Hi, just FYI, Sarawak Energy Berhad has its own Rural Electrification Team called SARES doing the solar panels + battery system for the indigenous people, but 24 hours have constant supply of electricity for rural area is a big challenge as it depends on the usage of each houses and the SARES team have a maximum battery capacity that can be provided to each kampung/rumah panjang as battery is expensive.
Hi Ah Yau ... Solar panels >>> A roof with a 50°+ angle is considered too steep for a solar panel. The panel would likely be in deep shade for large portions of the day, which means that it will be unable to harness the power required. A roof with a pitch of less than 15° would be considered too shallow!