Sizing battery calculation

[Dwill]

Hello,

I am working on sizing battery for a offgrid site and selecting the right genset. The load required 755A at 600 V (AC), 3 phases. It has 3 peak power demand a day( 10 sec 45 mins long) which add another 185 A to the load. Maintance will occur 4 times a year which batteries need to supply 342 A at 600V with no peak event ( duration of 3 hours need to supply)

- Total Peak demand 940 A at 600 V

This is just a theorical case which I need to select the most appropriate type and size of equipment to meet the energy demand.

I was just wondering where can I start doing my research about this case. I already have the load and the the power that it needs.

Questions:

-In general, when they give you the current and voltage for a load. can you simple calculate the real power from A&V or it is actually giving you the KVA? I am confusing as the info does not giving you any power factor.

-As I need to build a comparison of what is the best option for this load. where do I start my building my designing? starting on what type of genset is available in the market for this load or from the battery?

-What equipment do I need to considerate in a fuel generator with a solar arrays panel and the battery storage? I will not considerate the installation aspect or the switching process from gen to battery. I know converter inverted are involved

I would really appropriated a help in this case

[Mike90250]

> - Total Peak demand 940 A at 600 V


Good thing this is only theoretical. 564kva is not possible unless you might be in a nuke sub.

Real power for loads depends on the Power Factor (PF) of the load. Some loads are .6 and some .98.

In real life..... Your site with it's 940 A at 600 V load, would have 3 primary gensets, each one about 700kva, and maintainance is done on one, while a working spare is idle, and the 3rd is producing power.

https://www.americasgenerators.com/700-kVA-Perkins-Diesel-Generator-Non-EPA.aspx