Change charger markers

[dav1312]

Use more or less lightnings to indicate charging speed and colors for the status of the charger makes it more intuitive

• Lightnings

  • One lightning: <11kW
  • Two lightnings: ≥11kW and <50kW
  • Three lightnings: ≥50kW and <150kW
  • Four lightnings?: ≥150kW

• Colors

  • Green: operational
  • Blue: in use
  • Orange: partly operational
  • Red: not operational
  • Gray: unknown status or not working right now (planned ot temporarily unavailable)

Example icons:

Operational (without automated status) semi-fast charger	Currently in use with automated status slow charger	Partly operational semi-fast charger
Not operational fast charger	Planned for future date	Temporarily unavailable

[webprofusion-chrisc]

Seems good, but the icons will be very small on some devices, our icons are generated from an SVG template: https://github.com/openchargemap/ocm-docs/tree/master/Branding/batch-scripts - the aim there is to have a minimal amount of SVG manipulation so they can't go out of sync with each other. It's been years since they were updated however.

Red doesn't work for me for non-operational as it's a bit too much like a power indicator, greyed out is better for non-operational or temporarily unavailable. Perhaps planned for future date could be a calendar icon?

Changing away from Orange for rapid chargers is problematic as it's kind of a defacto standard shared by plugshare, so the mindshare is already there.

We don't generally have realtime status, so the in-use one would currently be redundant for us.

I do agree its difficult to visually distinguish power levels, and just putting a number doesn't work because it looks like an equipment quantity. There is a quite a lot of prior art for this now, we should take stock of what other people are doing before deciding.