How to deal with the alternator?!

[Fuss]

really, i find that hard to believe, one has leakage, measured in farad completely different characteristics.

no one refers to a supercap as a battery

yes my maxwell super cap starts my 6l 6cylinder engine easy as. it’s not LTO
light as a feather, thin and small

[Fuss]

i just did a bit of googling, i guess that are overlapping to some degree but they still are very different. my maxwell supercap is self contained and small… it’s marketed as a supercap, not a battery and it has leakage , typical of a supercap

[s/v Jedi]

Originally Posted by Fuss

i just did a bit of googling, i guess that are overlapping to some degree but they still are very different. my maxwell supercap is self contained and small… it’s marketed as a supercap, not a battery and it has leakage , typical of a supercap

But you did find that I was right, right?

[Fuss]

i’m probably one of the first here to make this all the same cell multiple redundancy lifepo4 house bank, now backed up with a supercapacitor.
you could do it with an lto but why bother when it takes more space and configuration. and also needs to be part of a charging regime.
a maxwell used supercap you can get for 150€ at the moment

[s/v Jedi]

Originally Posted by Fuss

i’m probably one of the first here to make this all the same cell multiple redundancy lifepo4 house bank, now backed up with a supercapacitor.
you could do it with an lto but why bother when it takes more space and configuration. and also needs to be part of a charging regime.
a maxwell used supercap you can get for 150€ at the moment

Show me the €150 super capacitor that can start a marine diesel engine.

[Pete7]

Originally Posted by Fuss

yep, integration is nice but simplicity is best … otherwise there is no time to monitor the wind, it’s replaced with monitoring the electrics.

Agreed and you might add cost to the integration. Will a simple Victron BMV battery monitor do, or do you need the full Cerbo display with arrows showing which direction the power is flowing?

We all have a choice but personally a 15 year old Sterling Power Management panel still works and gives us enough to meet out needs with twin shunts.

[rgleason]

Does the maxwell supercap reduce the initial loads when starting an engine thus reducing the load on the BMS components and LFP batteries?
If it is a drain on the batteries, should you shut it off and turn it on just before starting?


As I understand it these capacitors will not help in the event of transient spikes such as BMS shutdown.

[Fuss]

Originally Posted by s/v Jedi

Show me the €150 super capacitor that can start a marine diesel engine.

look around and you will find one …mine cost 200 but i have seen 150 every so often

[Fuss]

Originally Posted by rgleason

Does the maxwell supercap reduce the initial loads when starting an engine thus reducing the load on the BMS components and LFP batteries?
If it is a drain on the batteries, should you shut it off and turn it on just before starting?


As I understand it these capacitors will not help in the event of transient spikes such as BMS shutdown.

sure it does, that’s the idea, and much more than the LTO solutions being super promoted at the moment… don’t waste you time with this nonsense. they need a charging regime at the very least.
transient spikes.. don’t have your instruments running off the same battery that can/could be used for starting…always run them through a dc dc converter.
i’ll come back to this subject later when i have more time.

[Iron E]

Originally Posted by Fuss

not really, a ultra capacitor makes more sense than agm… so why
because you can have the lithium as part of your house bank… a big plus point as there is no agm hanging around just starting the engine… i used to have this and was a big proponent of the starter only having one job.
its not only part of the house bank but can start your engine if needed.
the ultra capacitor is the main engine starter it’s small and light.
you only have one type of cell onboard providing the ultimate in redundancy .

How does the Ultra Capacitor perform when you may have multiple starts and/or prolonged hard starts which occur from engine or fuel issues?

[s/v Jedi]

Originally Posted by Fuss

look around and you will find one …mine cost 200 but i have seen 150 every so often

I did and found nothing that will start an engine. Your inability to point one out implies there is nothing.

[Fuss]

Originally Posted by s/v Jedi

I did and found nothing that will start an engine. Your inability to point one out implies there is nothing.

I just looked in eBay , there’s new ones for 285€

MAXWELL BOOSTCAP ULTRACAPACITOR 16V 500F
That what starts 6l 6cyl diesels

[s/v Jedi]

Originally Posted by Fuss

I just looked in eBay , there’s new ones for 285€

MAXWELL BOOSTCAP ULTRACAPACITOR 16V 500F
That what starts 6l 6cyl diesels

So not €150?

Also, please link a video showing it can start a marine diesel engine because I don’t believe it.

[Fuss]

Originally Posted by s/v Jedi

So not €150?

Also, please link a video showing it can start a marine diesel engine because I don’t believe it.

Hey, I’m not doing that…If I say it starts a marine diesel engine then it does.
And not just any marine diesel 6l 6 cyl 135 hp.

So for most sailors you could use an even smaller supercap…,even cheaper than 150…
But I only report on my experience so others would have to do their own research….

For more than 1 year I started this motor using eve280 cells with no damage to them at all and now I just installed the supercap so I have an alternative start method for redundancy.
Actually the main start method is the supercap with the lifepo4 as the backup.

But look on the bright side, you might not no much about maxwell supercaps but you got to prove me wrong with the 150€!!

[s/v Jedi]

Originally Posted by Fuss

Hey, I’m not doing that…If I say it starts a marine diesel engine then it does.
And not just any marine diesel 6l 6 cyl 135 hp.

So for most sailors you could use an even smaller supercap…,even cheaper than 150…
But I only report on my experience so others would have to do their own research….

For more than 1 year I started this motor using eve280 cells with no damage to them at all and now I just installed the supercap so I have an alternative start method for redundancy.
Actually the main start method is the supercap with the lifepo4 as the backup.

But look on the bright side, you might not no much about maxwell supercaps but you got to prove me wrong with the 150€!!

So you will post a video showing you starting your diesel from a supercap? The only times I have seen this it turned out to be an LTO battery wrongly labeled supercap.

If there’s nothing to show… there’s nothing to show.