Ill be honest I run two 9" graphs, one 7", livescope, foot pedal for my troller , and live well pump all day with an auxiliary aerator just for extra in the hot months , for tournaments. And my old carbed motor has to crank way more than a fuel injected engine to get her breathing and i have never had an issue with power. I just run a 27 series pro guide for my house battery. I do replace it every 2 ish years, just because i dont want issues. Never shows any signs of going bad in those 2 years.