Newbie Help: Axpert (Voltronic) MAX 8000 PV electrical design

[Propalen]

Hello everyone!

I have been reading this forum, and it has been a great source of knowledge. Thank you all for sharing.

I have been designing a PV (Photovoltaic) system for my country house. I have extensive knowledge of electronics, but some power aspects are challenging for me since I usually work with low-power devices (3.3v...).

After reading and re-reading, I have designed the following system. I'm sharing the diagram, notes, and some questions.



Notes:

1. 2x Fuse holders. 2x 16A 1000VDC 10x38 fuses.
2. DC Surge Protector 2P 500V 20KA-40KA.
3. 2P 50A 400V AC Circuit Breaker.
4. 50A Main power switch
5. 40A/30mA Residual Current Device (RCD).
6. Household Appliance Circuit Breakers / Lighting / ... 25A/16A/...
7. 200A DC Fuse.
8. 12V 24V 48V 275A Battery Switch.

Questions:

1. Does the system seem appropriate to you? Is anything missing or unnecessary?
2. I haven't placed anything between the AC output of the inverter and the house electric panel. Some designs include a circuit breaker there. Is it necessary? Wouldn't the Main power switch, RCD, and circuit breakers in the distribution board be enough?
3. For protection between the battery and the inverter, I've installed a 200A fuse. Additionally, the battery has a switch connected to the BMS (Battery Management System). Is there anything else necessary?

More to come on the battery design itself!
Thank you!

 

[Propalen]

Is this the correct section to ask about the above system?

 

[Propalen]

Any help most welcome!

 

[DIYrich]

Rapid shutdown for panels. Battery switch rated for 60v. Lifep04 battery rather than li-on.

 

[Propalen]

Thanks very much for your help DIYrich,

Rapid shutdown for panels.

Do you recommend a circuit breaker or any other type of shutdown device?

Battery switch rated for 60v.

Ok. Is there a 60v 200A switch that you could recommend?

Lifep04 battery rather than li-on.

Why Lifep04 instead of Li-on? Just trying to understand

 

[LydMekk]

Because Lithium ION, NICAM et. a. are a fire hazard that should not be indoors in living areas.
This compared to LIFEPO4 which is more or less fireproof if handled properly.
Most modern premade batteries today consist of LIFEPO4 cells.

IMO.