How to choose LPD
Count users and simultaneous peak, then calculate litres at storage temperature. Add distribution/standby margin and select the next standard capacity. Large plants require hourly profiles, recirculation and backup analysis.
100-5,000 LPD selection guide
Solar water-heater capacity catalogue
Compare every listed ETC and FPC capacity. SSmart uses 1 evacuated tube per 10 LPD and 1 FPC collector per 125 LPD, while keeping the 150 LPD FPC model at one collector. Final supply follows approved product data and site conditions.
| LPD | Evacuated tubes | Persons* | Area approx. | Tank options | Backup | Warranty |
|---|---|---|---|---|---|---|
| 100 | 10 tubes | 2-4 | 1.2 m² | SS304 / GI / glass-lined MS | Optional electric | As approved make/model |
| 150 | 15 tubes | 4-6 | 1.8 m² | SS304 / GI / glass-lined MS | Optional electric | As approved make/model |
| 200 | 20 tubes | 5-8 | 2.4 m² | SS304 / GI / glass-lined MS | Optional electric | As approved make/model |
| 250 | 25 tubes | 7-10 | 3.0 m² | SS304 / GI / glass-lined MS | Optional electric | As approved make/model |
| 300 | 30 tubes | 8-12 | 3.6 m² | SS304 / GI / glass-lined MS | Optional electric | As approved make/model |
| 500 | 50 tubes | 14-20 | 6.0 m² | SS304 / GI / glass-lined MS | Optional electric | As approved make/model |
| 650 | 65 tubes | 18-26 | 7.8 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 750 | 75 tubes | 21-30 | 9.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 1000 | 100 tubes | 28-40 | 12.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 1200 | 120 tubes | 34-48 | 14.4 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 1500 | 150 tubes | 42-60 | 18.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 1750 | 175 tubes | 50-70 | 21.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 2000 | 200 tubes | 57-80 | 24.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 2500 | 250 tubes | 71-100 | 30.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 2800 | 280 tubes | 80-112 | 33.6 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 3000 | 300 tubes | 85-120 | 36.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 3200 | 320 tubes | 91-128 | 38.4 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 3500 | 350 tubes | 100-140 | 42.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 4000 | 400 tubes | 114-160 | 48.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 4500 | 450 tubes | 128-180 | 54.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
| 5000 | 500 tubes | 142-200 | 60.0 m² | SS304 / GI / glass-lined MS | Project specific | As approved make/model |
* Persons assume roughly 25-35 litres of stored hot water per person per day. Shower, kitchen, laundry, hospital and process loads must be calculated separately.
ETC
Compact vacuum-tube solution with strong winter behaviour; inspect tube quality and manage hard-water scaling.
FPC
Robust glazed metal collector with serviceable hydraulic circuit; excellent for engineered commercial fields and indirect loops.
Results are educational preliminary estimates, not a quotation, guarantee or electrical/thermal design. Costs and performance vary with location, weather, shade, water quality, equipment, GST, transport, installation, subsidy eligibility, tariff and maintenance. Obtain a site survey and signed proposal.