though your windlass will love you deeply and truly for the nice high voltage liFePo4 can supply even when nearly empty. First use for me on new LiFePo4 it was "Oh now you're awfully keen today"
The windlass does not care what supplies the current. Why would you let a battery go almost empty and then use it for a high current demand piece of equipment? Sounds like bad management to me.though your windlass will love you deeply and truly for the nice high voltage liFePo4 can supply even when nearly empty. First use for me on new LiFePo4 it was "Oh now you're awfully keen today"
The windlass very much cares what the voltage is. Why would you assume a flat battery? Sounds like you don't really know much about internal resistance or Ohms law.
The windlass very much cares what the voltage is. Why would you assume a flat battery? Sounds like you don't really know much about internal resistance or Ohms law.
Pull a load of amps from a couple of trojans the voltage will be way down. Just tried it. At rest with just house loads, (smartgauge says 93%) - 12.6V, run the windlass - 11.7V. Measured with a Fluke onto terminals.
LiFePo4 @ 25%SOC doing the same > 12.6V. For a motor that's huge. Which anyone who runs a windlass & swapped to LiFePo4 knows already just by the sound.
LiFePO4 batteries are now cheaper than AGM per usable AH.Windlass may but wallet certainly wouldn't.
Some of the cheap lithium should be treated with caution. I would consider Trojans to be premium batteries. Compare them with premium lithium such as Fogstar where the internal components are known and reputable and the difference is not so obvious. A 300Ah will cost you £850. You then have to add on all the other components such as smart shunt, fuse and holder and possibly a dc/dc charger
I saidd it does not care where the power comes from - just what it is. That is why you us a battery with a high CCA for a windlass - as suggested for the OP. No one has suggested using Trojans for this job so not a valid comparison.The windlass very much cares what the voltage is. Why would you assume a flat battery? Sounds like you don't really know much about internal resistance or Ohms law.
Pull a load of amps from a couple of trojans the voltage will be way down. Just tried it. At rest with just house loads, (smartgauge says 93%) - 12.6V, run the windlass - 11.7V. Measured with a Fluke onto terminals.
LiFePo4 @ 25%SOC doing the same > 12.6V. For a motor that's huge. Which anyone who runs a windlass & swapped to LiFePo4 knows already just by the sound.
View attachment 172203
You can, but you should add an alternator protection device which are about $80.
The lithium will take every single amp your 60A alternator can provide. It will do this constantly. The alternator is not rated for 100% duty. It will overheat and possible catch fire. There are some tricks to make it work but they are tricks on a suck it and see basis. Not where you really want to be. A new Victron dc/dc charger will do up to 50A, programmable. A way better solution
Because you will fry the alternator unless you use a regulator or a B2B. Solar is OK with an appropriate regulator. It is a complete misconception that you can just replace LA with lithium, although now it is becoming more practical as the lower cost of batteries mitigates the cost of the additional charging management to fit them.
That is true but the vast majority of leisure sailors pattern of usage means they will never be able to benefit from that. so they are popular with heavy users such as liveaboards, particularly in sunny climes but not viable for many to go to the expense of changing.
Its quite normal for lifepo4 cells to have the same charge/ discharge rate. In my case, my two lithium batteries can handle 385A at 24v charge or discharge. The 2 parallel BMS can handle 400A at 24v, in theory. We are limited by the 3000w inverter, which for most people is the limiting factor. For us that means about 125A but for most people on a 12v system, it is half that
Yep, on the bow thruster particularly also. Wow! I didn't know it could work as well as that. On winches on the lot, even the ability to flush the loo.though your windlass will love you deeply and truly for the nice high voltage liFePo4 can supply even when nearly empty. First use for me on new LiFePo4 it was "Oh now you're awfully keen today"
Correct as I showed to the reactionary lead lovers above, and note that it is multiple times cheaper when proper account is taken of the increased life expectancy.
Not so. That's a continual current discharge rate. You don't do that with a windlass, you use it for minutes only at that or maybe twice or three times that and such use is fine. A lithium battery also can give enormous current discharges when starting engines for example, but briefly, and that is also well within their discharge current limits.
