I am planning to install 640 watts of solar on our 2003 U320 but do not know what accessories I need or would be helpful. We still have the original Xantrex ProSine 2.5.<br/><br/>Does anyone know if it would be good for me to install this Magnum Mini Panel? Would it go close to the batteries or by the Xantrex?<br/><br/>Thank you,