Radio fusion

Grüezi Mana,

boomjack wrote: Gruezi Fendant! Thanks for your answer Frank, ok that's what I checked, so it's not the fuse... For the bilge, still trying to better understand the system... Re Lithium batteries, the contact you gave me, who is really excellent, told me that for my system, there would be a lot to replace to be efficient, so I just replaced the pack with normal Zenith Gel batteries and will wait a bit more to go to lithium. All the best, D

I had 4x agm at 160Ah nominal as service batteries. With a car testing device I knew that their health state was at 80%, and I am preparing for the world arc so I didn't want to take any risk. The system is primarily mastervolt, so I decided to install 2x mastervolt ultra mli 5500 at their place. They have 400Ah, but because of the higher average voltage of these batteries they have a higher energy stored over the range 100% to zero. And you can use their charge down to zero,  or 20% of you want to treat them very well (with  agm, the minimum suggested is 50%). 

Edited by Pzucchel - 26 May 2021 at 22:11

Edited by Black Diamond - 27 May 2021 at 00:10

On our 575 #65 we have the system as described by Rick from Black Diamond above except there is also a manual bilge pump which sucks from the  center compartment with the pump handle at the stern starboard aft combing. Like Rick we replace the standard bilge pump with a large volume heavy duty 12V pump of 144 ltr/min capacity(2300 US gal/hr). We kept the small original as a spare for the mast base pump and have a spare of the 144 ltr/min pump as well. The "roving pump" has proven to be a great maintenance asset. To suck the water out from between the liner and the hull I fitted a 18mm hose to the end of the roving pump hose and insert it through the holes on either side of the bilge area where the roving pump is fitted amidships. With this small diameter hose you can access the space between the liner and hull. On our 575 there is not a bilge pump fitted to the forepeak and first off filled a manual pump but in the end fitted a 12V bilge pump for this space. I am also considering fitting bilge alarms to various spaces but for now regularly check spaces for water. I am also thinking of making up a roving bilge pump of a high capacity (144 ltr/min size and type) to be able to drop into a void if we have a major flood. The current roving unit although a great idea is a relatively low volume pump at 44 ltrs/min. Because we are 24/7/365 liveaboards we are always here to check bilges.  We recently had a friend with a 485 Oyster who had his sounder transducer snap off which resulted in a 38mm gushing fountain in his bilge which remained undiscovered until the floor boards started floating. He saved the boat but was hampered by bad placement of batteries (below the sole) and the inability to start the engine or generator - because all the batteries were underwater and when he got power up his bilge pumping was inadequate to handle the inflow. The standard 575 design has the house battery bank above the cabin sole which is good and the engine start battery high in the engine compartment which is also good. However the generator starts from the house bank which could be a problem during flooding so I have fitted a changeover switch so the generator can start from the engine start battery. Food for thought.