Yes, LiFePO4 batteries can be charged with solar panels. In fact, this is one of the most popular applications for these types of batteries. Solar panels are a great way to recharge these batteries because they are very efficient and can provide a long-term, sustainable power source. There are a few things to keep in mind when using solar panels to charge LiFePO4 batteries, however. First, it is important to make sure that the solar panel is sized properly for the battery. Second, the solar panel should be able to provide enough current to charge the battery at its rated voltage. Third, it is important to use a controller designed specifically for charging LiFePO4 batteries when using solar panels.