I have had and used the iSeries in 2 different campers. I love the unit and plan to put it in my new camper this spring. One of the very good points I would like to make is tech support. I had a power surge of some kind and shorted the board, I sent the panel in and for $25 the repaired it and sent it back to me. A down side to the system is it does take some time to run all new wires from each tank to the panel. You can't really use the existing wiring because the existing wiring is 1 wire from each tank and the iSeries needs 2 wires from each tank back to the panel. The iSeries system was always 100% accurate. Also you can custom set alarms for what ever setting full or empty you want. i.e. Black tank you want to alarm at 80% full but grey tank you are not as worried about maybe so you set that one at 87% full and your fresh tank you set at 20% until empty.
2013 F-350 Turbo Diesel
2016 Heritage Glen 368rlbh