SimpliPhi battery cost should be compared with the full value it brings to an off-grid setup, not just the upfront price. For a treehouse or cabin, lithium iron phosphate storage can reduce generator runtime, handle repeated cycling, and require less maintenance than many lead-acid banks. The real calculation should include usable capacity, cycle life, inverter compatibility, charger settings, installation needs, cable sizing, fusing, grounding, and how much fuel and noise the battery bank can save over time. https://a1solarstore.com/batteries/briggs-and-stratton-simpliphi.html