We have tested Goalzero, Renogy, Overland Solar, and Flexopower. We recommend using a solar panel with 8-25V DC output. Do not use a solar panel with a charge controller as the PLB40 is integrated with a DC-DC charger and may cause your panel not to product power. The 12V input to the PLB40 battery is a gray SB50 Anderson connector. We recommend checking with your solar panel manufacturer to ensure compatibility.