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hi youtubers jeff cote here with another  session of ask pys  we've got a fellow boater uh torsten is  asking a question  he says jeff i bought a victron  multi-plus 12 volt  3000 watt 120 volts ac in your videos  you state clearly and i do  that you should build or install an  inverter  with a switch on the dc side to secure  the ac  in case of necessary work the handbook  or manual yes i read it  smiley face thank you for doing that the  manuals are intimidating but they're  worth reading  does not request it and if i toggle the  switch on the inverted or off  there is no loud load on the ac side  what's the reason for a second cutoff  switch  oh god i love that question why why why  indeed it comes down in north america  you absolutely need that switch so  victron is from europe so they might  have a different standard over there but  let me tell you why they should do it in  europe as well  it's think about the analogy a little  bit about a fuel tank  you can absolutely install a fuel tank  and your engine and not have your fuel  shutoff  valve you don't need one and who tells  you why you need one right  it doesn't matter but if you understand  why then you'll see why it makes sense  a fuel shutoff valve is in case  something happens and you want to turn  off the fuel to your engine  you have to have a way for not actually  like cutting off the line but actually  shutting off fuel to the engine  and your inverter is the same thing why  trust  an inverter remote panel to turn off  your inverter what if that  little breaker doesn't actually  communicate properly what it's supposed  to do  and it's a little bit like shore power  think about your shore power would you  whenever you're working on your boat and  you're going to work on the ac panel on  your boat or you're going to work on an  ac outlet  i ask this all the time in my seminars i  say you know  what would you do if you're going to  work on the ac of your boat would you  just turn on the breaker turn off the  breaker  you could right the breaker is supposed  to turn off ac on your boat  but why trust a breaker when you can  actually disconnect your boat from shore  power  like why not take the necessary step to  potentially save your life because  that's what we're talking about  electrocution at ac  at 120 can have pretty serious  consequences right we're talking about  literally lethal consequences so what i  say to boaters and i'm like well okay so  if you're doing that for sure power  your disconnect your shore power  whenever you're going to play with your  ac system on your boat and you're going  to change an outlet  well that bar is pretty important and i  don't think you want to do less than  that  and so same thing we were on a boat just  recently and we were going to install  a gfci outlet and sure enough what i  told the owner i said okay let's go  here's an example let's go turn off the  inverter service disconnect  and if you actually see i'm going to  show you on a diagram  right here it's really really important  to have this inverter service disconnect  and i'm going to even highlight it in  red or something right here  this switch allows us as boaters to know  for sure that if there's no dc  power coming to your inverter charger  there is no way for that inverter  charger to create ac  and that's why you absolutely have to  install  an on off switch to your inverter so  that when you are going to  service your ac system you want to know  a hundred percent that that inverter  cannot turn on  and the way to do that is by having an  on off service disconnect  on the dc side of your inverter charger  and notice here in the diagram right  here  that's your inverter service disconnect  so that's what i recommend you do even  if the manual says you shouldn't do it  or don't need to do it  you definitely want to do it  thank you for watching this pys video if  you've got further questions please ask  it below or contact  us on our contact form on our website and don't forget to subscribe thanks  again for watching  English (auto-generated)  Videolytics      Tools  Compare