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hi everyone  jeff cote here with pacific yacht  systems we've got a question from a  fellow voter  so this boater asks i've got six car six  golf cart batteries that are about 232  amp hours each  a bank of four that were installed in  september 2010 and another two that were  installed in january 2012.  they're all hooked up in one bank which  is important so it's actually one  battery bank just in two different  places  the four that are together seem fine but  the two newest batteries that are  closest to the  freedom inverter charger are actually  heating up and losing water  is it possible that they were wired  incorrectly i've noticed that the last  year the two batteries seems to get  hotter that's a really good question  so the first thing we got to remember is  that when we're actually adding  batteries and i know this is a challenge  on power boats and sailboats  the battery bank should be in one place  that's the first thing if they're not in  one place  you're going to make your life a little  bit more complicated i know it's easier  said than done but that's one thing to  consider  second mismatching batteries of  different ages  even though they're the same type in one  bank is guaranteed to give you problems  okay uh you just it's simply it'd be a  good analogy would be changing one tire  on your car but leaving the three other  ones  uh older tires you can't do that i know  it's a pain  but what's happening in your case is  that the new batteries are basically not  only  working hard but they're also picking up  the slack  from the four older batteries so in  effect the two new batteries are working  harder  and the other reason here and that's key  is that they're the closest to the  inverter charger  and depending on how your battery bank  is wired where it should be evenly  distributed where the negatives at one  end and the positive at the other end  it's very possible that your inverter  charger is actually connected directly  to those two new batteries  and they're effectively working harder  than the four other ones that are  effectively  supporting the two new ones  so all in all not good news but here are  the key takeaways  one is have your battery bank in one  place second  when you change batteries unfortunately  you got to change them all have them all  be the same age  and the same location and third you want  to have your loads  the positive at one end and the negative  at the other end what that does is it  allows for even charge and discharge of  your battery banks  so in a nutshell that's your answer  thanks for asking your question anybody  have more questions post them down below  and we're doing this as regularly as we  can  thank you