MG ETC model solar water heater is very competitive model in price compering to MG FPC, Here there no electronic conversion only heat conversion . heatabortion is with help of evaluated glass tube collectors . Heat depended on number of collectors used in. The capacity also calculated by them .there is no mechanism inside which works in the theory of succession force. We can expect a limited heat from this vacuum glass tubes. In rainy season it must require back-up electric heater for efficiency. It is not advisable for commercial or pressurised system.

This is evacuatedtubecollector. It is very popularin market because of low price. It is the union of rows of evacuated glass tubesand a storage tank. Most of the parts are imported ones. Its verycheap in cost by comparing to FPC model. Here vacuum glass tubes are the heat absorbent. The same tubes carry cold water and hot water without any separationwall. It is totally inactive at the time of rainy season.