Radio Vanuatu operates its shortwave transmitter now only with 1.5 to 2 kW. This should prevented any blackouts, especially since the manufacturer of the transmitter is no longer business and it is unclear whether spare parts could still be purchased for repairs.
Currently Radio Vanuatu names the following operating times for the frequency 3945 kHz, 18:30 - 22:30 & 5.30 - 12.15 UTC (morning and evening local time), for the second shortwave frequency 7260 kHz, 21.30 - 6.30 UTC (day time).
(Source: Paul B. Walker; as of 05.26.2015)