Sump pump: Adding Lifepo4 battery and Smart features

Wanted to update my sump pump setup from old school SLA to something more modern. I decided to build my own since nothing existed. This setup lets me use large lifepo4 battery which has deeper and longer cycles. Using charger connected with zwave plug allows to control charges to avoid having battery just sit at 100%, I have about 6watt draw on it so every few days I charge for 1hr. However if there is rain in forecast I have it charge 6hr to ensure top offed.
Primary pump run will run off AC or Inverter. If Primary or inverter failed, then I have DC pump connected to battery directly using zwave relay which will send me an alert if it gets activated. Zwave relay will run even if hub doesn't down (no alert then).
Items in this build
Inverter https://amzn.to/441td2J
Battery https://amzn.to/3nb7YuH
Charger https://amzn.to/3HfwYI4
Transfer switch https://amzn.to/43ZwnnT

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