Beware that a SSR will need a heatsink if used anywhere near its ratings. (A PC CPU heatsink will work nicely.) A contactor will not and will be more efficient for this application. On the other hand, a SSR (or SCR/triac) can be used to throttle back the power with the proper control logic.
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To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...
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