HOW TO DESIGN?

[Sam Mills]

先生们好。我是菜鸟，现在正在做一个太阳能数学问题。我想设计一个太阳能离网系统，假设电压为380V，设计负载为448800W，并且需要将65％的蓄电提供给系统。我应该如何设计逆变器，电池，配电控制箱，充电控制器和太阳能安装支架？并且请告诉我原因，谢谢。

 

[Jon_K]

Translation

Hello gentlemen. I am a rookie and I am working on a solar math problem. I want to design a solar off-grid system, assuming the voltage is 380V, the design load is 448800W, and 65% of the stored electricity needs to be provided to the system. How should I design the inverter, battery, power distribution control box, charge controller and solar mounting bracket? And please tell me why, thank you.

 

[Hedges]

448880W, about 1/2 megawatt, is quite a large load, 20 times larger than large home systems individuals might install.
I assume you mean this is the continuous power, so you would consume 12 megawatt hours each day.

When you say, "65% of the stored electricity needs to be provided to the system" I am not sure what you mean.
Does 35% of electricity come from elsewhere, like utility grid?
Or is 35% from solar panels during the day and 65% has to be stored in batteries for night time use?

There are some vendors lf large industrial systems.
From SMA, here is a 2.2 megawatt battery inverter:

System Solutions & Packages | SMA Solar

Preconfigured, well-matched system components as complete solutions.

www.sma.de

A 75 kW inverter. I think multiple units possibly can work together to make a larger system.

Sunny Tripower Storage 60 (Successor: SMA Commercial Storage Solution) | SMA Solar

Information on the Sunny Tripower Storage 60 (no longer sold by SMA) ► discover the successor here!

www.sma.de

Separate photovoltaic inverters can be integrated in the system.

You should contact and get their recommendation of a system.

If your system is much smaller, please give us corrected numbers and we can be of more help.

 

[Sam Mills]

Ťhanks ,gentleman.What I need to add is that 65% of the entire energy storage system supplies the load, and the rest supplies the battery.