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Posts Made By:
BillG
Forum:
Lighting
02-18-19, 06:31 PM
Replies:
26
Outdoor Lantern Solar Solution needed
Views:
29,178
Posted By
BillG
Well, I said it before, but will say it again....
Well, I said it before, but will say it again. The number came from PVWatts. This is the gold standard tool, from the National Renewable Energy Lab, NREL. Since you used Sacramento, so did I. I...
Forum:
Lighting
02-18-19, 07:08 AM
Replies:
26
Outdoor Lantern Solar Solution needed
Views:
29,178
Posted By
BillG
Good. We agree on one thing. The 30 Ah battery,...
Good. We agree on one thing. The 30 Ah battery, utilizing 25% of its charge, is 90 Wh, not 225 as previously stated. 90 Wh is only enough for one single night, and will fail if there is a cloudy...
Forum:
Lighting
02-16-19, 08:23 PM
Replies:
26
Outdoor Lantern Solar Solution needed
Views:
29,178
Posted By
BillG
You lost me with the math. With using your...
You lost me with the math. With using your recommended 25% of capacity of a 12V 30Ah battery, I get 90 Wh, only 12.8 hours for the 7 watt LED that he wants to use.
Forum:
Lighting
02-16-19, 02:13 PM
Replies:
26
Outdoor Lantern Solar Solution needed
Views:
29,178
Posted By
BillG
Well, a 75% cutoff would then require (4) 24...
Well, a 75% cutoff would then require (4) 24 series batteries. That is too many to safely wire in parallel, in my opinion. I agree that the battery will last longer, but suggest using batteries...
Forum:
Lighting
02-15-19, 11:04 PM
Replies:
26
Outdoor Lantern Solar Solution needed
Views:
29,178
Posted By
BillG
Pool Man, there are a couple of things to...
Pool Man, there are a couple of things to consider regarding sizing of the battery and the panel.
1) How many days do you want the light to operate in the absence of sunlight?
2) How fast do...
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