me, i have the BMG Solar Heater...advantage is 24/7 hotwater...pero minsan kapag gabi kailangan mo pang hintayin (about 5 minutes) kasi at night since walang sun (of course) naka tap siya sa electricity...

also dapat naka linya ang bahay mo ng hot and cold, if not ipapa linyo mo ulit...

sa computation ko against the traditional heater in two years naka bawi na ako...