i ordered this battery expecting it to get a constant output of 12 volts at least 10 amps for my astrophotography. during my sessions the volts will drop down to below 11 and my equipment will shut down. the battery is completely full when this is happening so this is an issue with the unit itself. i would think that this battery would be able to power a 12-volt 10 amp system and it's far from being able to do that. unfortunately i may have to return this because the only way to power my equipment is to use the ac portion of the battery which waste electrical charge while converting from dc to ac.

upon receiving this and reviewing the instruction manual i could tell this was not the right product for me. it requires being used ev so often to keep the battery functioning and that’s a hassle. also, it does not offer very much power. having just gone thru hurr. beryl and no lights i can tell i need something more powerful. it’s inexpensive and that’s good. but just not enuf ooomph for me and what we need. i will be returning this for something else.

the solar panel puts out 45w+ under full sun, which is quite good for a 60w-rated portable folding panel -- no complaints there. the biggest plus for the power station is that it's very lightweight and portable; at only 5lb and less than 4 thick, it's thinner and lighter than similar 300w / 280wh class portable power stations. the 300w-rated pure sine wave ac inverter works well; i was able to power a rice cooker at 311w (per my kill-a-watt) without issues, with ac output holding steady at 114v and 60hz. (for testing power station ac output ratings, a purely resistive load like a rice cooker, electric kettle or incandescent light bulb must be used -- that is, nothing with electric motors.)however, i'm disappointed at the dc input / output performance. the 12-23v charge port is limited to maximum of 2.4 amps, meaning it takes over 8 hours to fully charge the internal 280wh battery from empty when using the included 15v ac adapter (and not much less when using the included solar panel). there are 4 usb ports, though not one is a usb-c. at least one usb-c port with some type of fast charging is mandatory in this day and age, in my opinion. the 12v dc output voltage isn't regulated, and the voltage starts at only ~12.4v (when the power station is fully charged), and slowly deflates as the internal battery discharges until it goes down to 9-10v. this output voltage is too low and can cause many 12v dc-powered devices to complain, underperform, misbehave or downright stop working. the led lamp at the back works well, but the light output is underwhelming. the dc input output ports are identical (both dc5521) and sit about an inch apart from each other, which can easily cause user confusion. on the plus side, the 12v dc output is rated for 10a max, which is not bad.bottom line, the small size, light weight and competent ac output of this power station redeems itself well for occasional light-duty camping / work site use with low-powered devices, but the slow charging, lack of usb-c and disappointing dc output performance keeps me from recommending it without reservation, especially given the price.

i originally got this to pair with a 100w foldable solar panel to use on the beach. the problem with that is, all of my 100w panels output at 5a, where this generator has a max input of 2.4a. i may cautiously try it, we'll see. the inluded wall charger is only 36w, so it takes a very long time to charge this large of a battery bank (75000mah according to the literature). the manual is scant on technical details, but the product page does mention that it has a bms built in, over voltage/current protection, and overload protection. it does have an 'intelligent' fan that only comes on when the unit gets warm enough. the display is not of much use other than to display battery charge (not in percent - just with bars), and which outputs (ac/dc) are turned on. in other words, you don't know the amount of current coming in or going out. it is a true pure sine wave inverter and i read just over 111vac at the outlets. it has 4 usb outlets, but they are all usb-a. at this price point, i think it wouldn't be asking for too much to have at least one usb-c. comes with a dc5521 to auto lighter adapter as well as a auto lighter charging cord. the light is on the opposite side of the display and has one brightness level, strobe, and sos. bright enough to light up a tent or to change a tire in the dark. as far as performance, it will power a 12v mini fridge for 8-10 hours if it's pre-cooled on ac, and a mid-range laptop for about 4 hours. it is light and compact, so that's a good thing. i don't hate it, but i wouldn't get another one, either. there are more feature-rich options available in the same price range. the current promotion ($80 off) puts the price more in line with what it should be without a promotion. it has potential, but still needs some refining. 3/5 stars.

so, this thing would be pretty sweet if it came anywhere close to the listed specs.... i love the form factor, it's a nice size...but performance wise, this is hot garbage! don't buy this unless you can get it for maybe 50 dollars.--not 300 watts ac! not pure sine wave!one thing you will notice is the ac output says 300 watts max. when something says xxx watts ac max, that figure is basically meaningless. the only meaningful figure is the continuous output. and for this little jewel that number is less than 100.i have a 15 watt wi-fi router, and it runs that fine with the ac adapter...i have a laptop with a 300 watt dock/power supply (but the laptop only draws 100 watts max when the dock isn't engaged (just pass-through power). when this battery is fully charged, it can barely power my laptop (which generally draws about 30 watts. the laptop becomes glitchy and almost unusable. i quickly unplugged my laptop and i hope it didn't damage it.so basically, what i could determine from this is that this thing provides < 100 watts continuous, and it clearly isn't a pure sine wave either. it can handle a 15 watt adapter, and that's about it.--dc doesn't worki tried plugging in a car cigarette lighter pd adapter, and also i tried charging a portable air compressor using the 12v dc port (again with fully charged battery pack). the usb pd adapter made the battery pack glitch and turn off instantly (with no load plugged into the adapter). the portable air compressor did nothing.--not mppti plugged this into a 5 amp 20v solar panel (which is high quality and works very well). i measured the voltage and current several times... so evidently the maximum power point according to this thing is...13 volts and 2.4 amps. that's all it ever measured.so... like that's not the maximum power point, by my calculations... that's about 30 watts from a 100 watt solar panel. (and this panel delivers 100 watts in full sun). even if the voltage was held to 13 volts, i would understand.. batteries have certain charging requirements, but the current should have been 5 amps in full sun. pathetic.