Winston1990
Senior Member
For anyone interested I thought I'd share my standalone 3kw backup system build.
I had a Mecer 1440w/2400va modified sine wave inverter with 2x deep cycle batteries that were around 9 months old. I work from home full time and used it to power my laptop and occasionally TV/PC. I knew that I would need a new solution as the deep cycle batteries were not going to last forever and cost almost R6k each time to replace, and I wanted something which is pure sine wave so I can run my fridge if need be and a fan in the evenings due to the heat.
I did not want to connect it to my DB and go through the costs of installation, COC etc as I will probably be out of this place within the next year. So, I decided to build myself a standalone trolley backup system.
Components:
A lot of advise I received on another forum to keep the build legit and as safe as possible. Worked out a lot cheaper to do the build myself than buying a similar ready built system, and this system is solar ready or can be charged via a generator. I completed the build today and herewith the end result:
I had a Mecer 1440w/2400va modified sine wave inverter with 2x deep cycle batteries that were around 9 months old. I work from home full time and used it to power my laptop and occasionally TV/PC. I knew that I would need a new solution as the deep cycle batteries were not going to last forever and cost almost R6k each time to replace, and I wanted something which is pure sine wave so I can run my fridge if need be and a fan in the evenings due to the heat.
I did not want to connect it to my DB and go through the costs of installation, COC etc as I will probably be out of this place within the next year. So, I decided to build myself a standalone trolley backup system.
Components:
- 3kw Must 60A MPPT inverter 24v
- 2.56kw Must 100ah LiFePO4 24v battery (4,000 cycles)
- 125A DC fuse disconnectors
- 16A AC circuit breaker (Input)
- 30KA Surge Protective Device (Input)
- 25A Earth Leakage (Output)
- Onesto ready DB
- 25 sq mm battery cables
- All other wiring 2.5 mm
- 2x200ah battery cabinet
A lot of advise I received on another forum to keep the build legit and as safe as possible. Worked out a lot cheaper to do the build myself than buying a similar ready built system, and this system is solar ready or can be charged via a generator. I completed the build today and herewith the end result: