I-WLD1677C Anti-Reverse Flow Protection Device iyisixhobo esibalulekile sokuphepha esisetshenziswa ezinhlelweni zamandla ezisatshalaliswe (njengama-photovoltaic, ukugcinwa kwamandla, amandla omoya, njll.), eyenzelwe ukuvimbela ugesi ukuthi ungabuyeli emuva ku-grid, ukuqinisekisa ukuzinza kwe-grid nokuphepha kwemishini yomsebenzisi. Imisebenzi yayo eyinhloko ihlanganisa ukuqapha isiqondiso samandla, ukuvikelwa kokuhamba ngemuva, ukulawulwa okuhlakaniphile, nokuxhumana kwedatha, futhi isetshenziswa kabanzi ezimeni zokuxhuma amandla asatshalaliswe ku-grid.