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hi youtubers jeff cote here with ask pys  we've got a question uh from charles a  fellow voter  charles asks i've got a 30 a 42 foot  sailboat that i keep  unmonitored on a dock on a small island  there is shore power but we have many  power outages i don't get to check my  boat very often maybe every six weeks  i have an efoy 140 which is a methanol  fuel cell  can i just leave that on automatic  well that's a good question charles and  yeah it's one of the benefits of having  a methanol fuel cell  methanol fuel cell is not just on or off  it also has the ability  in the automatic mode to actually  maintain battery voltage over time  and when we install methanol fuel cells  on boats we tell boaters  that one of the benefits of this  methanol fuel cell is that if you do  ever lose shore power  and you don't have crazy loads but just  a little bit of loads  your fuel cell if it's connected to  what's called an m10 cartridge which is  about this big  uh would provide about a little bit less  but almost up to if it's full a thousand  amp hours  of battery capacity so if your battery  bank is 400 amp hours that's over a  thousand of amp hours  that this methanol fuel cell can  actually generate in power  to replenish your battery so a fuel cell  is a really good way  to act as a backup charger in the event  that you lose your shore power  connection especially when your boat is  left unattended for a period of time  and by the way i have a methanol fuel  cell on my boat and that is one of the  benefits open with the methanol fuel  cell on my boat is that it acts as a  backup battery charger in case i ever  lose short power  thank you for watching this video if you  have any questions please ask it below  or use our contact form on our website and don't forget to  subscribe  so that you can keep having these weekly  and we're producing almost four videos a  week now  and thanks again for watching