate to a cleaner and greener level. It can gives you outdoor portable power that can help power lights, phones, laptops, TVs, blenders and much more. It sports features such as surge protection, short circuit protection, temperature control and pure sine wave. To get started you simply charge the generator up at home, as it is essentially a large power station that can store the power and then output it to a variety of energy thirsty products. There is a battery % indicator, along with Input Watts and Output Watts on the digital display panel. The PowerOak powerhouse has 4 USB outputs and 2 AC output to push the power to your devices. When I saw that this had been released, I decided I needed one. Last fall I moved to New England, and over the winter had several friends lose power as a result of winter storms. I decided this would make a decent stand-in until I could decide if I need a real generator or not. I was also planning to use it for camping, tailgating, and the like. Since I'm planning to use this in an emergency, I thought I should put it through it's paces a bit to make sure it wasn't going to leave me high and dry. The first thing I did when it got to my house was plug it in to charge. I'm not sure how long it took; I just left it overnight. The next day, I took it out and started playing with it. I started out easy- I set it out at a BBQ and let people use it to charge phones and whatnot. Then I started ramping things up a bit, and used it to power a boom box. shop light, some string lights on the patio, and then (just to see if we could) a box fan that was in the mud room. The fan was a bit much- while it did run, it wasn't quite as fast as when plugged into the wall, so we decided that was probably the limit. Still, and impressive unit. Over the next week, my wife used it constantly to charge her phone and other small things. I never plugged it back in for a recharge in the entire week. I had originally planned this for emergency power, and boy does it deliver. I also went ahead and ordered the solar panel, but haven't played with that one yet. I'll write something up on it when I do. I've included a few pics, but the bottom line is this: this thing is absolutely worth it. ## Features - POWEROAK PROVIDE clean, quiet portable power;perfect for the campground yet powerful enough for the job site.Inverter generators deliver stable,pure sine wave AC output,reliable enough to power even the most sensitive electronic equipment.A high-efficiency combustion system produces exceptionally low emissions making these generators environmentally friendly.It is lightweight,designed for portability.The convenient carry handle makes them easy to take along where ever you need portable power - 2.MULTI RECHARGE WAY: Power from a 12V/24V car, AC wall outlet and solar panel,Easily powered from AC wall Outlet, DC car charger or compatible solar panel (Input Voltage must be 14V～40V,like 18V,36V,etc.Especially recommend the PowerOak 120W Flexible PV Solar Panel with Adhesive Back)Can power any USB/5V, DC/12V and AC appliance under 220Wh300W anywhere. Widely used for indoor or outdoor such as family, office, travel, camping, etc. - 3.SATETY & LCD POWER DISPLAY: Built in Samsung lithium ion battery cell. LCD battery display indicate the remaining capacity, charge, discharge and failure status. Once it is fully charged, all battery segments will be lit and remain solid. It will stop charging battery by the built in advanced system control circuit modu - 4.WEIGHT only 12.3 LB.Smaller size only 9*5.5*9.2 IN.More weight lighter, longer lifespan, safer, Environmental -friendly and portable than other competitor's lead-acid big heavy one. - 5.WHAT YOU GET: 1 * Portable Power Storage(PS5B), 1 * AC wall charger, 1 * car charging cable, 1 * solar charging cable, 1 * jump starter alligator clip cable, 1 * user manual, 1 * warranty card ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07N423HLH | | Best Sellers Rank | 195,289 in Garden ( See Top 100 in Garden ) 294 in Outdoor Generators | | Brand | POWEROAK | | Brand Name | POWEROAK | | Colour | Ps5b | | Customer Reviews | 4.2 out of 5 stars 114 Reviews | | Engine Power Maximum | 300 Watts | | Engine Type | 4 Stroke | | Frequency | 60 Hz | | Fuel Type | Solar | | Fuel type | Solar | | Ignition System Type | Electronic | | Included Components | Battery | | Is Electric | Yes | | Item Dimensions L x W x H | 23.4L x 14W x 22.9H centimetres | | Item Weight | 7.5 Kilograms | | Item weight | 7.5 Kilograms | | Manufacturer | kayomaxtar | | Manufacturer Part Number | PS5B-UK | | Model Number | PS5B-UK | | Output Wattage | 300 Watts | | Power Source | Solar Powered | | Power source | Solar Powered | | Recommended Uses For Product | Camping | | Recommended uses for product | Camping | | Running Wattage | 300 Watts | | Runtime | 1 hour | | Special Features | Portable | | Starting Wattage | 7.2E+3 Watts | | Total Power Outlets | 2 | | Voltage | 230 Volts (AC) | | Wattage | 400 Watt-hours | ## Product Details - **Brand:** POWEROAK - **Wattage:** 400 Watt-hours - **Fuel type:** Solar - **Power source:** Solar Powered - **Recommended uses for product:** Camping - **Item weight:** 7.5 Kilograms - **Voltage:** 230 Volts (AC) - **Output wattage:** 300 Watts - **Special feature:** Portable - **Included components:** Battery ## Images ![POWEROAK 400Wh Portable Power Solar Generator Lithium ion power supply for Emergency Camping backup power source with 300W DC/AC Power Inverter,12V Car DC/AC/USB Outputs, Charged by Solar Panel/AC/Car - Image 1](https://m.media-amazon.com/images/I/61SW1Qph4sL.jpg) ![POWEROAK 400Wh Portable Power Solar Generator Lithium ion power supply for Emergency Camping backup power source with 300W DC/AC Power Inverter,12V Car DC/AC/USB Outputs, Charged by Solar Panel/AC/Car - Image 2](https://m.media-amazon.com/images/I/81vHhaTb-ZL.jpg) ![POWEROAK 400Wh Portable Power Solar Generator Lithium ion power supply for Emergency Camping backup power source with 300W DC/AC Power Inverter,12V Car DC/AC/USB Outputs, Charged by Solar Panel/AC/Car - Image 3](https://m.media-amazon.com/images/I/51yR9nUHBrL.jpg) ![POWEROAK 400Wh Portable Power Solar Generator Lithium ion power supply for Emergency Camping backup power source with 300W DC/AC Power Inverter,12V Car DC/AC/USB Outputs, Charged by Solar Panel/AC/Car - Image 4](https://m.media-amazon.com/images/I/71pEQgEbPgL.jpg) ![POWEROAK 400Wh Portable Power Solar Generator Lithium ion power supply for Emergency Camping backup power source with 300W DC/AC Power Inverter,12V Car DC/AC/USB Outputs, Charged by Solar Panel/AC/Car - Image 5](https://m.media-amazon.com/images/I/81wqARf4OBL.jpg) ## Questions & Answers **Q: how long would this run a 12v/240v caravan tv for** A: It's got an advertised capacity of 500Wh, if your tv draws 50W then it'll do 10 hours. **Q: To the seller, please confirm that the uk version i've just ordered has a 230v output rather than the usa's version at 110v.** A: hello valued buyer, Yes,it's the UK version which is 230v output,sorry for the misleading information of the A+ page,we have updated it,while amazon will takes some time to ajust it. thanks, Niki **Q: How many ways can i charge this powerhouse?How should i choose a suitable solar panel?** A: You can charge it with a solar panel of up to 120 watts. You will need to buy a pair of extension cables as the one that come with this are about 12” long,and the ones connected to your solar panel will be shorter.Just connect the m/f and f/m to the battery cable and to the solar panel.You don’t need anything in between as it’s built in. The sun must be shining and your poweroak turned on before it will charge.Sounds straight forward but no one explained this to me and someone even said he could not find the cables to connect it,which is complete rubbish,and made me decide to ask for a refund,which I have since cancelled. Hope this helps.BTW I have it connected to a renogy flexible 100 watt panel.Also a renogy tool for releasing the clips or long nose pliers as they are to small and stiff to release with your fingers. **Q: if for my freezer of 228w is it okay to use it, how long can the power last? 1 ,2 4 hours?** A: How long this power station can power your freezer mainly depends on the power consumption of your freezer. You can check the specification of your freezer or consult the freezer seller to get the freezer's daily power consumption in the unit of KWh (kilowatt hour). Then you can calculate how long our solar generator can power your freezer. For example, we have checked that a houshold freezer with rated power of 140W usually consumes about 0.85KWh / 850Wh energy in 24 hours - in other words, it consumes about 0.035KWh / 35Wh energy per hour. Considering the depth of discharge (DOD) of the battery and the conversion efficiency of the inverter (total about 80%), the actual usable battery capacity of our AC50S 500Wh power station is about 400Wh. So the AC50S power station can power the above mentioned 140W freezer for about 11 hours: 400Wh Γ· 35Wh = 11. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Every home should have one *by B***N on 4 May 2019* After yet another rare but wholly unexpected power cut that ruined an entire evening's planned TV viewing, I decided to research back-up generators. The Poweroak 400 stood out above the competition due to its small size, versatility and relatively large battery capacity. I raised a technical question with the helpful supplier who responded with half an hour, placed my order and only two days later the device arrived. First impression was how compact and light it is which means that storage is not an issue. I activated the master power button then subsequently ran several short tests that included individually running my 42" LED TV then a pair of CD players, all via the two AC outputs before charging my tablet through the USB sockets. The TV and CD players operated as if connected to the grid and the tablet charged as normal. Power drawn was accurately shown on the LCD displays except when running the smaller CD player that has a rating of less than 20 