Fitted a Midi fuse in a Victron Lynx Distributor. Is it OK?

balachai

New Member
I've found a workaround to fit Midi fuses into a Lynx Distributor, but I haven't energised it yet. The Distributor is made to hold Mega fuses, but unfortunately they're not available in amperages below 125A, at least not rated for 48 Volt systems.

Any problems with this? Here's what I did.

1. Made a fuse extender:
- Cut a 40mm long copper bar, mine is 19mm wide & 6mm thick but 3mm should be OK.
- Drill a 6mm hole, centre is 6mm from one end.
- Drill a 9mm hole, centre 20mm from the first hole centre.
- Lightly chamfer holes, debur bar edges, sand smooth & clean with isopropyl alcohol.

2. Attached the fuse extender to the Midi fuse:
- Bolt the Midi fuse to the extender using a 12mm long stainless M5 mushroom-head bolt with washer, spring washer & nut.

3. Made a M5 post:
- Put a big washer on a stainless hex head M5 bolt, 25mm long.
- Put it through the removable Victron plastic bolt holder.
- Add a large washer and a nut and bolt it down tightly, clamping the plastic between the two washers.
- Reinstall the plastic bolt holder.
- Add 2 more nuts and a large washer.

4. Installed the fuse:
- Place the extended fuse into the Lynx Distributor.
- Secure each end with lock washer and nut. M8 at the positive busbar, M5 at the other end.
 

Fraser

New Member
I've found a workaround to fit Midi fuses into a Lynx Distributor, but I haven't energised it yet. The Distributor is made to hold Mega fuses, but unfortunately they're not available in amperages below 125A, at least not rated for 48 Volt systems.

Any problems with this? Here's what I did.

1. Made a fuse extender:
- Cut a 40mm long copper bar, mine is 19mm wide & 6mm thick but 3mm should be OK.
- Drill a 6mm hole, centre is 6mm from one end.
- Drill a 9mm hole, centre 20mm from the first hole centre.
- Lightly chamfer holes, debur bar edges, sand smooth & clean with isopropyl alcohol.

2. Attached the fuse extender to the Midi fuse:
- Bolt the Midi fuse to the extender using a 12mm long stainless M5 mushroom-head bolt with washer, spring washer & nut.

3. Made a M5 post:
- Put a big washer on a stainless hex head M5 bolt, 25mm long.
- Put it through the removable Victron plastic bolt holder.
- Add a large washer and a nut and bolt it down tightly, clamping the plastic between the two washers.
- Reinstall the plastic bolt holder.
- Add 2 more nuts and a large washer.

4. Installed the fuse:
- Place the extended fuse into the Lynx Distributor.
- Secure each end with lock washer and nut. M8 at the positive busbar, M5 at the other end.
Sounds good. I have been dealing with same issues I ended up getting slightly bigger wire to warrant the larger mega fuses higher amp ratings. Now having trouble finding a combiner box. I’m actually thinking of connecting all my strings into a lynx power in. No idea if that’s the right thing to do. Seems like it should work to get 8 wires to 2. I have string fuses and isolators before that though. Can’t find anyone who can tell me if the lynx power in can do the 200 plus volts though.
Fraser
 

balachai

New Member
I’m actually thinking of connecting all my strings into a lynx power in.

I’m actually thinking of connecting all my strings into a lynx power in. No idea if that’s the right thing to do. Seems like it should work to get 8 wires to 2.
Yeah that should work. With some creativity you can also attach a fuse holder to the positive end lug and attach another 2 wires there.
 

balachai

New Member
Can’t find anyone who can tell me if the lynx power in can do the 200 plus volts though.
Oh good question - the lynx tech specs say 60V. But it's a very robust unit with good separation between positive and negative so I don't see why 200 plus volts would be a problem, excluding the fuses of course.
 

Fraser

New Member
Oh good question - the lynx tech specs say 60V. But it's a very robust unit with good separation between positive and negative so I don't see why 200 plus volts would be a problem, excluding the fuses of course.
Thanks for your reply. Yeah it works a treat. I’m using it. All my solar positive and negatives go to it and right on the ends of the lynx I run my cables off into the mppt.
 
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