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Dave's Build Thread
#21
(07-15-2018, 09:09 AM)hbpowerwall Wrote: Black inverter looks good!

Yeah, I like it too. I ordered black cable trunking to match

I charged the batteries via solar only yesterday while powering the garage. Didn't get to fully charged. Thought i'd get through the night though as battery was at 55v but alas. Nope. Went flat at 3am  :/
Need a higher panel to cell ratio!
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#22
Not that I needed to see proof of concept, but yes, the thing works. With just the 2.5kwh of battery and 4 panels temporarily strewn across the lawn, I was able to keep the garage off grid and I could see a clear reduction in the total house energy use. Sweet. So now to get it properly up and running. 
It took me two days to install the rails on the garage roof. I'm sure a more capable person could do it in just a few hours, but a) i'm really bad with heights and I was doing this on ladders (yes its only one story up and yes I still cacked myself about it!) and b) I had to learn how to use an angle grinder as the tiles needed cutting so the brackets would fit. But finally today I got the rails finished. had some help from father in law too, which was nice.

Panels need a good scrub, then i'm going to lay them out on the lawn and make sure all cabling is long enough etc before mounting them on the roof. 
2kw of panels will charge 2.5kwh of battery pretty quickly wouldn't you say! So next task is to weld/solder up the rest of them.
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#23
Got the panels on the roof at last!
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#24
I can see space to fit another panel Big Grin
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#25
(07-22-2018, 10:34 PM)completelycharged Wrote: I can see space to fit another panel Big Grin

Or 2! once on each end
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#26
I was not going to point that out.... I figured the two ends of the rails shouting for another solar panel would be enough...

I did think, the other option would have been a cover with supports up from the side of the path with the panel cover going up to the apex. Enough of a slope to wash the dust off (bird residue still needs a brush, especially seagulls or a well fed crow) and then put twice the numper of panels up. Rain cover for the path...

End of the day the most important aspect is making a difference.... we all need to do it.
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#27
(07-23-2018, 12:19 AM)completelycharged Wrote: I did think, the other option would have been a cover with supports up from the side of the path with the panel cover going up to the apex. Enough of a slope to wash the dust off (bird residue still needs a brush, especially seagulls or a well fed crow) and then put twice the numper of panels up. Rain cover for the path...

Actually, I plan something like this. A pergola over the path with 12 more panels on it. The inverter is rated 4000w, so I'm presuming ill be good to load it with 1.3x panels, so 5.2kw of them. So 12 more panels at about 260w would be about right.
But this would be an upgrade to come in maybe a year of two due to time and budget constraints lol

(07-23-2018, 12:19 AM)completelycharged Wrote: End of the day the most important aspect is making a difference.... we all need to do it.
I'll drink to that!
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#28
I got the wiring for the panels sorted today. It charged up my 280 cells in about 1.5 hours. But as it neared 4.1v per cell WatchPower reported that solar generation dropped (from about 1kw to 150w) when the sun was still out. I presume this is just the inverter throttling power from solar so as to not overcharge the batteries?
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#29
Power output will be throttled back as the cells near capacity. An easy way to test if this is happening is to put a load on the system. The power generation should increase by the size of the load.
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#30
Good looking setup... keep up the work man..
I try... Sometimes i fail.... ok most times. lol

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