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hi  jeff cote here with pacific yacht  systems we are doing a series on ask pys  where boaters ask  us questions about their boats and we  try to demystify  all of the crazy choices that we've had  about that  so we've got a question from robert  robert's got a 32 grady white uh lovely  boat by the way  and he's asking how many solar panels do  i need to run my fridge so  instead of actually ask answering with  how many solar panels  let's think about how much how much  watts because  watts is really the end result that  we're looking for and you can get to the  end result by  one panel two panels three panels it all  depends on the  space available on your boat so a  typical  refrigerator on a 32 foot grady white is  probably going to draw  probably about 75 amp hours i would say  now listen  some of you might know the number  exactly and if you are a 32 foot grady  white owner and you know exactly what  your amp hour consumption is  on that boat per day for the fridge  please post it down below  for all of us to know but i'm going to  take a guess i'm going to say about 75  amp hours a day  so if you want to offset a 75 amp hour a  day fridge  depending on obviously the climate where  you are which is basically what latitude  are you and also when are you boating  but let's here in the pacific northwest  in the summer from may to september  you can pretty much the rule of thumb is  a factor of four  so what does that mean so if you're  wanting to run  75 amp hours a day from solar you take  75 amp hours and you  multiply it times four that gives us  300. i know the units are not working  out but this is a short formula if you  want a long formula  go on my website and geek the long  formula is there  but for the rest of us that just simply  want to get this done you take 75 you  multiply times 4  equals 300. 300 watts is your target  size array and if you can fit you could  fit that with three 100 watt panels you  could fit that with  two 150 watt panels right you can slice  and dice you can have a 200 and 100  it doesn't matter how you get to 300 but  the important thing is you need 300  watts  of solar array to run a 75 amp hours a  day refrigerator  which is what we would expect on a 32  foot grading plate  thank you for watching this video if  you've got further questions  and you're wondering about your own boat  please ask questions below or send us an  email with your questions and we'll get  to them  hopefully as soon as possible if you haven't done so please subscribe  to our youtube and get our weekly  updates we're posting about four videos  a week right now  and also thanks for watching