Wind Gen/alt connections

Getting into the nuts and bolts of wind and solar power components, installation and performance issues, ask technical questions, answers and tips

Re: Wind Gen/alt connections

Postby harrydiculous » Wed Oct 23, 2019 8:02 am

Yes Jaahn. It's been going through my head all night.

What I'm not understanding is the relationship between the Panels & the Batteries.

The Inverter is demanding power to feed its chickens. The cable to the battery terminal is much thicker than the cable from the Regulator & the panels.

So, hydraulically speaking, the inverter will receive more power from the battery rather than the panels because it has a bigger "pipe."

I should, then, be able to work out what's coming from the Batteries & The PV's by deducting the PV input from the total used by the inverter.

I can then formulate that into an excel sheet to make it easier to troubleshoot/develop later.



But first, I'll check again all the cabling from the panels. I haven't done that for some time.

I just saw Jules post come in. I didn't run it much at all. Maybe 2 mins. The Voltage dropped to 25 so I cut it short.
3kW on grid. Solar River PV Grid Tied inverter 3000TL. Rene Solar Panels 12 x 250. Solar Hot Water. 960 watt Solar off grid with 3500 watt inverter. 4 x 100 amp/h batteries.
harrydiculous
Solar Evangelist
Solar Evangelist
 
Posts: 74
Joined: Mon Feb 24, 2014 7:54 pm

Re: Wind Gen/alt connections

Postby Gordon-Loomberah » Wed Oct 23, 2019 12:27 pm

You really should be measuring the voltage at various points in the system with a single good quality multimeter, rather than relying on the voltage readings of inverter, MPPT CC etc, (which almost certainly do not agree) making any proper analysis impossible.
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
User avatar
Gordon-Loomberah
Community Moderator
 
Posts: 5762
Joined: Thu Sep 24, 2009 9:41 pm
Location: Loomberah NSW Australia

Re: Wind Gen/alt connections

Postby jaahn » Thu Oct 24, 2019 12:09 pm

Hi Harry :D
If you wish to measure the power of your 240V household appliances you can get one of these; https://www.ebay.com.au/itm/240V-Power- ... ctupt=true
I have one ! But indeed all the libraries here have a home power consumption check' kit to borrow which has one. So check with your library too. You can use them on the mains power, as well as plugged into a sinewave inverter. Be interesting to see if you get the same reading ?? :roll:
Cheers Jaahn
jaahn
Solar Crusader
Solar Crusader
 
Posts: 220
Joined: Sun Apr 25, 2010 8:42 am

Re: Wind Gen/alt connections

Postby harrydiculous » Sun Feb 16, 2020 5:03 pm

Well, fires are over, and we're feeling pretty fortunate here on the South Coast of NSW and the place where we are. No losses, several warnings including a "too late to leave" notice but we're intact.

So, I can now pick up where I left off.

I'd decided that my soldering of the battery cabling was pretty second class. It looked a mess so it probably was.

I decided to fabricate some bus bars; 25.4 mm x 6.35 mm copper & replace the cables with it.

https://flic.kr/p/2itLiiL

I was also given an AGM 200 AMP/Hr battery from a backup system that's replaced every two years regardless.
3kW on grid. Solar River PV Grid Tied inverter 3000TL. Rene Solar Panels 12 x 250. Solar Hot Water. 960 watt Solar off grid with 3500 watt inverter. 4 x 100 amp/h batteries.
harrydiculous
Solar Evangelist
Solar Evangelist
 
Posts: 74
Joined: Mon Feb 24, 2014 7:54 pm

Re: Wind Gen/alt connections

Postby Bthree » Sun Feb 16, 2020 9:54 pm

Very clever but you will get better cell balancing if the power fed plus and minus come from the center battery and you need grommets or plastic tube to relieve the cable going through the metal wall

http://www.smartgauge.co.uk/batt_con.html
Network = Powercor .. Retailer = Origin .. Installed Christmas 2008
Latronics PV-1200 feed by 8xTrina TSM DC-01 .. 170watt = 1360watts DC in .. 1096watts AC out .. 5+years later 990watts ac out
Bthree
Solar Crusader
Solar Crusader
 
Posts: 432
Joined: Thu Sep 24, 2009 10:14 pm
Location: NorthWest Victoria

Re: Wind Gen/alt connections

Postby harrydiculous » Mon Feb 17, 2020 10:00 am

Thanks Bthree. That is excellent information, I'll work on that. Minor problem; I'll have to drill more holes in the back of the metal shed, rather fraught without moving the batteries. I was going to extend the bus bars through to the Inverter.

