My buddy had all kinds of problems with his Solix 15, the unit have been replaced once and the transducer twice. The unit locks up randomly and will have to shut it down and restart a couple times every trip out. He has 8 gauge wire ran from 2 group 31 AGM batteries paralleled together, he even bought a an expensive set of crimpers for the wiring. Just this past Saturday we were fishing in my boat with Helix with Mega, he made the statement that if he could do over he would have gotten a Helix 12 because the imaging is the same.