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electrical:solar:slim_reserve [2020/01/19 19:56] frater_secessus [techniques] |
electrical:solar:slim_reserve [2022/10/11 19:32] frater_secessus [Slim battery reserves] |
====== Slim battery reserves ====== | ====== Slim battery reserves ====== |
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| FIXME: edit/organize |
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Note: this section is likely not appropriate for newbies; if the ideas are implemented incorrectly it could result in [[electrical:batterycide|battery murder]] and disappointment. | Note: this section is likely not appropriate for newbies; if the ideas are implemented incorrectly it could result in [[electrical:batterycide|battery murder]] and disappointment. |
[[electrical:solar:sizing#your_reserve_needs|Days of reserve calculations]] usually assume //poor solar harvest// == //zero solar harvest//. In reality this is almost always incorrect; //some// solar power is harvested even under dark overcast or rainy conditions. | [[electrical:solar:sizing#your_reserve_needs|Days of reserve calculations]] usually assume //poor solar harvest// == //zero solar harvest//. In reality this is almost always incorrect; //some// solar power is harvested even under dark overcast or rainy conditions. |
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> In light-colored full overcast I see yields 25% of usual. In dark full overcast, as when storming, I see yields 10% of usual. -- secessus | > In normal full overcast I see yields 20% of usual. In dark full overcast, as when storming, I see yields 5-10% of usual. -- secessus |
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A **fractional reserve** might be a half- or quarter day of battery reserve. This takes into account the (reduced) contributions from your solar, alternator, etc. It may also require going into voluntary [[electrical:solar:rationing|power-rationing mode]] when solar output is very low. | A **fractional reserve** might be a half- or quarter day of battery reserve. This takes into account the (reduced) contributions from your solar, alternator, etc. It may also require going into voluntary [[electrical:solar:rationing|power-rationing mode]] when solar output is very low. |
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In areas with abundant and consistent [[electrical:solar:output|insolation]] like the desert southwest, you may be able to run with no reserves at all. | In areas with abundant and consistent [[electrical:solar:output|insolation]] like the desert southwest, you may be able to run with no reserves at all, just enough make it through the night. |
===== techniques ===== | ===== techniques ===== |
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using less power | using less power |
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* Time-shifting loads to [[electrical:solar:nonessential|periods of excess power]] will help keep the ank fully charged until the sun goes down. | * Time-shifting loads to [[electrical:solar:nonessential|periods of excess power]] will help keep the solar fully-utilized and bank fully charged until the sun goes down. |
* finding and disabling [[electrical:12v:loads|parasitic loads]] | * finding and disabling [[electrical:12v:loads|parasitic loads]] |
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