200 GPD watermakers suit smaller cruising sailboats and 2-4 person crews. 500 GPD watermakers fit larger yachts, expedition vessels, and crews of 6-10. Power requirements scale roughly linearly: 200 GPD needs ~1.5 kW continuous, 500 GPD needs ~3 kW. The 500 GPD watermaker draws roughly twice the current. Most yachts running 24V systems need a dedicated charge management approach for either size — monitor battery voltage and run the watermaker during engine charging or when solar is at peak. Conservative estimate: 5 gallons/person/day for drinking, cooking, basic hygiene. Liberal: 15-20 gallons/person/day for showers and dishes. A 200 GPD watermaker covers 4 people at 5-10 gal each comfortably. Yes if your battery bank is >300Ah at 24V. Watermaker pulls ~125A at 24V, so 2 hours of operation = 250Ah consumed. Most cruisers run watermaker during engine running or when solar/wind generates excess. Tell us crew size and typical voyage length — we'll size the right watermaker for your vessel. Request a Quote Related guides: 200 GPD Watermaker Details · 500 GPD Watermaker Details200 GPD vs 500 GPD Watermaker: Which Portable SWRO Fits Your Boat?
Quick Sizing
Crew / Use Recommendation 1-2 people, weekend cruising Even smaller (~100 GPD) sufficient 2-4 people, multi-week cruise 200 GPD 4-8 people, expedition 500 GPD 8+ crew, charter operations 1,000+ GPD recommended Spec Comparison
Spec 200 GPD 500 GPD Output rate 200 gallons/day (~8.3 GPH) 500 gallons/day (~20.8 GPH) Power draw ~1.5 kW (12V/24V DC or 110V AC) ~3 kW (24V/48V DC or 110/230V AC) Footprint ~30" × 14" × 18" ~36" × 18" × 24" Weight ~110 lbs ~220 lbs Pump type CAT Pumps or compact APP Danfoss APP 1.0 or APP 1.5 Indicative price $4,500-7,500 $6,500-11,000 Power & Battery Considerations
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