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I would like to say thanks for all the input, my pump is a small pump, but my heater is a 19kw (240v), I'm sorry for the misleading, it's on a timer due to cost of electricity, it runs for approximately 10 min then off for 20 min, it runs this regiment 24hrs a day, this keeps my shop...

I'm new to solar, I'm trying to learn how to take my radiant floor heat solar/battery power, I've got a small circulation pump (120v) , and a tankless 19W electric heater, where do I start? How many solar panels? How many batteries? I'm so confused. Thanks in advance