Ugh. I got caught up gambling on this dumb product. After over a year of missed deadlines and messed up orders, I finally got my flex 1500 on Sep 14. Wouldn't you know it? The paper-thin latch that holds the module to the battery bent and broke immediately. I didn't even notice until I picked the unit up after doing the full charge. One side of the battery dropped and bent the other latch. Now the unit is stuck together with one bent latch. Because I couldn't detach the unit, they had to send me hazmat packaging to handle the unit as a whole. Of course, they messed up the paperwork so they had to also ship me new hazmat paperwork. The tracking number still shows it hasn't been shipped.
THIS IS A WARNING to anyone thinking about getting this unit: the 'quick start' paperwork says not to disconnect the units once connected. Now, I know this is because you run the risk of the tiny latches breaking anytime you connect the units. With that being said DO NOT get this unit if a selling point is to attach/detach batteries semi-frequently (or at all). You will probably (and quickly) break the latch and have a great time playing email tag with their support staff to get it replaced. Alternatively, you can, as they suggested to me, tie the unit together with a strap. I'm not kidding, this was an actual suggestion from them. I didn't wait 13 months to have to tie a product together with a strap like a bumper on an old jalopy.
Another thing to look out for, especially if you plan on having this in a van/RV with moving objects, is to be careful with the LCD screens. They have no protective glass over them and are completely exposed to damage.
What have I got myself into?