Water Pumping & Borehole Energy — Solar, Battery, Genset Backup & RFQ
Boreholes and reservoirs are the cleanest match to solar plus battery on any farm — a fixed hydraulic head, a predictable duty cycle, and daytime water demand. Genset is the exception, not the rule.
How are these load assumptions derived?
Figures are reference values from typical commercial projects — real numbers depend on climate, crop, motor selection (DOL vs VFD), controls topology and outage-risk tolerance. Use them to frame the RFQ; final sizing is confirmed by the winning EPC and OEM as part of the engineered proposal.
Reference figures. Real specs and pricing come from the qualified suppliers that respond to your private RFQ. SeedMatchGroup does not resell equipment.
Core loads: submersible or surface pump, VFD or dedicated solar pump inverter, telemetry and level controls, chlorination / dosing (optional), and reservoir aeration where relevant.
Sizing is by hydraulic power (flow × head × specific gravity / pump efficiency) — never by nameplate alone. Solar-direct topologies (no battery) are cheapest where a tank buffers demand.
Typical load assumptions
Continuous vs peak vs critical (must-survive-an-outage) loads by project scale. Motor starting inrush is 4–7× nameplate for direct-on-line and ~1.5–2× on VFDs — genset kVA must cover the worst-case inrush without voltage collapse.
| Project scale | Continuous | Peak / inrush | Critical load | Runtime target |
|---|---|---|---|---|
| Small borehole (<20 m³/h) | 1.5–5 kW | 4–12 kW | 1–3 kW | 6–10 h/day |
| Medium borehole (20–60 m³/h) | 7–22 kW | 20–55 kW | 5–10 kW | 8–12 h/day |
| Large borehole / reservoir feed | 25–75 kW | 70–200 kW | 20–40 kW | 10–14 h/day |
| Community / project water hub | 75–250 kW | 200–500 kW | 50–120 kW | 12–16 h/day |
Recommended generator & storage setups
Vendor-neutral reference stacks — diesel or gas generator, LFP battery storage, optional solar PV, ATS and controls. Hybrid stacks let solar and battery serve daytime load while the genset only starts on demand.
| Scale | Generator | Battery (LFP) | Solar PV | ATS / controls | Notes |
|---|---|---|---|---|---|
| Small borehole | None or 10–15 kVA rental | Optional 5–10 kWh | 3–8 kWp | Solar pump inverter | Solar-direct with elevated tank is cheapest. |
| Medium borehole | 20–30 kVA diesel backup | 10–30 kWh LFP | 15–40 kWp | VFD + ATS + level controls | Battery only if pump must run pre-dawn / post-dusk. |
| Large borehole | 60–100 kVA backup | 30–80 kWh LFP | 50–120 kWp | VFD + ATS + telemetry | Hybrid stack; genset only on worst design days. |
| Community water hub | 200–350 kVA prime | 100–250 kWh LFP | 150–400 kWp | EMS + SCADA + telemetry | Multi-pump, N+1 pump redundancy. |
- Elevated storage tank sized for 1–3 days of demand — buffers solar variability and delays genset starts.
- Solar pump inverter over battery + AC pump for the smallest sites (fewer components, longer life).
- Soft-start or VFD on any submersible above 5.5 kW.
- Remote water-level and flow telemetry as standard on all commercial installs.
- Genset sized to backup, not prime — solar is the primary energy source.
Related energy resources
FAQ
RFQ — Water pumping energy & backup
Prefilled from this energy application. Review and adjust — a dedicated sourcing specialist dispatches the RFQ privately to qualified global suppliers and integrators.