I’m on season 4 with my tank and I love it. The number one benefit is time savings. You turn the power button on, roll your hose out and ready to go in under a minute. Two, always having consistent water pressure and more when you need it (this was the number one reason I went with the set-up, inconsistent water pressures and high TDS). Reason number three: I have some jobs that have no water source or inconveniently located. There is very little maintenance: battery will last about a week on a single charge (my battery is now 4 years old), 65 gallons is plenty to last all day (the flow control is a must) and I just refill it when I get home at the end of the day while I do yard work. I’ve modified it a bit since this post but it’ll give you and idea of how to set it up.
https://community.windowcleaner.com/t/portable-pure-water-set-up/29757