As for insulating against the metal wall, davidG mentioned this earlier. I'd better do something about that, then. :oops:

And Gordon, I have a Cat III Multi-tester. I guess that this will be adequate. It always comes up with a reading between the other two sources.
3kW on grid. Solar River PV Grid Tied inverter 3000TL. Rene Solar Panels 12 x 250. Solar Hot Water. 960 watt Solar off grid with 3500 watt inverter. 4 x 100 amp/h batteries.
harrydiculous
Solar Evangelist
Solar Evangelist
 
Posts: 74
Joined: Mon Feb 24, 2014 7:54 pm

Re: Wind Gen/alt connections

Postby harrydiculous » Wed Feb 26, 2020 10:01 am

OK, Included some PVC Insulation between wires on the shed on both + & -.

And I've earthed the 240 Volt side & installed earth leakage devices. They seem to work without a practical test.

There is still cable (Approx 12.7mm Dia.) between the batteries & the inverter. (Method no.2 on Bthree[b]'s[/b] Chart.

https://flic.kr/p/2ixESey

https://flic.kr/p/2ixJEoF

Now, I do feel a current flow if I touch any battery terminal. + or -. Is this OK?
3kW on grid. Solar River PV Grid Tied inverter 3000TL. Rene Solar Panels 12 x 250. Solar Hot Water. 960 watt Solar off grid with 3500 watt inverter. 4 x 100 amp/h batteries.
harrydiculous
Solar Evangelist
Solar Evangelist
 
Posts: 74
Joined: Mon Feb 24, 2014 7:54 pm

Re: Wind Gen/alt connections

Postby jaahn » Wed Feb 26, 2020 10:25 am

"Now, I do feel a current flow if I touch any battery terminal. + or -. Is this OK?"
Hi :)
Short answer NO ! :roll:
I am not sure what you are feeling but there should not be any 'leakage' of any type. You could put your multimeter on it, to earth, and see what it says. Perhaps your earth is bad and feeding leakage back from the inverter ? Or the inverter is leaky.
Remember electricity kills. :evil:
Jaahn
jaahn
Solar Crusader
Solar Crusader
 
Posts: 220
Joined: Sun Apr 25, 2010 8:42 am

Re: Wind Gen/alt connections

Postby australsolarier » Wed Feb 26, 2020 11:40 am

i am not sure i like your handiwork.
australsolarier
Solar Crusader
Solar Crusader
 
Posts: 515
Joined: Sun Mar 28, 2010 9:27 am

Re: Wind Gen/alt connections

Postby harrydiculous » Wed Feb 26, 2020 4:59 pm

Not repeating today jaahn, despite wetting finger to do what I could to promote a flow. (On the 12 volt side, of course.) I did try & measure before and it was about 1.9 volts. Today it was around 100 mV. But it was showing that without the contacts being engaged. Maybe it was wet weather (damp floor) on other occasions. Easy enough to reproduce but next time with the multi-tester & not my finger, seeing as how the Inverter might be a cause. Checked earth contacts as a matter of course. I'll do some connects/disconnects/measurements over the next week.

The previous cabling was about 9.4mm diameter. Messy soldering. And it certainly seems more stable now.

I needed to raise the bars on stanchions to clear the water ports for topping up.

Everything on the 240 Volt side is legal. Nothing bodgy there. "When in doubt :? ; don't."
3kW on grid. Solar River PV Grid Tied inverter 3000TL. Rene Solar Panels 12 x 250. Solar Hot Water. 960 watt Solar off grid with 3500 watt inverter. 4 x 100 amp/h batteries.
harrydiculous
Solar Evangelist
Solar Evangelist
 
Posts: 74
Joined: Mon Feb 24, 2014 7:54 pm

PreviousNext

Return to Components, Installation And Performance

Who is online

Users browsing this forum: No registered users and 5 guests

new solar power specials
cron