watts and displayed zero consumption. Recharging was undertaken via the mains charger supplied, again after activating the master power button. (otherwise excellent instructions omit this requirement) I noted that the 48 watt initial charge tapers down to 9 watts for the last hour before charging automatically ceases. My short tests confirm that the Poweroak 400 is exactly what I need as it will run my TV for at least five hours as well as recharging my tablet and powering my router during these annoying power outages. Whilst the mains charger is probably all that most householders would ever use, I do intend to buy a 100 watt PV solar panel to give an optional method of recharging in case of extended supply losses. The instructions confirm that Poweroak has a built-in control circuitry for this purpose. In conclusion, this is a versatile and sophisticated charger that can provide a wide range of functions in addition to those I tested, such as jump-starting a car or being recharged by a vehicle's cigarette socket. The Poweroak 400 is ideal for camping, motor homes and as a domestic mains back-up within the limits of a 400 watt-hour battery. Every home should have one. Update on 10th May 2022. As I was so impressed with the first Poweroak which has seen me through a number of mains outages during the last 4 years, I have bought a second one from the same seller. It arrived a week ahead of schedule and was beautifully packaged as its predecessor, which still looks and works as new. ### ⭐⭐⭐⭐⭐ The Tesla of Generators! *by A***A on 3 March 2019* OK, so I'll admit that I'm a PowerOak fan. I love their stuff. I travel with it and they've treated me extremely well despite the abuse I put them through.We all want power. We all want to watch tv at the tailgate and with that we have to have power. This usually means lugging a heavy, noisy, gas sucking generator out to the tailgate. That has never been my favorite thing to do, but now there is an easier way with what I call the Tesla of generators. The PowerOak 400wh power generator is a solar powered generator ready to take your tailgate to a cleaner and greener level. It can gives you outdoor portable power that can help power lights, phones, laptops, TVs, blenders and much more. It sports features such as surge protection, short circuit protection, temperature control and pure sine wave. To get started you simply charge the generator up at home, as it is essentially a large power station that can store the power and then output it to a variety of energy thirsty products. There is a battery % indicator, along with Input Watts and Output Watts on the digital display panel. The PowerOak powerhouse has 4 USB outputs and 2 AC output to push the power to your devices. When I saw that this had been released, I decided I needed one. Last fall I moved to New England, and over the winter had several friends lose power as a result of winter storms. I decided this would make a decent stand-in until I could decide if I need a real generator or not. I was also planning to use it for camping, tailgating, and the like. Since I'm planning to use this in an emergency, I thought I should put it through it's paces a bit to make sure it wasn't going to leave me high and dry. The first thing I did when it got to my house was plug it in to charge. I'm not sure how long it took; I just left it overnight. The next day, I took it out and started playing with it. I started out easy- I set it out at a BBQ and let people use it to charge phones and whatnot. Then I started ramping things up a bit, and used it to power a boom box. shop light, some string lights on the patio, and then (just to see if we could) a box fan that was in the mud room. The fan was a bit much- while it did run, it wasn't quite as fast as when plugged into the wall, so we decided that was probably the limit. Still, and impressive unit. Over the next week, my wife used it constantly to charge her phone and other small things. I never plugged it back in for a recharge in the entire week. I had originally planned this for emergency power, and boy does it deliver. I also went ahead and ordered the solar panel, but haven't played with that one yet. I'll write something up on it when I do. I've included a few pics, but the bottom line is this: this thing is absolutely worth it. ### ⭐⭐⭐⭐ Good Battery - USB Ports Break Easily *by A***R on 9 April 2026* This is a good battery and works well, it's also small enough to fit into smaller spaces. It's only real drawback is that the USB ports on the front break easily. They are dual USB ports and the plastic gat between the ports is brittle, so it easily gets cracked and broken if the USB cable is plugged into the battery and gets jogged even a small amount. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/101034597-poweroak-400wh-portable-power-solar-generator-lithium-ion-power-supply](https://www.desertcart.jp/products/101034597-poweroak-400wh-portable-power-solar-generator-lithium-ion-power-supply) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-14*