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hi  jeff cote here from pacific yacht system  we've got a question  from a fellow voter named gunner hey  jeff great seminar as usual  thank you appreciate it glad you like  the content i'm going to install two  battery banks one engine  and two for house i'm using a battery  isolator the modern one the argo fett  from victron big fan  do i connect the solar connect  controllers directly to the house  battery bank  i have 200 watt solar panels should i  have one or two controllers  a lot of questions here and they're not  easy right so let's do them one at a  time  most of the solar controllers that we  use are single output solar control  so there's such a thing as a solar  controller that actually has two outputs  but the controllers that we install and  most of the times that we use on both  are single output meaning they're meant  to be  installed to a single battery so in most  instances i would recommend having a  solar controller connected directly to  the house battery  and i would want that so that it's  unswitched so even when the battery  switch off  the solar controller has to be directly  connected to the battery  or a positive distribution right beside  the battery  that is always powered regardless if the  battery switch is turned on or on  or not so that's the first question and  then the other question was  can i install two solar panels or if i  do install two solar panels 100 watts  should i install them in series in  parallel or dedicated controllers  shading is a huge issue with solar  panels it's  shocking to realize how shading even  just  a hat on a cell will actually bring the  so the solar output dramatically down  so if we consider that and we know that  there are sometimes  issues of shading on our boats because  there might be things a little bit  higher than the solar panels  you'll want to make sure that you put a  dedicated solar controller per panel  so if one panel is shaded it's not going  to affect the whole array  now if you're lucky and your solar  panels are high enough and nothing will  ever  shade the solar panels even a little bit  then i would recommend installing the  solar panels  in series bringing them to a single  controller  and then that single controller going to  the batteries  another point and something else to  consider is how important are those  solar panels for your boat  some of us really need our solar panels  it's important we can't live without  them  so in those instances i always ask the  client what happens if the controller  fails  does it make sense to have for reasons  of redundancy multiple  solar controllers so if you lose one  panel or you lose a controller you're  not losing the whole array  so redundancy is certainly an argument  and on my boat remember i have six solar  panels  six controllers i have a sailboat and i  didn't want to have  any shading affect the output of my  solar array sixth controller six solar  panels  all connected directly to the house  battery so that was an interesting  question from god  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 lastly if you  haven't subscribed to  our channel please do so that way you'll  get the regular contents and in closing  thanks for watching