opinion:frater_secessus:how_much_excess_solar_power
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opinion:frater_secessus:how_much_excess_solar_power [2022/12/14 13:50] frater_secessus [system efficiency] |
opinion:frater_secessus:how_much_excess_solar_power [2022/12/14 13:59] frater_secessus [overall system efficiency] |
===== empirical testing ===== | ===== empirical testing ===== |
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| Plug it in and see if the solar can support it [[electrical:solar:offthepanel|without affecting the battery bank]]. Easy peasy. |
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===== observation and prediction ===== | The downside is this is a YES/NO answer; it tells you a specific load will run but does not tell you about how much power is actually available. If you want to see the Bigger Picture then read on... |
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| ===== observation and prediction ===== |
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==== overall system efficiency ==== | |
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You can get a feel for overall system efficiency by | |
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- watching your system over time, as described above | |
- comparing real-time harvest to theoretical harvest | |
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**Example**: if you have 200w of panels and calculated cosine is .70 then **140w of light is landing on your panels**. | **Example**: if you have 200w of panels and calculated cosine is .70 then **140w of light is landing on your panels**. |
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==== system efficiency ==== | ==== finding and using system efficiency ==== |
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For [[electrical:solar:output|various reasons]] your solar setup will not be able to harvest all the power landing on the panels. For systems with PWM controllers the percent harvested will be something like 70%. For MPPT it might be 83%. These constants will be placeholders you can use until you figure out your specific system's overall efficiency. | For [[electrical:solar:output|various reasons]] your solar setup will not be able to harvest all the power landing on the panels. For systems with PWM controllers the percent harvested will be something like 70%. For MPPT it might be 83%. These constants will be placeholders you can use until you figure out your specific system's overall efficiency. |
opinion/frater_secessus/how_much_excess_solar_power.txt ยท Last modified: 2023/04/21 11:50 by frater_secessus