T&D built our pool and we have both solar and an electric heat pump. Solar only is good for about 9 1/2 months per year, but during cold winter months, when the days are short and the sun is low we need the heat pump. We also have a pool cover that we only use during the coldest times of the year. With the cover on the pool the solar will heat the pool some during sunny days but once the sun gets low we run the heat pump. With the cover always on unless we are using the pool, the heat pump works great. During the last week, when it was very cold, our heat pump kept the pool in the low 90 degree range. We have found that the heat pump uses about the same amount of electricity as our A/C uses during the summer months. Since we don’t use the A/C in the winter, the cost is very reasonable. I am not sure how well the heat pump would work with no pool cover. Also, the pool cover holds in chlorine so you need to adjust the pools chemistry when using the cover or the chlorine levels will get too high. Hope this helps.
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