High output marine alternators- anyone running?

[Riverfamlee]

Anyone running a high output alternator? Like a Mechman or Balmar etc. Seems like the marine high output alts cap out at 170 amps But you get most of it at idle which is a good thing. Thinking of swapping mine. Anyone currently running one. Any issues?

 

[ElAzul]

I wouldn't run a non marine in a enclosed engine hatch. I've installed mechman alternators in cars they are pretty solid do they make a marine unit?

 

[spectra3279]

I've got 3 wire 10si 140 amp altenators.

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[Riverfamlee]

I wouldn't run a non marine in a enclosed engine hatch. I've installed mechman alternators in cars they are pretty solid do they make a marine unit?

yeah, they make a marine 170

 

[v6toy4x]

mechman IS the man!

 

[Shrub Lurker]

Well, that is good and bad. Bad is unlike in your car and or high on fentinal under a cops knee, these do not get enough air to breathe. Most guys that I’ve seen run these will replace them with more frequency than a stock 70 amp unit. They put out a lot more heat. Nice to have I get why. But can’t see the unreliability issues.

So, how big is that stereo?

 

[fishing fool]

Stop by wired4sound and get some AGM batteries, full river or odyssey.

 

[Rsqfxr]

Stop by wired4sound and get some AGM batteries, full river or odyssey.

I have odyssey’s but with my stock 496 70 amp alternator it was pissed trying to bring agm’s back up I found a stock replacement marine 120 amp haven’t really put it to the stress test yet


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[fishing fool]

Depending on how much stereo you are running with the right amount of battery you do not need them hooked up to the boat at all. Just need a starting battery for the boat.

Adam had BIG stereo and was running 5 group 31 batterys just for the stereo and could run all day. Go home and plug in to two inverters to charge them back up.

I have odyssey’s but with my stock 496 70 amp alternator it was pissed trying to bring agm’s back up I found a stock replacement marine 120 amp haven’t really put it to the stress test yet


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[rivermobster]

Let's say you actually did have an alternator that actually could put out 140 amps...

You would need a 0 or 1 gauge cable coming off the alternator to take advantage of that.

So be careful when upgrading electrical components. You'll need to upgrade all the related wiring as well.

Wire Sizing Chart for 12V/24V/48V DC Systems - DIY Solar Resources

Information on wire sizing and a universal AWG/mm2 wire sizing chart to help in designing a 12V, 24V, or 48V DC renewable energy system.

www.altestore.com

 

[spectra3279]

Let's say you actually did have an alternator that actually could put out 140 amps...

You would need a 0 or 1 gauge cable coming off the alternator to take advantage of that.

So be careful when upgrading electrical components. You'll need to upgrade all the related wiring as well.

Wire Sizing Chart for 12V/24V/48V DC Systems - DIY Solar Resources

Information on wire sizing and a universal AWG/mm2 wire sizing chart to help in designing a 12V, 24V, or 48V DC renewable energy system.

www.altestore.com

I have a standard battery cable going straight to the battery switch. Will be replacing all the cables with welding cable this winter.

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[Riverfamlee]

I have a standard battery cable going straight to the battery switch. Will be replacing all the cables with welding cable this winter.

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Don’t forget about the ground wires too.

 

[rrrr]

I have a standard battery cable going straight to the battery switch. Will be replacing all the cables with welding cable this winter.

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Why welding cable? Ancor marine wire has finer stranding for better conductivity and 105°C (221°F) rated insulation. It's also tin plated for corrosion resistance and available in red and black. Number 2 AWG will carry the load, it's rated for 170 amps at 75°C.

 

[rivermobster]

I have a standard battery cable going straight to the battery switch. Will be replacing all the cables with welding cable this winter.

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Make sure you use marine grade heat shrink on all your connections. The kind with the glue on the inside of it.

Moisture and wiring don't mix.

 

[$hot]

Stop by wired4sound and get some AGM batteries, full river or odyssey.

I have the X2 power batteries, so far have been great!

 

[spectra3279]

Don’t forget about the ground wires too.

Got that covered also

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[spectra3279]

Why welding cable? Ancor marine wire has finer stranding for better conductivity and 105°C (221°F) rated insulation. It's also tin plated for corrosion resistance and available in red and black. Number 2 AWG will carry the load, it's rated for 170 amps at 75°C.

Got this cheap. Like 100 bucks for 100 foot.

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[Spudsbud]

I have a standard battery cable going straight to the battery switch. Will be replacing all the cables with welding cable this winter.

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Yes, this.