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Nickel-Iron technology Off Grid Solar Power

Q5: Off Grid - power components

The battery frame rack is welded and concreted into place.

Notice the staged height levels, so you see the water topping up in each roof of cells.

This is how you batteries arrive. These are 500 Amp hours batteries.

Plan the battery position carefully as shown,

Front view of the cage frame. Using 40 by 40 would be better than my 25 by 25 tubing.

The frame has to carry 800 Kg, thats 140 Kg per post, spanning 900 wide, on a 25 by 25 angle iron.(Later I added another angle iron because I didn't realize the batteries come with feet.)

So make your angle iron 40 by 40 and 3mm thick or 50 by 50 3mm thick. This picks up feet on bottom of batteries.

Notice the frames are welded upside down to the battery channels, checked for plumb.

Like so. Notice the staged height (red arrows)

Another angle iron added ontop of the other to add strength and wide for the feet under the batteries. See red arrows.

View showing staged height allows for viewing the water levels,

Purchase copper plates as a bar, shown in diagram form.

Next purchase lugs for the middle bank to continue as a long battery bank,

The lugs I found had 20 mm stud hole, but only a 16mm fixing hole.

Watch these terms. So I drilled out the fixing hole to 22mm diameter.

Purchased 500amp cable second hand, and got a hydraulic company (Pirtek) to crimp the 30mm diameter lug to 16mm diameter.

Nice job Pirtek !

How your battery bank should look.

Some advice about using battery vaseline on your posts to reduce corrosion.

Don't bother.

Vaseline does NOT conduct electricity.

Probes just a fraction apart in the vaseline.

Instead weekly keep batteries clean, wipe down, look after your investment.

These batteries cost me $9,000 dollars to get them to the power house.

They will last for fifty + years, so every penny looking after them is worth it.

Next we continue building the battery bank.

Ni-Fe battery technology

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