Off-Grid Solar Sewage Treatment Systems

Traditional packaged sewage treatment plants rely on grid power for blowers, pumps and PLCs. In remote villages, mountain homestays, islands and eco-tourism parks, extending the power line costs more than the plant itself. A pure solar-powered sewage treatment system​ solves both the energy and the discharge problem.

• PV array (mono-Si, ≥22%)​ converts sunlight to DC; an MPPT controller​ charges a LiFePO₄ battery bank​ (3–7 rainy-day autonomy).

• Stored DC/AC powers A/O, SBR, MBBR or PV-MBR​ process units—driving aerators, mixers, return pumps and UV/disinfection.

• Smart EMS shifts high-load tasks (aeration) to sunny hours, switches to intermittent mode at night.

• Treated water meets Class 1A rural standards (COD<40 mg/L, NH₃-N<5 mg/L, TP<0.5 mg/L) for irrigation or reuse.

• 0.5–5 m³/d: single-household SMC tank + A/O + solar micropower (no battery backup optional)

• 5–50 m³/d: containerized PV-MBR, 800 W–5 kW panel, 48V/100Ah–200Ah gel/LFP battery

• 50–200 m³/d: SBR + 10–30 kWp PV + 2–3 day battery, NB-IoT remote dashboard

• No grid connection, no monthly electricity bill, CO₂ cut 1–2 t/unit·year

• 25-year panel life, sludge pumped twice a year, villager-level operation

• Perfect for Africa/SEA/LatAm rural projects, highway rest stops, livestock farms

👉 We build 1–200 m³/d off-grid solar sewage packages with CE/ISO options and cloud O&M.