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Hylas Discussion / Re: LiFePO4 batteries
« Last post by snailor on November 30, 2020, 02:51:49 PM »
We replaced our three 8D Lifelines with three Relion 8D LiFePO4s two years ago.  We've kept our two Lifeline 4D AGMs for our starting/backup house bank.  It was a little bumpy at first and it took me a while to zero in on something approaching optimal settings for all of our charging sources.  I probably had the most trouble getting our Victron MPPT controller to cooperate followed by several rounds of adjustments to our Balmar MC-614 regulator.  I also replaced our main charger/inverter with a Victron 2,000 watt model that's supposedly smart enough to deliver the right charging profile for lithium Batteries.  We still use our other three chargers in parallel using their AGM settings and this seems to work just fine.

In our experience the lithium batteries work well with AGM settings but we've managed to optimize settings in equipment having that capability.  I think Relion recommends a charging voltage for their 8D of around 14.2V but I think its okay to go up as high as 14.6V - similar to AGMs.  However they also recommend holding charging current to 50A.  Since we have two banks 1X8D (300AH) and 2x8D (600AH) we runup to as much as 80-90 amps and see no distress in either bank. We wish we had room to even up the two banks with 2X8D each but alas the first bank only has physical space for 1 8D and 1 4D. 

Our main house alternator is a Balmar 210 amp controlled by the MC-614 regulator equipped with both alternator and battery temperature sensing.  We monitor the two banks through two Xantrex LinkPROs and a Victron monitor as well.  These have alarms set should the battery or alternator temperatures rise above the recommended 60 degree C limit.  At the moment we've limited the charge levels using the internal settings (which escape me at the moment).  I think we can go higher but I sometimes worry how hot the alternator getting hot in warm weather while charging at full capacity.  In any case we find we can run the batteries down to 50% and be back up to near capacity  in a couple of hours of motoring.  We occasionally run them even lower than 50 percent but old habits die hard and I think even ReLion does indicate the cycle life is shortened by deeper discharges.  Nevertheless, these things are supposed to go 5-6,000 cycles through deep discharge so they'll probably outlast me.

One other thing I did was to install an echo charger from one of the house batteries over to the AGM bank to provide a load to the alternator at all times - even if the internal BMS in the lithiums disconnects them from the alternator.  This is a safety measure to prevent blowing the diodes out of the alternator if that ever happens.  It also keeps the starting bank fully charged. So far we've never seen high charging temperatures or signs of overcharging with our system.  Overall we're pretty satisfied with the performance of the new batteries. One thing I like is these lithiums can discharge pretty far without experiencing much of a voltage drop.  They also have low internal resistance and therefore charge much faster that we were able to achieve with the AGMs.

If I had any advice it might be to stick with one manufacturer for as much of the system as possible.  It would make the programming and integration simpler and easier to follow.
Hylas Discussion / Re: Bow Thruster Retrofit on Hylas 46 #61
« Last post by Ripple on November 30, 2020, 02:11:48 PM »
Our boat is in Trinidad currently so specific pictures of our bow thruster are not possible. Only pictures I have are of the hatch to the bow thruster motor and holding tank and another of a view through the hatch. JR
Hylas Discussion / Sticky Sheaves in H49 Whitlock steering system
« Last post by Dealatis on November 29, 2020, 01:10:53 PM »
H49-035 was fitted with the Whitlock/Lewmar
Hylas Discussion / Re: H49 chain plates
« Last post by Dealatis on November 29, 2020, 12:18:21 PM »
An update on chain plate project.  I rebedded all 8 chain plates at deck level.   Detensioned and Removed shroud/stay from chainplate,  then fun starts.  After removing deck cover plate, dug out all old caulking, inspected carefully this area for pitting corrosion  and though some moisture had gotten in found no serious pitting in S/S chain plates.  Inspection below deck was possible on the backstays and stbd cap shroud.  All others would require some carpentry work as far as I could tell.  The inner forestay and forestay chain plates are different designs and rebedding was not attempted.  I used life caulk but have been advised life seal or sika flex is a more durable choice.
Experienced Hylas Yachts / Re: WANTED - Hylas 47/49 or Stevens 47
« Last post by alex-neural on November 29, 2020, 05:32:09 AM »
I currently consider only US market.

Best regards,
Just thought I would put Manketti forwards in the discussion I know she is in Spain and is a European version ie CE marked but she is beautiful and ready to go you can see her on the site below but please reply directly to me and I can pass one the brokers charge as a discount!
Experienced Hylas Yachts / Re: WANTED - Hylas 47/49 or Stevens 47
« Last post by alex-neural on November 29, 2020, 05:30:29 AM »
Tony, H54 is certainly way out of my needs, sorry, I mostly interested in Hylas/Stevens 47 and may consider some H49.

Not sure if you have any interest in a 2005 Hylas 54?
Detail (including recent survey) at . She is in Tampa Florida and the price is negotiable.


Hylas Discussion / Re: LiFePO4 batteries
« Last post by jt11791 on November 28, 2020, 05:53:15 PM »
I just took the plunge and replaced our six 8D AGM batteries with four ReLion LiFePos.  I had to hire some yard guys to remove the heavy AGMs, but otherwise I did the work myself.  It was close to a "drop in" replacement.  I changed the charging profiles on my inverter/charger, alternator regulator, and solar controllers, but made no other changes.  My main concern is that my batteries are scattered around the boat and the cable lengths are all different.  I'm told this may be a problem as the batteries will see slightly different charging voltage, but I will monitor closely and time will tell if I need to make further changes. 

Here's the best part:  6 AGM @150lbs each = 900lbs  while  4 LiFePo @75lbs each = 300lbs.
And:  6 AGM @50%DOD = 750aH usable capacity while 4 LiFePo @80%DOD = 960aH usable capacity.

Anyone else make the conversion?  Share your experiences here and we'll build up some group knowledge.
Experienced Hylas Yachts / Re: WANTED - Hylas 47/49 or Stevens 47
« Last post by Dealatis on November 28, 2020, 04:25:01 PM »
H49-035, San Diego, pls call if interested 6198043627, jack
Hylas Discussion / Re: Bow Thruster Retrofit on Hylas 46 #61
« Last post by Patience on November 28, 2020, 01:12:43 PM »
Hi Todd
I sent email w photos.
Hylas Discussion / Re: Bow Thruster Retrofit on Hylas 46 #61
« Last post by Mazu on November 28, 2020, 11:42:39 AM »

I have 46-75.  Retrofitted a bow thruster, Vetus BowPro902.  The shower seat was modified and it was put into that space.  I actually like the shower seat better in its new version.  This was significantly easier than modifying the holding tank option.  I have used this for 2 seasons now and am very happy with how it turned out. 

happy to answer any questions.


I'd be very interested in touching base.  I tried to directly send you an e-mail from this forum.  Not sure if it worked. I cal be reached at


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