Did that and got a reply from seller offering full refund. We'll see if they come through with that.
400A 160VDC T-Class Fuse Holder Melted
- Thread starter mwcolo
- Start date
In the meantime, while waiting on the blue sea holder and a different fuse, I've modified my spare according to some recommendations here.
Removed the thin metal extension pieces, added a bolt to the top so plastic isn't in the compression path, and bolted my lugs directly to the fuse legs (tinned copper to tinned copper). I didn't have a lock nut of the correct size but I should get the new holder before thermal cycling loosens it. I torqued it together pretty tightly. I'm still throttling current on this setup.
Removed the thin metal extension pieces, added a bolt to the top so plastic isn't in the compression path, and bolted my lugs directly to the fuse legs (tinned copper to tinned copper). I didn't have a lock nut of the correct size but I should get the new holder before thermal cycling loosens it. I torqued it together pretty tightly. I'm still throttling current on this setup.
I bought two of these. Funny enough they came with some wire connectors. First ones look like copper and were stamped 150A. Second ones look like cheap hobby wire connectors. I wasn't going to use either set as they weren't sufficient for my 4/0 wires, so I didn't think much of it. But it should've been a red flag to me.
Holy Moly….!
Zwy
Solar Wizard
The top 2 rated at 150A would carry 150A. It takes the right crimper to do those. I looked for 3 years and finally someone linked the crimper on an industry forum. The crimper works great. Nothing wrong with those terminals, just need the right crimper.
The bottom 2 might be for up to 8AWG, probably 10AWG. Use them for that purpose, with the correct crimper for those sizes.
Update: Monitoring heat at the fuse and connections with this setup for a few days now. Increased charge and discharge current up to 120A (around 6600W at charging voltage). No appreciable heat buildup, only slightly warm to the touch after a couple hours charging.
Did get my blue sea fuse holder but still waiting on a new fuse to fit the holder.
Still running good?
SniperX
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The same day you left a review, some other person did too saying the same thing. It is currently unavailable. You probably saved some people's property and possibly lives. Good for you to leave that review!
SniperX
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Tells me the kind of person you are! Outstanding. Most people can't be bothered to help others! Good for you too!Heh, that was me. I couldn't let it go.
Safety matters. I wouldn't want someone else to have their system go up in flames due to cheap components. I suspect that the seller started another product page using the same garbage.
SniperX
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I know. I am searching for a 300A DC breaker for my EG4 batteries to put between the battery and inverter and I can't find anything. Not an Ebay person and don't like to buy used, so finding an ABB or something is near impossible. I want quality.
A switch and fuses are what many of us are using.
SniperX
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I have a 400A t-class fuse, but it is the switch I can't find. I had a 200A one but SS just told me to use 300A.
The Blue Seas switches are top quality and handle 600 amps as I recall. But they are rated to 48 volts only and are not acceptable for a 48 volt system.
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Amazon has 225,250,300 and 350 amp fast blow T class fuses. There’s also nothing wrong with South Bend brand fast fuses
Blue Sea Systems 5119 FUSE A3T (CLASS T) 300-AMP https://a.co/d/bLxXsSQ
You can get that from NOARK. Wolfautomation.com can give you a quote on any of their offerings. I have the 250A version M2 which has a 20,000 AIC at 500VDC which is better than even class T fuse and is rated for 6,000 switching operations with no damage even under full load. The M3 goes up to 400A.
Call me uneducated. If the EG4 battery has a circuit breaker on the battery, why add a fuse inline?
Lt.Dan
Solar Wizard
Extra security/safety.
Yeah.. just imagine your main battery connection from a stack of server rack batteries shorts out. All the breakers will have to trip on all the server rack batteries to basically protect that single cable.
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