Here are the newest numbers. System been logging for 7198 hours, that is 2 hours shy of 300 days. In those 300 days the system has used 440 kwh of power.
So that is 1.5 kwh a day, at $.12 a kwh, that is $.18 a day for 120F water. We have not run out, system hasn't broken, and no signs of it breaking anytime soon.
300 days for hot water for $80.
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שְׁמַע יִשְׂרָאֵל ה' אֱלֹהֵינוּ ה' אֶחָד
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