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The KFFKFF is a 24V DC to 220/230V AC single-phase hybrid inverter rated at 3500W continuous with a 7000VA peak, and it has a 100A MPPT solar charge controller built in. It runs lithium, LiFePO4 and lead-acid batteries and adds a lithium activation function. Three charging modes (solar only, mains only, or both) and four output priority modes (UTL, SOL, SBU, SUB) let owners decide whether the grid or the panels carry the load. It suits off-grid cabin, backup and small solar setups where one box should handle both charging and inverting. Against separate inverter-and-controller combos it saves wiring and wall space, but it is a 24V single-phase unit, so it will not serve 48V banks or 120V appliances.
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Lowest price we've seen: $259.99 on Nov 12 at Walmart. Tracked across 1 store since Nov 12.
This 2-in-1 hybrid solar inverter and charger delivers 3500W of rated pure sine wave output, with a peak output of 7000VA. It has a built-in 100A MPPT solar controller that reaches up to 94% conversion efficiency. It converts 24V DC battery power to 220/230V AC.
It works with lead-acid, lithium and LiFePO4 batteries and has a lithium battery activation function. Three charging modes are available: Solar Only, Mains Only, or Solar & Mains hybrid. Output modes are set to UTL, SOL, SBU or SUB. It can act as a UPS backup, switching over during a power outage.
An LCD display shows system status and parameters. Physical buttons adjust program modes and settings. The inverter accepts solar input, generator input and mains power. It can be used at home, in an RV or while camping.
