Pro preview — the full-system audit

The free calculators size one component at a time. The failures that sink real solar water systems live between the components — a pump that stops every night and depressurises the main, a 24-hour treatment train fed by a 7-hour solar pump, a sheet sized well below its own stated demand. This preview runs the guide's TC-4 worked example through the whole pipeline (demand → array → pump curve → daily production → between-component audit → one assembled report) and lets you set the between-component facts.

Preview. The physics here is fixed to the guide's TC-4 example (13,120 L/day demand, 290 W panels, 4 in series, Grundfos 11 SQF-2 at 60 m). The Pro product takes your own project. The report is an unsigned computational output, never engineering sign-off. Nothing here is behind a paywall — payments are not enabled.
Project
Storage & distribution (night-stop contamination check)

A solar-direct pump with no pressure-decoupling storage stops every night; the main depressurises; without a backflow safeguard that is a drinking-water ingress path. Leave a field unset to see how the audit treats a missing safety fact — it is never assumed safe.

Treatment (diurnal-balance check)

A 24-hour train fed by a daylight-only pump (~7 h of producing hours in this example) delivers about a third of its rating while every unit looks correctly sized.

Scale self-consistency check