Sorry guys but as has been pointed out numerous times in other LFP discussions there is no such thing as LFP "drop in" no matter how much these companies want to get into your pocket and no matter how much we "wish" for drop in its not going to happen the way we wish
Ask yourself this.
What happens when you go over their HVE limit and the main contactor opens to protect the bank? Yep, you just blew up your expensive alternator.
How does this or any single contactor "drop in" system deal with breaking away wind
, shore charger and alternator safely while still ALLOWING the use of the battery bank? It does not because it is an inappropriate, one size fits all, approach.
end plates and draw beams, are well suited to a fork truck perhaps, but a boat...?? You going to have the height for those handles?
What is the quiescent draw of that contactor? Who's contactor is it? What type of disconnect loads can it handle?
What is the max charge current
during shunt balancing? Do they even know? Have they tested it? What temp do the shunts get to when balancing high charge loads? At 14.4V this bank will be actively balancing quite a bit. There is zero need to charge these banks at 14.4V other than opportunistic marketing
. There is only down side to this type of charge voltage, no upside other than to put money
in Balquon's pocket.
The CEO of Balquon told me over two years ago flat out 14.0V max charge voltage for the "application". I then tested, and tested and tested, and tested and came to the conclusion that 13.8V was an even better bet. Of course 14.0V is still far safer than 14.4V and will create far less balancing issues.. The CEO told me 14.0V and they sell one for 14.4V and the Chinglish Winston manual says 14.6V to 14.8V. Fun stuff huh....
You guys figure it all out, I already put hundreds & hundreds of hours in figuring out safe
charge voltages for frac "C" LFP. Some companies are getting it, others are opportunistic...
Why have they dropped to 14.4V from their other recommendations as high as 14.8V, which BTW is pure insanity?? I suppose because they are starting
to get it, just not fully get it quite yet... The other option is that they want
you to believe
these are in fact "drop in
" and by selling you something that charges at 14.4V they will have more opportunity to pry your money
from you because many chargers,regulators and such can easily do 14.4V but not 13.8V to 14.0V...
There is NO NEED for 14.4V or anywhere even close to that other than "drop in
.. It only adds dangerous levels of heat in the shunts and creates the balancing systems own need to be there doing the balancing. If they really
told you how to charge these batteries safely
yet very effectively
then you would need to spend a lot more money on other systems and you'd price yourself right out of a sale
One "drop in
" company already apparently learned the hard way. They used to allow 14.4V - 14.6V..
All of a sudden they now only allow a max of 14.0V.. Go figure...... But still good to see they are finally getting it....
Any well executed LFP installation
on a boat will be wired for a charge bus
and a loads bus
. On some boats this is considerable work. HVC & LVC level protections and warnings will ideally occur BEFORE the main contactor opens and disconnects the bank. I prefer HVC to be relay disconnects, of all charging sources, at the warning level, and this on top of audible alarms. These break away systems are well before the main contactor opens totally disconnecting the bank. This allows a charge device to fail yet you still retain use of the bank for discharge.. Breaking away charge sources should be be done properly so equipment
is not destroyed in the process.
Most "drop in's" do not account for any of this and, as is typical of Balquon, they have no available technical data to see if the BMS has additional ports
or programming to account for this type of installation
.? Done incorrectly you can easily destroy an alternator and even some controllers and wind
A good marine
LFP system incorporates all the necessary items for a marine
installation that may have multiple charge sources to deal with. This is why "drop in" with a single contactor does not work. It is a system
not just a battery. We are not in a warehouse with one lone charger we have multiple charge sources to contend with and any good marine install should deal with them and do so safely
Look at the Genasun system if you want an idea of how one of these installations should
My own system was done for a LOT LESS than the Balquon "drop in", and done to a higher standard, and is focused on actual use at fractional "C" levels, but it is far from drop in
Sorry for the rant I just hate it when the market wants something that can't really be done and some company does it anyway just to grab money... Caveat emptor on any LFP drop in.