First off, for reference, there is another thread I started here: http://www.moyermarine.com//forums/s...9553#post89553 regarding relocating my heat exchanger in response, in part, to making room for an upgraded alternator.
Also for reference, the boat is a C&C 27 Mk III ('79 vintage).
Trying to make room for the heat exchanger relocate to the port side, I'm moving my batteries, and hope to add a dedicated cranking battery.
So There is no way that I can see to fit even one battery with proper cell orientation (port to starboard) next to the engine on the lower shelf of the factory original battery space. I might be able to shoehorn something in there .... but I'd do a lot of battery shuffling to do anything in the area of the carb. It is also, too close (by ABYC) to the carb / fuel lines / etc. I believe the spec is 2-foot minimum distance.... but even that doesn't apply as far as I see as it requires the fuel source to be open to the atmosphere.
Also as I mentioned in the other thread, my alternator has died and I realized the original 35 amp alternator just wasn't really proper for 220 amp-hr of house battery (2 x Group 27 flooded Costco deep cycles) and whatever I end up with for a start battery. I've gotten myself a Delco 75 amp alternator. So using the rule of thumb of 30% of battery capacity and assuming I end up with a cranking battery around 80 amp-hr that is (220 + 80)*30% = 90 amps. Not ideal, and I realize that I'm not going to get anywhere near 75 amps out of the RPM's generated by an A4, but certainly far better than the old one!
So some questions / notes for potential comment to start:
1) start battery .... anyone see anything wrong with a Group 24? I may not find a reasonable location for the battery though .... still thinking on that.
2) battery boxes .... anyone used these, or something similar? http://www.allbatterysalesandservice...cfm/4,248.html At least for the house batteries. I'm thinking of putting them under the aft seat of the dinette area (port side). I think these boxes would fit on a platform. Only the two house batteries would fit here. The location would increase cable distances significantly but the batteries move about 2-1/2 feet further forward. There's also a way to route cables forward to this area behind the cabinet holding the icebox on the port side.
3) the only, potentially slightly better location, for the start battery that I can fathom is behind the main bulkhead on the port side ... so a foot or so further aft than the location of the current batteries.
4) As far as I can see there are few sailboats out there that meet the ABYC requirements for separation between fuel and NON ignition protected electrical equipment. With the main bulkhead penetrated by the engine and the bilge open to this pass-through it seems to me that just about ALL the electrical equipment on-board must be ignition protected! Just think about the rear of the engine control panel in the same space as the fuel tank ... in an enclosure? Nope! I was thinking of putting new electrical panel in the area freed-up by moving the batteries, but it might be much better to centralize the electrical in the area of the dinette. Some of the electrical is flexible in location ... the battery switch, charger, galvanic isolator, automatic charge relay and I believe windlass components are all ignition protected. However AC switches and breakers, DC distribution panels, fuse panels, etc. are not (at least not all are).
Pictures to follow.
Also for reference, the boat is a C&C 27 Mk III ('79 vintage).
Trying to make room for the heat exchanger relocate to the port side, I'm moving my batteries, and hope to add a dedicated cranking battery.
So There is no way that I can see to fit even one battery with proper cell orientation (port to starboard) next to the engine on the lower shelf of the factory original battery space. I might be able to shoehorn something in there .... but I'd do a lot of battery shuffling to do anything in the area of the carb. It is also, too close (by ABYC) to the carb / fuel lines / etc. I believe the spec is 2-foot minimum distance.... but even that doesn't apply as far as I see as it requires the fuel source to be open to the atmosphere.
Also as I mentioned in the other thread, my alternator has died and I realized the original 35 amp alternator just wasn't really proper for 220 amp-hr of house battery (2 x Group 27 flooded Costco deep cycles) and whatever I end up with for a start battery. I've gotten myself a Delco 75 amp alternator. So using the rule of thumb of 30% of battery capacity and assuming I end up with a cranking battery around 80 amp-hr that is (220 + 80)*30% = 90 amps. Not ideal, and I realize that I'm not going to get anywhere near 75 amps out of the RPM's generated by an A4, but certainly far better than the old one!
So some questions / notes for potential comment to start:
1) start battery .... anyone see anything wrong with a Group 24? I may not find a reasonable location for the battery though .... still thinking on that.
2) battery boxes .... anyone used these, or something similar? http://www.allbatterysalesandservice...cfm/4,248.html At least for the house batteries. I'm thinking of putting them under the aft seat of the dinette area (port side). I think these boxes would fit on a platform. Only the two house batteries would fit here. The location would increase cable distances significantly but the batteries move about 2-1/2 feet further forward. There's also a way to route cables forward to this area behind the cabinet holding the icebox on the port side.
3) the only, potentially slightly better location, for the start battery that I can fathom is behind the main bulkhead on the port side ... so a foot or so further aft than the location of the current batteries.
4) As far as I can see there are few sailboats out there that meet the ABYC requirements for separation between fuel and NON ignition protected electrical equipment. With the main bulkhead penetrated by the engine and the bilge open to this pass-through it seems to me that just about ALL the electrical equipment on-board must be ignition protected! Just think about the rear of the engine control panel in the same space as the fuel tank ... in an enclosure? Nope! I was thinking of putting new electrical panel in the area freed-up by moving the batteries, but it might be much better to centralize the electrical in the area of the dinette. Some of the electrical is flexible in location ... the battery switch, charger, galvanic isolator, automatic charge relay and I believe windlass components are all ignition protected. However AC switches and breakers, DC distribution panels, fuse panels, etc. are not (at least not all are).
Pictures to follow.
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