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electrical:solar:shallow_cycling [2021/06/06 13:38] frater_secessus [how it works] |
electrical:solar:shallow_cycling [2022/01/28 20:50] frater_secessus pointed to micropower |
Note: this information should be regarded as experimental. It is [[https://boondockplan.wordpress.com/tag/shallow-cycling/|being tested]] by secessus. | Note: this information should be regarded as experimental. It is [[https://boondockplan.wordpress.com/tag/shallow-cycling/|being tested]] by secessus. Beginners may want to start with a [[electrical:solar:gentle_intro|gentle intro to solar]]. |
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| [[opinion:frater_secessus:car_micropower|Here]] is a trimmed-down version of this page. |
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====== microsolar without deep-cycle batteries ====== | ====== microsolar without deep-cycle batteries ====== |
Benefits: | Benefits: |
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* provides 12v power during daylight | * extremely inexpensive |
| * provides 12v power and USB power during daylight |
* will never deplete the starter battery so you get stranded | * will never deplete the starter battery so you get stranded |
* actively maintains the starter battery | * actively maintains the starter battery |
* the controller has built-in USB ports | * taking power from the controller uses less power than using the car's ACCessory position, since other car electronics are not being energized. |
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Instead of deep-cycling like someone might in an RV, the idea here is the starter battery can be used but never dragged below 100% state of charge)). | Instead of deep-cycling like someone might in an RV, the idea here is the starter battery can be used but never dragged below 100% state of charge)). |
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- a simple [[electrical:solar:charge_controller#shunt|shunt charge controller]] holds the starter battery at a medium Float voltage (13.2 - 13.8v, see notes [[electrical:solar:shallow_cycling#charging_voltages_and_starter_batteries|below]]) when charging, this is below the gassing point | - a simple [[electrical:solar:charge_controller#shunt|shunt charge controller]] holds the starter battery at a medium Float voltage (13.2 - 13.8v, see notes [[electrical:solar:shallow_cycling#charging_voltages_and_starter_batteries|below]]) when charging, this is below the gassing point |
- power is //only// taken from [[electrical:solar:charge_controller#using_load_output|the controller's LOAD output]];((or from a circuit control by a relay on the LOAD output)) this ensures the starter battery is never discharged below [[electrical:12v:lvd|the intended setpoint]]. Since the load is disconnected below 12.7v the battery cannot be run down by loads. | - power is taken from [[electrical:solar:charge_controller#using_load_output|the controller's LOAD output]]; this ensures the starter battery is never discharged below [[electrical:12v:lvd|the intended setpoint]]. Since the load is disconnected below 12.7v the battery cannot be run down by loads. |
- the controller's LOAD output disconnects when battery voltage falls to 100% ((LVD)) - no more power is provided | - the controller's LOAD output disconnects when battery voltage falls to 100% ((LVD)) - no more power is provided |
- the controller's LOAD output //re//connects when charging and battery voltage has risen to >= ~13.0v((LVR)) - power once again flows | - the controller's LOAD output //re//connects when charging and battery voltage has risen to >= ~13.0v((LVR)) - power once again flows |