electrical:solar:shallow_cycling
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electrical:solar:shallow_cycling [2018/03/02 09:45] frater_secessus [how it works] |
electrical:solar:shallow_cycling [2018/06/16 20:47] frater_secessus [shallow-cycling] |
If **running larger loads** (fans, laptop chargers) the setpoint should be set higher (like 13.5v - 14.0v). This is because the panel will be able to make more power closer to Vmp. Consider the popular [[http://amzn.to/2you3Kj|Renogy 100w panel]] that puts out about 5.29A. At the lower LVR the panel((under lab conditions)) will make **68.77W**. At the higher LVRs the panel will make **71.42-74.06W** | If **running larger loads** (fans, laptop chargers) the setpoint should be set higher (like 13.5v - 14.0v). This is because the panel will be able to make more power closer to Vmp. Consider the popular [[http://amzn.to/2you3Kj|Renogy 100w panel]] that puts out about 5.29A. At the lower LVR the panel((under lab conditions)) will make **68.77W**. At the higher LVRs the panel will make **71.42-74.06W** |
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Note: running a small MPPT [[electrical:solar:charge_controller|charge controller]] would make this immaterial, as the controller would run the panel at max power (Vmp) at 18.9v. | Note: running a small [[electrical:solar:charge_controller#mppt|MPPT]] [[electrical:solar:charge_controller|charge controller]] would make this immaterial, as the controller would run the panel at max power (Vmp) at 18.9v. |
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Starter batteries are designed for about 15% depth of discharge((http://forum.solar-electric.com/discussion/comment/60412#Comment_60412)). We can set the Low Voltage Disconnect (//Vlvd//) to 12.5-12.6v as a floor. In a typical starter battery this could be 5Ah of power usable at night, enough to run an LED light for hours as well as run a small fan all night. All device charging should happen in daylight when power is relatively plentiful. | Starter batteries are designed for about 15% depth of discharge((http://forum.solar-electric.com/discussion/comment/60412#Comment_60412)). We can set the Low Voltage Disconnect (//Vlvd//) to 12.5-12.6v as a floor. In a typical starter battery this could be 5Ah of power usable at night, enough to run an LED light for hours as well as run a small fan all night. All device charging should happen in daylight when power is relatively plentiful. |
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If the starter battery (when it eventually dies a natural death) were replaced with [[electrical:12v:deep_cycle_battery#chain_store_batteries|a 12v wally world marine battery]] one might be able to cycle to 25% DoD. This would mean an Vlvd of ~12.4v and 8-9Ah of power at night. | If the starter battery (when it eventually dies a natural death) were replaced with [[electrical:12v:deep_cycle_battery#chain_store_batteries|the heaviest 12v wally world marine battery]] that would fit one might be able to cycle to 25% DoD. This would mean an Vlvd of ~12.4v and 8-9Ah of power at night. |
===== effect on starter battery ===== | ===== effect on starter battery ===== |
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electrical/solar/shallow_cycling.txt ยท Last modified: 2023/04/08 13:41 by frater_secessus