Decided to make my own instead. BTW, I'm a huge fan of EcoTech products, just not the battery backup. Not feeling like soldering (and I have a background in micro-soldering), I decided to make it a plug and go system right off the shelves of Amazon (mostly). Been working great for a year and is a Lithium Iron Phosphate 20 Ah, battery for about $150. Video show instructions with parts list. Hope this helps somebody. Nothing worse than a dead tank when you get home from vacation.
Let me know if you have any questions.
Let me know if you have any questions.