Looking for a power source to keep a mobile refrigerator on during travel I reviewed numerous possibilities and Jackery was in the forefront as a respected and well known brand. The Explorer 300 Plus had the capacity I needed to power the refrigerator for the few hours I needed, or so I thought …Very light, very small both immediately struck me when unboxing this. For its size it packs a punch. It’s well built, solid feel …My Experience using this …My plan was to plug the power station into either my vehicle 12v socket or the vehicles onboard 120vac plug to charge while driving. The portable refrigerator I was using would be plugged into the power station’s 12v port as it made no sense to up convert to AC, then back down to 12vdc that the refrigerator accepts. While driving the power station would be charging (being kept charged) while the refrigerator was running. When stopped, the power station would continue powering the refrigerator until I returned.This is where the first issue surfaced. The power station seemed to charge ok until it was fully charged, at which time it stopped charging and drained until shutoff. My refrigerator was plugged into the 12vdc port of the power station at the time. The manual clearly stated this could be used as an EPS (emergency power source) with pass-thru … powering and charging at the same time. A phone call to Jackery support reveals that for this to work, a 12vdc source must be used to charge if you’re powering a device by 12vdc port, the same applies to charging via the 120vac and powering device via 120vac.Ok, not ideal … but now that I know how I can work with it I’ll use the vehicles 12vdc power to charge the Jackery. Through some experimentation I also discovered that having *any* device plugged into the 120vac port will keep the 12vdc port powered as well, an acceptable workaround allowing me to use the 120vac plug in the vehicle to charge the Jackery while driving.UPDATE: It seems that having the AC section simply turned on, with the minuscule amount of idle current that it draws, is enough to trigger the “pass-thru charging” and keep the 12vdc port on as well, with an unnoticeable impact on battery life.So I started “testing” powering the refrigerator and to my surprise I could run the refrigerator for almost 12 hours on ECO mode from the 12vdc port when fully charged, which is pretty awesome for this diminutive power station.The next issue I encountered is that the unit shuts down after a period of time. I soon discovered that is changeable in the app, as a number of things that I couldn’t seem to change any other way are.This leads me to my final, and perhaps biggest gripe of all … you can pair the app to work via bluetooth, or over wifi (cloud), but not both. Initially I chose wifi, but upon thinking about that choice later I figured when in the car I have no wifi for the power station, so this isn’t going to work. No problem, re-paired via bluetooth. Bluetooth, however, seems to disconnect after a short-ish period of time and no amount of restarting the app forces a re-connection. To reconnect you have to hold the DC and AC buttons to force re-pairing on the power station, and then you can connect via app. This is a problem as I want to have the ability on long drives to determine whether this is still on, charged, running the refrigerator.I was considering returning the power station at this point, but decided due to the low cost, size/power, and build quality that I would commit to keeping it. I’m hopeful that the bluetooth issues can be resolved via firmware update at some point. If not, and as time pass and I can rely on the unit to charge and stay powered on I may not need that functionality as much anyway.If solid power in a small package is your main concern, this may be the best option on the market currently. There are a few lesser known options that are attempting to build the reputation Jackery has already achieved that may be suitable as well.