How do you get the Solaris Achievement?

[ChurchOrganist]

Decided to go for the Solaris achievemnt last night.

First of all I cut fuel to all steam boilers to end up on power supplied by 864 Solar Panels generating 52 MW at peak and 784 accumulators holding 3.9 GJ of power at maximum charge.

Left it like that for a bit - no achievement.

I then disconnected all the steam engines from the power network - still no achievement.

As this was supposed to be fixed in 0.13.7 I am now beginning to wonder whether it means real hours and not Game hours???

Can anyone shed light on where I'm going wrong?

EDIT: Forget that - I've just checked the achievements list and Solaris is now marked as earned - it did not flag up in the usual way, however.