Battery Build

[johnb2713]

I'm embarking on a battery build that will be similar in concept to a power wall / AC coupled battery. It has a 5kw Victron inverter / charger, 16 x EVE 280ah LifeP04 cells, Seplos BMS. I have designed a cradle for the cells to group them in 4's, the heavy current cabling being 25mm2 going into Anderson Connectors (175A). I intend to put a fuse in the circuit - 150 amp, my max running current will be 100amp.
My question is with regards to isolating the DC, I can pull an Anderson connector apart on any battery or I can fit a DC isolator which is adding another connection in the circuit. In terms of DC isolators I've seen Automotive / boat ones rated at 200A and above or proper solar ones but only rated to 80A.

This is going outside, on a wall, with heater and cooling fans etc.

Any thoughts?

 

[binky]

I'm embarking on a battery build that will be similar in concept to a power wall / AC coupled battery. It has a 5kw Victron inverter / charger, 16 x EVE 280ah LifeP04 cells, Seplos BMS. I have designed a cradle for the cells to group them in 4's, the heavy current cabling being 25mm2 going into Anderson Connectors (175A). I intend to put a fuse in the circuit - 150 amp, my max running current will be 100amp.
My question is with regards to isolating the DC, I can pull an Anderson connector apart on any battery or I can fit a DC isolator which is adding another connection in the circuit. In terms of DC isolators I've seen Automotive / boat ones rated at 200A and above or proper solar ones but only rated to 80A.

This is going outside, on a wall, with heater and cooling fans etc.

Any thoughts?

don't buy crap off Amazon is my first thought - made that mistake once already.

Soils always supply Keto, but shop around for pices as Altenergy were never the cheapest. You can get fuses to suite, and it's good practice to fuse +ve and -ve leads. NB you can get 2 fuse versions or just leave one fuse out.

https://www.alternergy.co.uk/pv-brand/jean-muller-keto-00-fuse-switch-disconnector

 

[johnb2713]

Soils always supply Keto, but shop around for pices as Altenergy were never the cheapest. You can get fuses to suite, and it's good practice to fuse +ve and -ve leads. NB you can get 2 fuse versions or just leave one fuse out.

https://www.alternergy.co.uk/pv-brand/jean-muller-keto-00-fuse-switch-disconnector

Thanks Binky, appreciated, just had a nosey around, not available anywhere.

 

[johnb2713]

The physical modules are going together and the inverter at long last has arrived. Massive difference in weight between Growatt and Victron.

 

[Ronski]

I'm going to be using the 160 amp version of this https://voltaconsolar.com/pv-dc-breaker-500v.html

Voltacon Solar can get it, but dealing with them is very slow going.

 

[johnb2713]

I'm going to be using the 160 amp version of this https://voltaconsolar.com/pv-dc-breaker-500v.html

Voltacon Solar can get it, but dealing with them is very slow going.

Ive just bought one of these on eBay, looks really good, sturdy construction, strong spring in the mechanism and well rated. £54

 

[Ucatchmydrift]

Ive just bought one of these on eBay, looks really good, sturdy construction, strong spring in the mechanism and well rated. £54

View attachment 14036

Thats the same one i bought! Mines the 200a version.
Seems like these may be in stock? :
https://www.renugen.co.uk/fuse-switch-disconnector-keto-size-00-body-battery-isolator/