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hi  jeff gotta here with pacific yacht  systems we've got a question from  a small boat owner 19-foot boat with a  84 johnson and 144 140 horsepower  trolling mortar so this boater has bilge  pumps aerator trim temps power lift nine  inch garments stereo  vhf the usual nav lights etc  and a dual battery bank you know that's  the one thing about small boats they'll  pick they'll definitely pack a punch  right i see boat owners that have  20-foot boats 25-foot boats that have as  much gear  as a 35 or even a 40-foot boat and the  question from this boat owner  joe is saying should i actually have a  battery monitor on  that boat well it really depends if  you're running the engine all the time  or not  right you know if you're actually  running  and you're trolling and you're actually  trolling for extended periods of time  it's very possible that that alternator  is actually not going to be outputting  enough current to actually offset all  the loads that you're running on that  boat  so we've seen trends where actually over  time the battery voltage keeps going  lower lower lower or lower  to the point where the battery dies and  the engine is running  so if you one of those two batteries is  used predominantly for house  meaning you know you might start on run  but you're going to run your boat on two  then i would install and we're doing  that right now on a greedy white i would  install a battery monitor on what  battery number two that you would use  for your house so that while you're  trolling you can see the trend  right don't be surprised after six or  eight or ten hours of trolling  that number two is dead see the trend  and if you can't  offset your loads right as you're  running your engine  it's going to tell you hey you know guys  we're going to be on board for another  four or five hours but at one point  we're either going to have to run to  another fishing hole  increase the alternator output by going  faster or we're going to have to make a  decision  so battery monitors are a good way to  not be surprised on the water  and i'm a huge believer even on a  20-footer so that was  a good question from jim  thanks for watching this video if you've  got further questions that we didn't  answer  please ask them below or go on our  website and fill up one of the forms  and we'll get a chance to do so support  us to keep this channel ad free  by donating via paypal or buying one of  these lovely hats  the links are below and lastly if you  haven't subscribed to  our channel please do so that way you'll  get the regular content  and in closing thanks for watching  you