This is what we're building.

Solar Chapter was born from a simple belief: clean water is a right, not a matter of luck. Founded by Mustika Wijaya and fellow Indonesian students in the US, the team started from scratch: volunteer-based, no formal structure, no guaranteed path forward. Our first project in Desa Umutnana built more than a solar-powered water pump. It planted the seed of a movement.

With impact from Desa Umutnana becoming visible (families farming, children going to school), the team understood that lasting change required consistent presence. The work shifted from project-based sprints to building real trust with communities over time, proving that sustainable water systems needed more than good technology.

Solar Chapter grew to 5 full-time staff and established branches, bringing in project-based collaborators and early institutional partnerships. Programs began scaling with more structure: community water committees were trained, village governance was strengthened, and the model evolved to ensure systems would outlast the team’s direct involvement.

A pivotal annual meeting reshaped how Solar Chapter thinks about scale. The team moved beyond two-year plans toward a long-term organisational strategy: systematising programs, diversifying funding, deepening collaborations, and building the internal capacity to support a growing team. Impact no longer just meant more villages; it meant a stronger organisation behind every drop.

From one village and a handful of volunteers, Solar Chapter now reaches 31,000+ people across 33 villages in NTT. A team of 33, spanning NTT and Java, carries forward the same founding belief: that water is a right, and that communities are partners, not beneficiaries. The journey continues, one village at a time.