The Q factor is the efficiency of the system and is the factor to ask your solar supplier for as this is given for example by SABS . MOST NB QUESTION OF ALL!!


Rather ask your supplier for the Q factor and compare systems this way .The rebate can be misleading on some systems .


ISS SOLAR for example have a 300l solar pump/controller evacuated tube system with a Q factor of 33 -- WORLDCLASS !! Top of the range for maximum savings. 

Approximate cost of this system

R28 000   cost including vat

R7500  eskom rebate


R20 500 nett cost - finance availible


Above includes duratherm geyser  / collector /solar pump / controller and installation voucher  --- componets are availible for the handyman .


SMALLER UNITS are availible with less capital outlay !!