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Black Friday Sale on Epoch Batteries at LFPexperts.com

The friendliest place on the web for anyone who enjoys boating.
If you have answers, please help by responding to the unanswered posts.

Barking Sands

Guru
Commercial Member
Joined
Dec 24, 2019
Messages
1,570
Location
New Port Richey, Fl
Vessel Name
M/V Intrigue
Vessel Make
1985 Tung Hwa Senator
Details to follow so but there will be a big sale on Epoch batteries with possibly the biggest discounts yet. Stay tuned for details. In the meantime if there are any questions, please feel free to ask here or message me direct.

 
Cool beans baby! I'm looking at the 460 essentials and it will fit in my space as it's smaller than the LiTime unit.
 
Just curious, what is the reason(s) to replace a LFP bank that is about 2 years old at most? These things are suppose to be good for say 3000 cycles. Are they worn out or did you damage them?
 
Not the whole bank, just House 1. House 2 is a parallel of (2) 300 AH LiTimes which work fine. House 1 is a 280 AH LiTime that I had FCP issues with. So I have 600 on one side of the switch and 280 on the other.

I can put the Epoch 460 on House 1 and the existing LiTime in my shed at home with the solar on the roof and replace the little battery with something that shouldn't run down ever. Even if I forget to turn the 12 volt lights off - :)
 
Details to follow so but there will be a big sale on Epoch batteries with possibly the biggest discounts yet. Stay tuned for details. In the meantime if there are any questions, please feel free to ask here or message me direct.

Well its Black Friday but can't find the 25% off epoch sale. Did I miss the boat on that sale?
Cheers J.T.
 
No sir..still going...
Go to Epoch Batteries and use code BF25
Let me know if you have any issues. Sending a PM.
Touch down Barking Sands and thank you. Ordered a 460 essential and will use it as a seconded house bank. I currently have 4 Epoch 100 amp batteries in parallel, and is limited to 4 batteries, so I'll have to have a separate bank with switching capability .
Thanks again and Happy Turkey Day week end to all
Cheers J.T.
 
House 1 is bottom of pic, the 280 AH Litime in a battery box that will be removed along with the battery. The platform the box sits in is a piece of work, a 2" wood frame around the box and on a sturdy platform.

54972912750_a250dac663_z.jpg


So the old batt and the box will be gone and the Epoch 460 will be cradled in there nice and I won't have to lift the 80 pound 460 up over the box, just up 2 inches into the frame. It's gonna be sweet!

1060 AH of lithium power!
 
Happy Thanksgiving to you too JT!
Thanks.
Well, I got my new Epoch 460 essentials battery with in a week and looking forward to the new install after the new year. Now comes the question about fusing this beast. My electrical demand is minimal and plan on stay with a 225 amp fuse using 2/0 cable to a 1/2/all/off switch which is rated at 300 amps. Will a 400 amp rated class "T" fuse holder with a 225 amp fuse be compliant with ABYC E11 standards? It's very difficult to find a definitive answer on the forum.
Cheers and happy holidays
J.T.
 
A class T is usually good for up to 400Ah battery, so you need to up it to meet ABYC IMO. 5000 per 100A
MERSEN came up in another discussion
 
Last edited:
A class T is usually good for up to 400Ah battery, so you need to up it to meet ABYC IMO. 5000 per 100A
MERSEN came up in another discussion
Yes, I've been trying to correspond with Mersen and Little Fuse but hitting a wall. Epoch suggested one of their dealers, but what they offered was just a 400 amp "T" fuse. Still just short what is needed for a 460 amp battery (25K AIC). I'll keep searching but wont need until spring.
Cheers J.T.
 
I think either of these two A3T fuses will fit in the Blue Seas class T fuse holder sold at your local chandlery, but you would be smart to check the dimensions yourself.



Both also, according to Mersen have an AIC of at least 50,000 Amps.
 
I think either of these two A3T fuses will fit in the Blue Seas class T fuse holder sold at your local chandlery, but you would be smart to check the dimensions yourself.



Both also, according to Mersen have an AIC of at least 50,000 Amps.
Yes, that's how I read it also. AI kicked in and noted that the fuse holder must be able to handle 50k AIC also. I'm not seeing that on the Blue seas spec sheet. Any Ideas on a holder with that AIC rating?
Cheers J.T.
 
As far as I know the fuse holder has no AIC rating. The holder is just some plastic for convenience of mounting, in these the fuse and cable are connected by a copper bar. If we are being pedantic, the cable has to also meet the AIC rating, and we know it won't take 50,000A.
 
AIC is not about the cable it's about the fuse. Of course the cable will not do 50000 amps, but it will do it longer than the fuse will. When the 50,000 amps hits the fuse it's going to explode in milliseconds. What happens after that event is is purpose. It has to interrupt that current w/o maintaining an arc.
 
AIC is not about the cable it's about the fuse. Of course the cable will not do 50000 amps, but it will do it longer than the fuse will. When the 50,000 amps hits the fuse it's going to explode in milliseconds. What happens after that event is is purpose. It has to interrupt that current w/o maintaining an arc.
Exactly. And in the event of a massive short like that, if the fuse failed to break the circuit due to insufficient AIC, then the cable will have time to heat up and burn, potentially causing a fire. Because the cable can't handle that amperage it's critical to make sure that a worst possible case short is still interrupted very quickly.

That said, resistance in the wiring (particularly as you get further into the system from the batteries) may limit the worst case short circuit current that needs to be interrupted. But for a primary battery fuse or the main system fuse I wouldn't count on that making any difference.
 
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