Idiot's guide to a self build battery

[Oldgreybeard]

I have used these fused switches for the battery isolators. They feel like something from Frankenstein when you pull the lever to break or make the circuit: https://www.bimblesolar.com/DC-fused-disconnect-2pole

[Joeboy]

I have used these fused switches for the battery isolators. They feel like something from Frankenstein when you pull the lever to break or make the circuit: https://www.bimblesolar.com/DC-fused-disconnect-2pole

That's what I'd be looking for, you know where you are with that!

[Joeboy]

When building packs for electric bikes years ago I just used to parallel up all the new cells to form one big cell and leave them all on charge for a day or so. Doesn't matter if they are absolutely fully charged or not after that time, near enough is good enough as they will all be in near-perfect balance with each other by then. The BMS doesn't then need to do much once the pack is rearranged so the cells are in series as the pack starts off in good shape.

For anyone down the road who finds us and is thinking of doing similar in a DIY build.

'Batteries wired in series will have their voltages added together. Batteries wired in parallel will have their capacities (measured in amp-hours) added together.'

To be honest, I have to think this one through every time. It's a handy stop off point and stops me making mistakes.

[Stinsy]

They feel like something from Frankenstein when you pull the lever to break or make the circuit:

Breaking a high-current DC circuit is no joke!

[Oldgreybeard]

They feel like something from Frankenstein when you pull the lever to break or make the circuit:

Breaking a high-current DC circuit is no joke!

Indeed not, but these shouldn't ever really need to do this, as the master button on the top Pylontech turns all the batteries off gracefully usually. I do like being able to see the air gap between the contacts when the switch it off, though, gives a positive reassurance that the circuit is definitely open.

[nowty]

I use these for isolating my battery banks, seriously strong sprung handle but they were only £18 when I bought them.
https://www.ebay.co.uk/itm/353205382312 ... SwcgdfYsqe




And then forklift fuses for each battery bank back to a common heavy duty bus bar.

[Fintray]

I have used these fused switches for the battery isolators. They feel like something from Frankenstein when you pull the lever to break or make the circuit

[Oldgreybeard]

I have used these fused switches for the battery isolators. They feel like something from Frankenstein when you pull the lever to break or make the circuit

That's the bit they remind me of!

[ALAN/ALAN D]

Is the Black cable there to test how Quick the fuse BLOWS.

[Joeboy]

Here's to all of you guys for all the help and advice!

Power is off here again yet the freezer box leaves me with no fear! Just can't seem to get energy storage out of my mind.