Will a solar hot water system work with a combi boiler?
Combi boilers take water direct from the mains and provide instantaneous water and space heating without the need for a hot water storage cylinder and most combi boilers are not designed to take pre-heated water from a solar system. Connecting a solar system, although not impossible, can present some problems and it is always recommended that the householder checks with the manufacturer of the combi boiler to establish if it can be used with a solar hot water system. Generally there will be an increase in cost for installing a solar hot water system with a combi boiler. All solar systems require a hot water storage cylinder.