Design Blueprint: Village Electrodialysis Unit — Build Specification Derived from the ED–RO Crossover Paper for Brackish Groundwater

DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. Build specification for a sized village electrodialysis unit derived from the source paper at https://doi.org/10.5281/zenodo.24109067: a 2.5 g/L borehole feed desalinated to 0.5 g/L, 5 m3/day product, 26 cell pairs at 10.50 A and 7.49 V stack voltage, 1.82 kWh/day (0.365 kWh/m3), 0.41 kWp photovoltaics (0.51 kWp with margin), design recovery 0.75 with a maximum recovery of 0.813 set by gypsum solubility on the stated water. Includes dimensions and layout, bill of materials, assembly sequence, operating envelope, tolerances, failure modes, maintenance, and the measurements a first build must make. No unit has been built or tested.