The solar hot-water storage tank
may need periodic inspection and topping off, and various valves, pumps and sensors can sometimes need replacement.
When the solar collector can provide the heating capacity more than needed, the excess heat is stored in the hot-water storage tank
They consist of one or more collectors, insulated piping, a circulating pump, an expansion tank, a hot-water storage tank
, a heat exchanger, solar fluid (usually a solution of water and nontoxic propylene glycol antifreeze), a controller, and some valves and gauges.
Check that all hot-water storage tanks
and pipe work are adequately and fully insulated.
For example, Winn is adding more volume to its hot-water storage tanks
so that they become more efficient, especially during high-use times such as mornings and evenings.