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Lifepo4 Batteries
- Midnightsun
- CYO Supporter
- Posts: 2856
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 257 times
- Been thanked: 1103 times
Lifepo4 Batteries
Lithium has come down to a some what reasonable price and the tech is now much more feasible in all respects.
Why Lifepo4? longevity is supposed to be 10 years plus. They can be drained to zero with no ill affects or voltage drop which means a 100ah battery actually has 100ah. They charge at full rate from zero to 100% basically on a bulk charge with no absorption phase which usually takes forever to get our standard wet cells to 100%. Discharge cycles are quoted as 2000 plus.
Enough of my babbling, read this. https://www.power-sonic.com/blog/lithiu ... batteries/
Will be using dual 300ah lithiums for a total of 600 usable AH which huge yet will only weigh in at about 68lbs each.
https://www.amazon.com/gp/product/B08N53GF81/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Unfortunately lithium is not all that good for use as stating batteries so those will remain the same. My 3 bank charger will service the 2 engines and my generator however the dedicated generator charger will be removed and replaced with a true dedicated lithium charger.
https://www.amazon.ca/gp/product/B07DP3X16F/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Still need to figure out how to handle the alternator Lithium issue but a call to Sterling should get me on the right track.
https://www.sterling-power-usa.com/Ster ... arger.aspx
- denders
- Deck Hand
- Posts: 77
- Joined: August 24th, 2015, 6:21 pm
- Vessel Info: 1985 Carver 3607 Aft Cabin
- Has thanked: 2 times
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Re: Lifepo4 Batteries
- Midnightsun
- CYO Supporter
- Posts: 2856
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 257 times
- Been thanked: 1103 times
Re: Lifepo4 Batteries
- Helmsman
- Commander
- Posts: 323
- Joined: May 9th, 2016, 9:16 am
- Vessel Info: Temporarily Boatless
- Has thanked: 71 times
- Been thanked: 42 times
Re: Lifepo4 Batteries
Midnightsun wrote:May not happen until end of season as I am still studying every I need to know. Have ordered the batteries and charger though.
Some things to consider:
The alternator issues are partially served if you use conventional lead acid batteries for your start/gennie. That will prevent the alternator from frying itself if the BMSturns the lithium’s off while they are charging.
The other issue is that your alternators can toast themselves running full tilt while trying to match the charge acceptance rate of the lithium’s. Alternators with an external regulator which has temp sensing and the ability to set the highest charge rate of the alternators will help.
The other issue you will face is keeping the cells in balance, and also protecting against a spike charge when originally connecting the lithium to the lead acid systems. If the cells are out of balance to the point that one goes past the low or high set point, the BMS will shut the battery off. While your alternators would be protected with a properly set up ACR or battery combiner continuing to charge the lead acids, you still might experience a dark ship event, which might not be pretty, depending upon where you are located.
- Helmsman
- Commander
- Posts: 323
- Joined: May 9th, 2016, 9:16 am
- Vessel Info: Temporarily Boatless
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Re: Lifepo4 Batteries
https://gilwellbear.wordpress.com/
Hope that helps.
- denders
- Deck Hand
- Posts: 77
- Joined: August 24th, 2015, 6:21 pm
- Vessel Info: 1985 Carver 3607 Aft Cabin
- Has thanked: 2 times
- Been thanked: 19 times
Re: Lifepo4 Batteries
- bud37
- Admiral
- Posts: 4689
- Joined: April 23rd, 2015, 10:22 pm
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Re: Lifepo4 Batteries
Should be a sticky.
-
- CYO Supporter
- Posts: 5819
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: Lifepo4 Batteries
- Helmsman
- Commander
- Posts: 323
- Joined: May 9th, 2016, 9:16 am
- Vessel Info: Temporarily Boatless
- Has thanked: 71 times
- Been thanked: 42 times
Re: Lifepo4 Batteries
Helmsman wrote:Source of the postMidnightsun wrote:May not happen until end of season as I am still studying every I need to know. Have ordered the batteries and charger though.
Some things to consider:
The alternator issues are partially served if you use conventional lead acid batteries for your start/gennie. That will prevent the alternator from frying itself if the BMSturns the lithium’s off while they are charging.
The other issue is that your alternators can toast themselves running full tilt while trying to match the charge acceptance rate of the lithium’s. Alternators with an external regulator which has temp sensing and the ability to set the highest charge rate of the alternators will help.
The other issue you will face is keeping the cells in balance, and also protecting against a spike charge when originally connecting the lithium to the lead acid systems. If the cells are out of balance to the point that one goes past the low or high set point, the BMS will shut the battery off. While your alternators would be protected with a properly set up ACR or battery combiner continuing to charge the lead acids, you still might experience a dark ship event, which might not be pretty, depending upon where you are located.
- Midnightsun
- CYO Supporter
- Posts: 2856
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 257 times
- Been thanked: 1103 times
Re: Lifepo4 Batteries
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