Payback Period for Offgrid Solar Power System's: How much $$$ do I actually save??

Parts List for this system (affiliate links): LV6548 All in one Solar System: https://watts247.com/product/2-x-lv6548-13kw-120v-solar-inverter-8kw-2-x-4kw-250v-mppt-bms-ul1741-listed-built-in-wifi/?wpam_id=3 Class T Fuse: https://amzn.to/3Bzjj9A LiFePO4 batteries: https://www.mobile-solarpower.com/l...

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