Differences

This shows you the differences between two versions of the page.

--- electrical:solar:pvwatts [2023/06/17 13:27]
frater_secessus [SYSTEM INFO]
+++ electrical:solar:pvwatts [2024/05/13 12:35] (current)
frater_secessus [PVWatts]
@@ Line 7: / Line 7: @@
   - find out how much panel is required to make a certain amount of Watt-hours (Wh) daily; or
   - find out how much power your existing solar setup can make
+**IMPORTANT:**  if you are depending on solar the system wattage **must be sized for location and least-sunny month** in which you will be camping.  For full-timers in the northern hemisphere this is **wherever you will be in December**.
 ===== how much panel do I need to make X watt-hours? =====
@@ Line 83: / Line 83: @@
   * your array size in **kW**.  A kilowatt is 1,000w, so a 200w = 0**.**2kW (zero-point-two)((the calculator is set up like this because it is designed to model large residential and commercial installations that are measured in kW))
-  * accept the default losses for MPPT systems.  PWM systems should use something like 30%
+  * accept the default losses for MPPT systems.  PWM systems should use something like 30%((PWM doesn't really have 30% losses in the system;  on average it leaves ~30% unharvested.  The end result is the same, math-wise))
   * if your panels are flat (most are) adjust tilt to zero

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