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Post by gabzimiev on Jan 12, 2014 15:14:41 GMT 11
Thanks for the detailed info! A couple of questions if you have a sec: 1. I assume the yellow readout is cumulative, not current usage? Yep it was probably 0 when you got the solar installed. so spreadsheets out and record time of reading. not 100% sure i would need to google for the manual but yes if you don't see a blink and the arrow is going the other direction your exporting. not without extra hardware for devices you can unplug you use a clipsal ez audit www.clipsal.com.au/trade/__data/page/81/W1056.pdf you can borrow this from your library instead of spending $200 see this website for libraries which have one www.environment.nsw.gov.au/savepower/savepowerkits.htm for lights you just read the wattage on the globe. otherwise you'll make your money back on cost of the wattson solar with behavioural changes
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Post by Jim Hare on Jan 12, 2014 15:30:52 GMT 11
Thanks for the quick reply. Just had a longer look at the metre based on your explanations. I just calculated that the LED is blinking 21 times per minute, 1260 per hour. Did you say that 800 per hour is 1kWh, meaning we are currently using about 1.5kWh? Or do I have that completely wrong? Looks like we have exported 6,858kWh and imported 36,224. Am I right in saying that we first use the solar, export any excess, and import any deficit? In other words the solar that we immediately use does not appear in the export because we didn't sell it back? We have two inverters and when I combine their total output since the start it's about 27,000kWh. Does this mean we used about 20,200 and sold back 6,800?
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Post by gabzimiev on Jan 12, 2014 15:45:55 GMT 11
not sure about the led blink... i actually couldn't read your picture 100% of the writing under the led so if you could read it again for me.
yes solar generated 27 000 kwh you sold 6858 kwh back to the grid. so you used around 20,200kwh yourself so you count that as electricity not purchased ! so times that number by how much you pay 20-30c kwh and that's how much your solar has saved you $6k.
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Post by Jim Hare on Jan 12, 2014 15:53:53 GMT 11
Awesome! Slowly getting my head around it. Here's more metre detail:
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Post by Phoebe on Jan 12, 2014 15:59:06 GMT 11
I thought some got lost along the way, I forget what percentage, but not quite all you appear to generate on your inverters is usable electricity. I had never found a cumulative reading on my inverters before (I only knew the daily reading), but when Jim metioned in this thread I went and had a look and now I've found it, Eall is the cumulative reading and Etoday is the total for today, so we are both learning a lot from this discussion, Jim
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Post by Phoebe on Jan 12, 2014 16:02:58 GMT 11
Mine says 1600 imp/kwh and mine is single phase and 2 wires, so don't know if that makes the difference - perhaps Gab knows
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Post by Jim Hare on Jan 12, 2014 16:13:55 GMT 11
so you used around 20,200kwh yourself so you count that as electricity not purchased ! so times that number by how much you pay 20-30c kwh and that's how much your solar has saved you $6k. Plus I sold back 6,858 at 20ยข so there's another $1,371 in the kitty.
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Post by gabzimiev on Jan 12, 2014 17:25:08 GMT 11
800 Impulses/kWh = 1/800 kWh/impulses = 1.25 Wh/impulses so invert and convert to Wh.
26 pulses per minute * 1.25 Wh/ pulse = 32.5 Wh per minute
32.5 Wh per min = 32.5 Wh* 60 / 60 min (hours and minutes cancel) = 1950Watts instant
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Post by Jim Hare on Jan 13, 2014 10:16:57 GMT 11
That's fantastic! Thanks for taking the time to share your expertise and all the great advice. I learned a lot yesterday!
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