As a newbie with no equipment, I am having trouble imagining how power is managed on the DC side of the system. I tried to find a solar system "simulator" or description, and have found nothing.
Here are a couple of scenarios.
1. Full sun @ noon, batteries have been in absorb for 2 hours, and are consuming about 1/2 the available PV power. No AC load on the inverter. Does the charge controller move off the MPP of the PV array as the the power to the battery bank decreases, so the array is putting out 1/2 capacity? Since power can't vaporize, it seems this must be the case. There is no load diversion in this example.
2. Same as 1) (absorb) a) A microwave oven drawing less than half the unused PV capacity is turned on for 5 minutes. Does the charge controller respond by moving towards the MPP to deliver the extra needed power, the power is drawn from the battery bank, some of both? b) A microwave oven drawing more than half of the unused PV power is turned on. Any difference than in a)?
3. Batteries are fully charged and not under charge, and it is still noon on a sunny day. a) There is no load on the inverter. Does the charge controller go open circuit to the array? b) Now, the microwave oven is turned on. Does the charge controller load the array to get the needed power, is power delivered by the battery bank, both?
If someone could answer these very basic questions or point me to a resource, I'd be most appreciative. I did try to find the answers elsewhere. Thank you!
Here are a couple of scenarios.
1. Full sun @ noon, batteries have been in absorb for 2 hours, and are consuming about 1/2 the available PV power. No AC load on the inverter. Does the charge controller move off the MPP of the PV array as the the power to the battery bank decreases, so the array is putting out 1/2 capacity? Since power can't vaporize, it seems this must be the case. There is no load diversion in this example.
2. Same as 1) (absorb) a) A microwave oven drawing less than half the unused PV capacity is turned on for 5 minutes. Does the charge controller respond by moving towards the MPP to deliver the extra needed power, the power is drawn from the battery bank, some of both? b) A microwave oven drawing more than half of the unused PV power is turned on. Any difference than in a)?
3. Batteries are fully charged and not under charge, and it is still noon on a sunny day. a) There is no load on the inverter. Does the charge controller go open circuit to the array? b) Now, the microwave oven is turned on. Does the charge controller load the array to get the needed power, is power delivered by the battery bank, both?
If someone could answer these very basic questions or point me to a resource, I'd be most appreciative. I did try to find the answers elsewhere. Thank you!
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