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Off-Grid Water

Technical resources, sizing calculators, and code-compliant plumbing schematics for residential rainwater harvesting, greywater recycling, solar well pumping, and off-grid water purification.

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Off-Grid Water

Published Technical Guides (25)

VERIFIED 2026 HARDWARE BENCHMARKCross-Referenced with US Lab Testing & National Codes

Off-Grid Water & Pumping Hardware Benchmarks

Empirical flow rate curves, dynamic head limits, and electrical power consumption for off-grid well pumping, cistern storage, and ultraviolet purification.

📊 Deep-Well Solar Submersible Pumps (Helical Rotor vs. Centrifugal)

Pump SystemMotor TypeMax Head (Lift)Max Flow RateInput Voltage (VDC)2026 System CostBest Application
Grundfos SQFlex 3-SQF-2Permanent Magnet Helical400 ft (120 m)14 GPM @ 50 ft30 - 300 VDC / 90-240 VAC$2,450 (Pump only)Deep wells (150-350 ft)
Shurflo 9300 Solar SubmersiblePositive Displacement Diaphragm230 ft (70 m)1.8 GPM @ 100 ft24 VDC (4-6A)$890 (Kit)Budget livestock & low flow
RPS 400 Pro Helical RotorBrushless DC Helical400 ft (120 m)5.5 GPM @ 100 ft72 - 120 VDC$2,199 (Complete solar kit)Homestead domestic + irrigation
SunPumps SDS-D-228Positive Displacement Diaphragm230 ft (70 m)3.8 GPM @ 50 ft12 - 30 VDC$1,280 (Pump only)Direct PV surface & shallow well

📊 Whole-Home Potable Water UV Disinfection Comparison (NSF 55 Class A/B)

UnitFlow Rating (30 mJ/cm²)Chamber MaterialPower DrawLamp Life (Hours)Integrated Solenoid2026 Price
Viqua VH410 (Home Series)18 GPM (68 LPM)304 Stainless Steel60 Watts9,000 Hours (1 Year)Optional Port$780
Viqua IHS22-D4 (UV + Prefilter)12 GPM (45 LPM)304 SS + Dual Sump50 Watts9,000 HoursPre-plumbed Bracket$1,350
Sterilight Cobalt SC-3208.5 GPM (32 LPM)304 Stainless Steel42 Watts9,000 HoursNo$540
TrojanUVMax Model G Plus37 GPM (140 LPM)316L Marine Grade SS110 Watts9,000 HoursStandard Port$2,690
Methodology Notice: Data synthesized from manufacturer submittals, UL test certifications, NREL System Advisor Model (SAM), and field installation audits conducted across US climate zones. Prices reflect Q1 2026 wholesale/retail benchmarks.