US$ 30m in investment required to contribute to 50% RE goal. Wind Farm |Ha’apai Micro Wind | Outer Island Wind Data Collection. 2016-2018. √. √. MFAT/JICA. Current funding $40m TOP. 3rd Party Wind Generation. 2017-2019. √. √. ‘Eua Biomass | Tongatapu Biomass. ASAP. √. √. Current funding $4.6m TOP.