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diy solar

diy solar

Looking for bus bar suggestions

Welded three horizontal brackets to my battery rack and got two 1,8m (50x4mm) long copper bars from local scrapyard for 50e. Made six insulating bushings with lathe. Used lots of MG847 conducting paste plus installed two 60x60mm plastic wire canals for 40e. Could be prettier with shorter battery cables, but was aiming only for cheap and working.

6x10kWh rack with wheels and homemade busbars. Wire canal lids are still missing in this picture.
DIY copper busbars.jpg
 
Welded three horizontal brackets to my battery rack and got two 1,8m (50x4mm) long copper bars from local scrapyard for 50e. Made six insulating bushings with lathe. Used lots of MG847 conducting paste plus installed two 60x60mm plastic wire canals for 40e. Could be prettier with shorter battery cables, but was aiming only for cheap and working.

6x10kWh rack with wheels and homemade busbars. Wire canal lids are still missing in this picture.
DIY copper busbars.jpg
I was thinking of doing this with 1-5/8" unistrut because I've found that I need to expand my capacity from 6 batteries (30kWh) to 10. Then I figured I could mount the bus bars on the front left and right vertical struts with standoffs. Do you have plans for any plexiglass cover of the bus bars?

How does the "MG847 conducting paste" come into scope here?
 
Do you have plans for any plexiglass cover of the bus bars?

How does the "MG847 conducting paste" come into scope here?
Like I wrote: "Wire canal lids are still missing in this picture." so there are white plastic covers now. Actually those in picture are lids and I just added bottoms on them after connecting inverter leads to those busbars first. I wasn't aiming for exhibition-level result, just cheap and working.

These cheap copper busbars aren't tinned, so they will oxidize over time. You can see from the picture that I sanded all connecting points first. What you probably can't see I used MG847 to all connections to prevent new oxidation. MG847 is also higly conductive so I use it in every electrical connection to level out even smallest uneven surfaces between contacts. I used it on every mc4 connector, crimp lug and wire connector to make sure my 60kWp system works years without connection problems/fire hazards.
 

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