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= Sunpower & Geyser =
 * Option1: Solar geyser, direct heating of water and solar geyser.
 * Option2: Retrofit current geyser.
   * Option2a: Add direct or indirect solar panel + controller +  pump to circulate.
   * Option2b: PV panel, with electric connection to current geyser.

= Option2b: PV(Photo Voltaic) panels geyser retrofit =
 * Highlevel.
   1. PV panels 100w - 220w generate DC power 20v-70v DC at 1-10 Amps each.
   2. Home power 220v (Not USA) AC
   3. Geyser element Resistance = 220v^2/3000w = +- 16ohms  for 3kW element.

 * Problem, is we cant just connect 220v AC and 50v DC in paralell as this would probably damame panel and push DC voltage into home electricity.

 * Solutions:
   1. Dual elements - use one for AC and one for DC [[http://waterheatertimer.org/How-to-wire-water-heater-thermostats.html]]
   2. Some complicated electric circuit with AC/DC filters.
   3. Electronic control with 3way relay. A.220v, B.50v DC, C.off  only one at a time.

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