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hi youtubers  jeff cote here with ask pys we've got a  question from another voter  uh jeremy so jeremy's asking a really  common question and i'm getting it more  and more because i'm promoting  this concept that you need to charge  your battery bank at a minimum rate of  charge  so for instance an agm or  which is a lead acid battery or flood a  lead acid battery the deep cycle battery  should at least have  10 percent of its capacity as a charge  rate so if you have a 400 amp hour  battery bank  you're going to have 10 of that as a  charge rate so 10  of 400 is 40 amps now  great advice and easier to do with  chargers or alternators right where we  can size a large alternator to be able  to recharge a battery bank  at the correct or appropriate rate of  charge  and again if you don't want to do that  that's fine but then the consequences  you're going to have your batteries age  prematurely they're going to solve it  so that's why you want to charge at a  minimum charge rate  now here's the question from jeremy  jeremy says  but jeff i've got what happens with  solar wind  hydro i mean how am i going to get 10  of a charge rate to recharge my battery  banks  and he's great question from jeremy like  how would you have a solar array that  can actually give you 10  of your battery bank capacity as a  charge rate and the answer is it's  almost impossible  right and on my boat like i've got a  pretty significant array for a 36 foot  sailboat  my erase 450 watts i have about a 900  amp hour battery bank  my alternator is 180 or 200  so that's no problem my battery charger  is a 150 amp battery charger  but my solar never gets there so  i basically unless you have a mega array  or you have a huge wind generator or a  huge tow generator you're not going to  be able to recharge your battery bank  at the ideal charge rate all the time  you just won't  you can't have it it's just you're not  going to have a solar array that big  and you don't want to have a tiny  battery bank so that your solar array is  proportionally  you know maybe you got a 400 watt array  and you're like oh my 400 watt array i'm  going to size my battery bank so that it  has a minimum of 10.  with solar wind and a tow gen  you do what you can you know you you  honestly there's ideas in life  and then there's reality and with solar  and wind you do what you can  and yeah you might not get 10 percent  and it would be good sometimes if you  know to maybe run the engine  at a higher rpm to get a better faster  charge rate or sometimes  to connect the short power and if you  can't do either  that's okay too you do what you can and  it's going to be really hard for any of  us  to give the exact charge rate we want of  our batteries from solar or wind  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  English (auto-generated)