electrical:solar:gentle_complexity
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electrical:solar:gentle_complexity [2017/11/09 13:32] frater_secessus |
electrical:solar:gentle_complexity [2017/11/09 18:51] frater_secessus [Gentle introduction, Pt 2] |
This is a collection of illustrations that things are more complex than can be revealed in [[electrical:solar:gentle_intro|a one-page intro]]. Again, drill down for more info. | This is a collection of illustrations that things are more complex than can be revealed in [[electrical:solar:gentle_intro|a one-page intro]]. Again, drill down for more info. |
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**Solar panel output will almost never be as high as the claimed output.** In fact it will probably hover around 75% of that number under the best conditions; this is called "[[electrical:solar:output#panel_temperature|derating]]", or correcting output to actual conditions. It sounds like fraud but it's not. A panel's power is expressed as a "nominal" rating like 100W as when tested under //laboratory// conditions. Since the roof of your van is unlikely to meet those same lab conditions, if you think you need 200W of panel you probably need 250W. | **Solar panel output will almost never be as high as the claimed output.** In fact it will probably hover around 75% of that number under the best conditions; this is called "[[electrical:solar:output#panel_temperature|derating]]", or correcting output to actual conditions. It sounds like fraud but it's not. A panel's power is expressed as a "nominal" rating like 100W as when tested under //laboratory// conditions. Since the roof of your van is unlikely to meet those same lab conditions, if you think you need 200W of panel you probably need 250W. |
**[[http://rvwiki.mousetrap.net/doku.php?id=electrical:12v:deep_cycle_battery#agm|AGM]] lead-acid batteries are not well suited to solar-only charging**. They cost about 2x that of FLA, have less capacity, require vigourous charging and cannot be charged as high in voltage. They remain popular because people think "$$$ is better" and are loathe to vent their banks. | **[[http://rvwiki.mousetrap.net/doku.php?id=electrical:12v:deep_cycle_battery#agm|AGM]] lead-acid batteries are not well suited to solar-only charging**. They cost about 2x that of FLA, have less capacity, require vigourous charging and cannot be charged as high in voltage. They remain popular because people think "$$$ is better" and are loathe to vent their banks. |
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| It is possible to have one all-purpose battery for both house and starting. This only works when [[electrical:solar:sizing#your_daily_power_needs|daily power requirements]] are quite low((40-50Ah/day)) or when [[electrical:solar:nonessential|opportunity loads]] are agressively utilized. |
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electrical/solar/gentle_complexity.txt ยท Last modified: 2020/10/11 19:48 (external edit)