Why Solar Projects Fail After Installation
Post-mortems from 60 failed or underperforming installations point to four recurring causes — none of them technical.
- 01
Of 60 failures audited, only 8% had a root cause in equipment quality. The other 92% were governance, O&M, or procurement design.
- 02
The median failure occurs 14 months after commissioning — exactly when warranty attention ends and no operator has been funded.
- 03
Programs that ringfence O&M budget at the funding stage have a 5× lower 3-year failure rate.
The 14-month cliff
When we plot failure timing across 60 audited installations, a clear cliff appears at month 14. This is not coincidence. It is the point at which installer warranty visits end, donor reporting moves on, and no operating entity has been formally handed the asset. Systems do not fail because they break. They fail because no one is responsible for them.
Four recurring causes
1. No named operator
Handover documents list a ministry or NGO as the recipient, but no individual has performance obligations. When a fault occurs, escalation has no address.
2. O&M unfunded after year one
Capital budgets cover a 12-month warranty. After that, there is no line item for the technician visit, the cleaning crew, or the spare inverter board. The system continues to run on residual capacity until a single component fails and stops it entirely.
3. Procurement optimised for unit price
Lowest-bid tenders select vendors who have priced out the O&M reserve, the local technician retention, and the spares kit. The system arrives complete and degrades on schedule.
4. No measurement after handover
Without independent M&E, underperformance is invisible until total failure. By that point the recoverable window has closed.
Let's build reliable, sustainable solar solutions together.
Partner with Radiance Advisory for independent, high-quality advice that strengthens programs and delivers measurable impact.