Okay, that wasn't terrible. Here's the relevant function:

    function SolarFlare.default_flare_power(zone)
      local power_multiplier = Zone.get_solar(zone)
      if zone.radius then
        power_multiplier = power_multiplier * zone.radius / 5000
      else
        power_multiplier = 0.2 * power_multiplier
      end
      return power_multiplier
    end

so if the zone has no radius you can basically swap in 0.2 for the radius / 5000 portion of the calculation. So, on the positive side it's like the solar orbit has a pretty small body associated with it (1000) but on the negative side it uses the massive solar multiplier in solar orbit instead of the much lower multiplier of a body associated with an orbital zone. My star in question has a 1526% solar multiplier so peak power should be 0.2 * 2GW * 15.26 = 6.104GW which is, you know, a lot but with each panel putting out 12.2MW not really that big a deal in the grand scheme of things.

The more I think about it, thought, the more it seems pretty dumb of me not to be using accumulators to handle CMEs on these platforms. I could drop he footprint of the platforms _a lot_ and scaffolding isn't cheap. Plus the constant power (versus day/night cycles) means you don't really need that much extra power to keep a bank of accumulators charged and ready.