I looked into it as I'm a HUGE fan of electrolysed water (hypochlorous acid).
You can't revitalise it but you can always make a fresh batch as it's so cheap to make up.
I was briefly tempted by this as I can't use many chemicals as I have so many allergies. I even have problems with some of the Method cleaning products. The stronger smelling ones can kick off an asthma attack in minutes (I'm looking at you, floor and shower cleaners!).
However, it is expensive and I know from talking to my dentist and reading up online that the commercial generators don't last that long. I wonder if Q would honour a warranty if it broke?
I need to go back to the recording to check but I'm pretty sure the death knell for me was when the guest said it wouldn't kill viruses. This caught my attention as the Dew Superclean doesn't either (I checked with Dew - only the Disinfect does).
With this in mind, I now use Dew Superclean with a microfibre (mop or cloth) on a greasy surface and Disinfect afterwards on food surfaces and in bathrooms. I also have a steam cleaner that I love but don't use Dew in it as hypochlorous water will degrade some metals. I also use the mister with Disinfect in it on my dog's bed as it doesn't wet it but does stop the smell between washing.
You need to be careful with it around aluminium as it will corrode it. I'd also read that a commercially-produced form can corrode stainless steel but only if left on the surface for a long time. I've been using Superclean about a year and it brings my stainless steel sink up lovely but I always rinse it off after a minute or two.
I go through loads so I buy the big refills of Dew so it doesn't cost too much though if you don't mind using chemicals it works out similar to the Astonish range (a lot of which I actually can use, along with some of Aldi's basic cleaning products - shocked me as all Flash and some Method kills me) price-wise.
Don't buy loads of Dew (or make up loads of your own) as it does degrade. Unless, of course, you go through it like I do! My first brushes with hypochlorous acid were with Aquaint (Vital Baby Water) and the pet care product, Leucilin (for wounds). Both stated to use within 3 months of opening. I marked the date on the bottles and, sure enough, both products lost that "chlorine" smell soon after. I keep one bottle of Dew Disinfect in my shed for rinsing my hands after handling the bin, It was opened last September but I keep the nozzle closed and it still has the brief bleachy smell so I'm quite happy about that.
One of the great things about these waters is their ability to degrade into plain old salt and water. No nasty chemicals going down the drain. They also don't bleach clothing - as I would have found out many times the way I accidentally splash myself. Superclean will help with light grease stains on clothes (as evidenced by the number of times I get that on myself, too!).