KwikSol 150L 400kPa Indirect Solar Geyser. Water-heating cylinder for a compatible solar geyser installation. Kwikot Kwiksol SOL-150-IND cylinder with 150L capacity and 400kPa operating pressure. Indirect solar-water-heating configuration with electric backup. Uses a separate heat-transfer circuit suitable for a correctly designed frost-protected system. Collector, heat-transfer fluid and installation are separate requirements.