For rain peak hours are between 6pm – 11pm and off-peak between 11pm and 6pm the following day.
A gig cost 5cents a meg/ R50 a gig. If you add unlimited off-peak to your SIM you pay R250 a month and get 19 hours of unlimited data between 11pm and 6pm. Data used during 'peak hours' 6pm - 11pm will be charged at R50 a gig.