Yes, you can use your own panels with the Titan. You just need to make sure they are arranged in a way to produce a voltage between 35-145VDC, for the original Titan, 35-240VDC for the Titan Boost, and 35-130VDC for the 240sp. Lower than 35V DC will not charge the Titan and a Voltage the limit can damage the MPPT controller. Also this is the actual voltage output, not the rating on the solar panel. Solar panels make higher voltage as the temperature goes down, therefor it is recommended to stay 20% under the max voltage. If you have questions, please call us before connecting your solar panels.