The downside to LFP batteries is the fact, at this stage, they are typically dearer than conventional Li-ion batteries because it’s an even newer technology with much less suppliers. Some solar chargers even have an on-board battery and that is billed through the solar panel when not charging anything else. https://solar-battery-system31863.arwebo.com/53522136/5-simple-statements-about-solar-battery-price-explained