Recent content by JimF

Thanks much @smoothJoey. good advice and sounds like what I am planning. 100A main battery fuse and battery switch very close to battery, then two branch circuits, one high amp breaker for inverter only and the other 25 amp breaker feeding a Blue Sea ATO-fused distribution block. Both medical...

@time2roll, why MEGA vs ANL if ANL has higher AIC rating? Blue Sea chart does appear to show the MEGA has a faster response for overloads > 150% … https://www.bluesea.com/products/5108/MEGA___AMG_Fuse_-_300_Amp

@smoothJoey - Wires/charger/controller …. Any device can sort out or fail and draw excessive current. It depends on the device’s tolerance, but having a fuse that allows double overcurrent for up to 300 seconds seems excessive and a danger to me. The MPPT controller, AC charger and the two...

I called to speak to a tech engineer @Easton who verified I am reading the time-current load cart correctly. 300 seconds is way too long for a overload shutdown. He recommended a current sensing circuit/relay. This starts to get way more expensive and complex than I planned for. Am still...

Even the Eaton “fast blow” Class T fuses appear to have even worse delays. I can’t easily format the AH vs time chart on my iPad, but the graph is here...

Yes, thanks @sunshine_eggo, that is exactly my concern. According to BattleBorn this morning, yes an ANL fuse provides enough protection, however there are many downstream components that can’t handle 150 amps, let alone 200 amps, for 30 seconds if they fail and short out or, as you point out...

Battleborn support says today that the BMS shuts down 100% @ 250A. They recommend an ANL or MEGA fuse type, along with a separate battery cutoff switch over circuit breakers. They recommended I upsize my cable leading to the primary distribution block from 4 AWG to 2 AWG for 1000 watt inverter...

Thx. I’ll call BattleBorn tomorrow and document what they say here.

Blue Sea 285 series breakers are marginally better response time than either Class T or ANL fuses. They are rated for between 10 and about 35 seconds @ 200% current, though AIC rating is only 3000A @ 48v - no idea if that changes for 13.4v. So I might use both a fuse and a breaker on the...

Thanks for the link @time2roll. 60 seconds at 200% seems a bit dangerous to me since It could overload the wiring. Do I need to upsize everything to handle 200-400 amps? That will be some expensive any unwieldy wire. Maybe both 110 A Class T fuse and a breaker? Have to locate that same type of...

I assume best to attach the class T fuse directly to battery terminal, then to battery shutoff switch?

Thanks @time2roll & @sunshine_eggo. I’m also read that class T fuses have much higher Amp Interruption Capacity (AIC) and are fast. I found one thread here that recommended putting class T fuses on both positive and negative terminals. I don’t know how fast the Battleborn Battery BMS shutdown...

Hello all, Newbie here. I am connecting a BattleBorn 100A battery to serve as backup for twp Pieces of medical equipmen. I also want to have the capability to use a 1000 watt pure sine wave inverter. I was going to put in a 100 amp breaker, or 100 amp ANL fuse along with battery shutoff. This...

Newbi here. I just bought a Victron 75/15 SmartSolar MPPT controller to connect 200 watts (2 x 100watt 12v Renogy) to a 100AH 12v SOK Lithium battery. The Victron manual does not mention using a ferrule, however it does state to use “.75 Nm” to tighten the terminals. Anyone know of a...