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electrical:solar:slim_reserve [2018/06/19 12:27] frater_secessus created |
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. |
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===== fractional reserves ===== | [[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 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. |
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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, just enough make it through the night. |
| ===== techniques ===== |
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| making more power |
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| * [[electrical:solar:overpaneling|Overpaneling]] (having extra panels) is a key technique |
| * addimg [[electrical:12v:alternator|alternator]] or other forms of [[electrical:12v:alt_and_solar|additional charging]]. |
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| using less power |
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Days of reserve calculations usually assume //poor solar harvest// == //zero solar harvest//. In reality this is almost always incorrect; //some// solar power is harvested. | * 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]] |
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FIXME | |
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===== zero reserves ===== | |
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