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Lifepo4 Batteries
- Helmsman
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Re: Lifepo4 Batteries
Another consideration is where you put your bank. An engine room is typically a no go, due to the heat. Lithium is sensitive to the heat.
- km1125
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Re: Lifepo4 Batteries
Midnightsun wrote:Source of the post
....Unfortunately lithium is not all that good for use as stating batteries so those will remain the same. ...
Just so that statement doesn't develop some misconceptions for readers...
Lithiums CAN BE very good starting batteries, but they have to be "starting batteries" designed for high current usage. Just like lead-acid batteries can be starting batteries or deep-cycle batteries, lithiums can be configured either way too. They can typically be configured to deliver MUCH higher cranking amps at a higher voltage than lead-acid batteries It's just a matter of getting the right product for the right application.
- bud37
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Re: Lifepo4 Batteries
- Midnightsun
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2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
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Re: Lifepo4 Batteries
- Helmsman
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Re: Lifepo4 Batteries
Midnightsun wrote:If it were not a problem I would not be thinking about it. been anchored with solar for about 8 days now. Have some range anxiety going on as they say in EV talk. Trying to resolve this without adding another 250 lbs of batteries. I do like challenges so this is right up my alley.
Might want to check out Firefly Oasis Carbon Foam batteries. That might work for you and keep from upgrading the entire system.
- Midnightsun
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Re: Lifepo4 Batteries
I have a Blue Seas SOC meter that will not work well any more but luckily I did keep my Blue Sea DC meter which will replace it for monitoring the new lithium bank, the port and starboard starting batteries and the generator battery as the unit can handle 4 inputs
I will replace the shunt from the previous SOC with a Victron Smart shunt which does bluetooth once again and I can get all the SOC readings from my iPhone. https://www.victronenergy.com/battery-m ... tery-shunt
Only issue I have now is what if an alternator goes on the blink, no way of connecting the 2 house banks with the isolators gone. Maybe a manually activated ACR between the 2 start batteries is the way to go to cover this issue.
May even change my solar controller to integrate the system to a Victron bluetooth unit. https://www.victronenergy.com/solar-cha ... -30-100-50
Oh boy, lots of wires and connections but in the end it will be awesome, I hope!
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Re: Lifepo4 Batteries
Love your projects Hans, keep up the good work
- Midnightsun
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Re: Lifepo4 Batteries
Bought a 20A AC breaker and a length of 10ga triplex tinned boat cable to handle the load of the 80a Lithium charger. Will be going to my local solar experts who carry the entire line of Victron stuff plus a lot more for advice. Just want to make sure I have not forgotten something or misunderstood something before I begin to install. May actually get this done before the end of season comes around.
- km1125
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Re: Lifepo4 Batteries
Midnightsun wrote:Source of the post
....I have a Blue Seas SOC meter that will not work well any more ....
Wonder if you can elaborate on that. Does it use voltage as the primary tool for determining SOC instead of amp_in/amps_out?
Something 'oxymoronic' in that statement
You could just put in an "emergency combining relay" with a continuous duty rating. I'd add a big red (or some other color) light to it so it's obvious when it is activated so you don't inadvertently forget to disable when no longer needed.
- Midnightsun
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Re: Lifepo4 Batteries
I did see the idiosyncrasy in that after I posted, should have said a manual relay then again is that not a simple on off switch.
This would be a rather simple install to interconnect the 2 start batteries if an alternator should fail. https://www.amazon.ca/Continuous-Battery-Isolator-Current-Mobile/dp/B08SW4XVNR/ref=sr_1_8?dchild=1&keywords=200a+relay&qid=1630263759&sr=8-8
OOOR, maybe stop overthinking this and just install this between the 2 start batteries for emergency use only if an alternator were to fail. https://www.amazon.ca/Disconnect-Vehicles-Waterproof-Isolator-Position/dp/B07SLKJXCG/ref=asc_df_B07SLKJXCG/?hvadid=335562268731&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9000604&hvnetw=g&hvpone=&hvpos=&hvptwo=&hvqmt=&hvrand=10374070302753769819&hvtargid=pla-784427114051&language=en_CA&linkCode=df0&psc=1&tag=googleshopc0c-20
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