Hi Matt

I suggest you using opensource InkScape, unless you familiar with Adobe illustrator, Affinity Designer.

Get the component such as Generator, Bettery and other electrical representation from the web, google xxx.svg drag into InkScape draw those basic line and position. Save the file as svg, upload to Mango and put your datapoint value.

below are from the mango tutorial video. which is good starting reference.

https://docs-v3.mango-os.com/interactive-svg-graphics

https://docs-v3.mango-os.com/setting-values-from-dashboards