Hello,
Does anyone have experience with larger alternators (65-80 amp)with
the Sabb g-10? Standard was a 35 amp. Thank you.
Tom Winkler
|
We have the Sabb G-10 engine with the 35 amp S.E.V original alternator. I replaced the regulator with a Balmar regulator. The 35 amp alternator will deliver about 25 amps continuously when the charging cycle is in the balk charging phase at an engine rpm of 1,200. We are considering a larger alternator. Because each 25 amps of alternator output requires about 1 hp of engine power, the largest alternator we could turn is about 80 amps when we do not need shaft horsepower and 40 amps when we need shaft horsepower. The Balmar regulator can be set at will to delivery full alternator power or 1/2 power. If I upgrade, I am considering a rebuilt car/truck alternator. The Balmar alternator is rated at 80 amps at 8,000 rpm. We motor a 1,600 rpm. Even though, the alternator-to-engine rpm ratio is 2-to-1, the alternator can only turn at 3,200 rpm. This is significantly less than 8,000 rpm, hence power delivered may not be much more than from the 35 amp alternator. I plan to research amps output as a function of alternator rpm for different amp rated alternators.
Any information is appreciated. On a side-note, the more I understand about electrickery, the less I understand.
Fair Winds,
Rod
----- Original Message -----
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Hi Tom,
Yes, I have a Sabb 10hp with a 35 amp delco-remey alt. I tried a 65 amp once(on loan) and it loaded the engine up enough that I could feel the power difference (lack of)when motoring.
I found that for charging batteries on anchor the 35 is enough to put out a steady 20 amps(regulator cut out of the system), but you have to watch no to overcharge.
How do you like the Sabb? We love ours....hand start only so never worry about lack of battery power.
cutterlooker wrote:
Hello,
Does anyone have experience with larger alternators (65-80 amp)with
the Sabb g-10? Standard was a 35 amp. Thank you.
Tom Winkler
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