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--- blog:2024-09-28:estimating_cost_of_electricity [2024/09/29 09:48] – [A Concrete Example] va7fi
+++ blog:2024-09-28:estimating_cost_of_electricity [2024/11/24 12:48] (current) – va7fi
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+~~DISCUSSION~~
+~~NOTOC~~
 ====== Estimating Cost of Electricity ======
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 If you look at the units carefully, you'll notice that they almost all cancel out except for \$\frac{\text{\$}}{\text{month}\cdot\text{W}}\$ ((The "hrs" of "24 hrs" cancels with the "h" of "kWh" since kWh means kW \$ \times\$ hr .))
-That number means that it costs 0.102784 %%$%% per month for each Watt of power that's continuously drawn.  So if you multiply that number by the power consumption of the device, the \$\text{W}\$ will cancel out and you'll get a result in \$\frac{\text{\$}}{\text{month}}\$, which is the monthly electricity price for that device.  For example:
+That number means that it costs %%$%%0.102784 per month for each Watt of power that's continuously drawn.  So if you multiply that number by the power consumption of the device, the \$\text{W}\$ will cancel out and you'll get a result in \$\frac{\text{\$}}{\text{month}}\$, which is the monthly electricity price for that device.  For example:
 \$$
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 Equipment on dedicated 12 V system that's on 24/7:
   * Internet modem, switches, and Wifi Boosts
-  * [[https://scarcs.ca/howto/echolink#sysop |Echolink radio and computer]]
+  * [[https://scarcs.ca/links/echolink#sysop |Echolink radio and computer]]
   * [[https://wcaredn.ca/setups/va7fi/home |AREDN hAP, two AREDN dishes, one AREDN VOIP Phone]]
 ))
-on a dedicated 12V system.  The system is fed with a high quality, high power 12 V charger with backup batteries and solar panels.  In the winter, the solar panels don't get any sun and the charger puts out a constant 75 W (and goes up when I'm transmitting).  In the summer, the solar panels provide about half the electricity needed.
+on a dedicated 12V system.  The system is fed with a high quality, high power 12 V charger with backup batteries and solar panels.  In the winter, the solar panels don't get any sun and the charger puts out a constant 75 W (which goes up when I'm transmitting).  In the summer, the solar panels provide all the electricity needed for up to 16 hours.
-That means that my internet and radio system costs me about $7.50 / month of electricity in the winter, and half that in the summer.
+That means that my internet and radio system costs me about $7.50 / month of electricity in the winter, a third of that in the summer.