New off grid home

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Re: New off grid home

Postby offgridQLD » Tue Oct 15, 2013 11:00 pm

15.7A yesterday and 16.3A today . I have End amps set at 16.5A and I always switch to float due to end amps being triggered and I never go the 3hrs of the timer . Most days when I am not there we usually see float before 10AM and max out at between 5 and 7kwh for the day . So 23kwh and then again 22kwh today is very strange. Voltage is siting at around 50.5v - 50.6v at the moment 11pm so there cant be a big of a load on if there is. The water pump is my main concern as it has 50,000lt of water to play with :o though with the 500w the pump consumes I think the voltage would on be lower by this time of night if it was running 24/7. That said a voltage of around 50.8v at this time is more typical though under the load of the water pump i would expect more like 50v. I hope so anyhow.....thinks to myself I need a timer on that water pump in the future.

I think I am just going to drive up there in the morning and see whats going on. My guess is that the bank has just finally started to play up and I don't have a load on my system.

edit: 50.4 volts now hmm, see how it looks just before sun up tomorrow.

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Re: New off grid home

Postby offgridQLD » Wed Oct 16, 2013 8:00 am

Thanks for the info on contractors & breakers. That's roughly what I was thinking. I think its often overlooked and people cut corners when they see the price of a true DC rated breaker.

Regarding my potentially sick battery or odd system load. Unfortunately this morning the voltage has hit 49.6v at 5am so somethings going on . I think we are going to be in for another 20kwh day :shock: . I'm actually quite keen to see whats going on so I will drive up this morning. If it is the battery boy that came on quick I was expecting more of a slow death. I guess its good to have remote monitoring or issues would just go on without notice. Shame the one time I needed the most data I can get is the one time a few areas of my monitoring are offline :lol:

I will take some readings and report back.

Just hope I haven't emptied 50,000lt of water into my kitchen or something like that :lol: :o :shock:

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Re: New off grid home

Postby offgridQLD » Wed Oct 16, 2013 3:48 pm

I have some answers to the crazy high kwh's being pumped into the battery over the past two days.

I went up there this morning to find the front garden tap running :shock: So it's been doing it for 2 1/2 days though I suspect a little less. Like I said before I am pedantic about turning things off we have made a habit of checking taps before we go . Also we drive past that tap on the way out. I sure wouldn't walk away from a tap that's running. Makes me think the fresh water was to tempting for the workers building a new house on the block next door and perhaps one was lazy turning it off. Though I cant say for sure as I didn't have a camera on the tap though I do now ;)

Anyhow it wasn't on full flow but its knocked the top 1/4 of two 25,000lt tanks that were completely full before hand. The lawn out the back is well watered .The water ran along the concrete and out the back onto the lawn .

The system is back on float and performing as expected now. I have installed a timer on the water pressure pumps gpo and programed it to only supply power to it on the weekends. It's a good thing that I have remote monitoring or I would have arrived Friday night to find two empty tanks and very very green grass :lol: I would have found the issue earlier most likely Sunday evening if I had the homes whr meter facing the security camera.

So the lead lives to fight another day :roll:

Kurt
Last edited by offgridQLD on Wed Oct 16, 2013 4:25 pm, edited 4 times in total.
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Re: New off grid home

Postby jimbo » Wed Oct 16, 2013 3:51 pm

Good to hear!!
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Re: New off grid home

Postby davidg » Wed Oct 16, 2013 4:15 pm

offgridQLD wrote:I have installed a timer for on the pressure pumps gpo and programed it to only supply power to it on the weekends. Its a good thing that I have remote monitoring .................... I would have found the issue earlier most likely Sunday evening if I had the homes whr meeter facing the security camera.

Maybe something like this might be worth it to you, uses about 2watts.

My own personal Smart Meter is now installed it also has a couple of "relay" switches in it as well, with them could remotely turn on and off a couple of things via it and I also have a water meter with counter is also now connected the same meter sends me an email with the the stats each day although it could do it more frequently with those relays I could remotely turn off the power to say most of a house and or all pumps for instance, not using them yet just deciding what or how I might use them. they are pretty manual but fully remotely controlled. Something like that might have been handy for you maybe? also records of course lots of other stuff.

I should also say that each phase can actually be a separately monitored circuit, this particular meter does not need to be on 3 phase at all. it's the way I'm using but it could be multiple single phase circuits just as easily that's pretty cool, I think anyway.

Here's the list it sends me each day.

Meter Date: 2013-10-15 23:59:12
Computer Date: 2013-10-15 23:59:52
Model: EKM-Omnimeter Pulse v.4
Firmware: 15
Address:
Total Kilowatt Hour:
Forward Kilowatt Hour:
Reverse Kilowatt Hour:
Net Kilowatt Hour:
Total Kilowatt Hour T1 (TOU1):
Total Kilowatt Hour T2 (TOU2):
Total Kilowatt Hour T3 (TOU3):
Total Kilowatt Hour T4 (TOU4):
Reverse Kilowatt Hour T1:
Reverse Kilowatt Hour T2:
Reverse Kilowatt Hour T3:
Reverse Kilowatt Hour T4:
Voltage1:
Voltage2:
Voltage3:
Current1 (Amps1):
Current2 (Amps2):
Current3 (Amps3):
Power1 (Watts1):
Power2 (Watts2):
Power3 (Watts3):
Total Power (Watts):
Cosθ 1 (Power Factor1):
Cosθ 2 (Power Factor2):
Cosθ 3 (Power Factor3):
Max Demand:
Max Demand Period: 15 Minutes
CT Ratio: 200
Pulse 1 Count: 0
Pulse 1 Ratio: 1000
Pulse 2 Count: 0
Pulse 2 Ratio: 1000
Pulse 3 Count: 0
Pulse 3 Ratio: 1000
Reactive Kilowatt Hour (kVARh):
Total Kilowatt Hour L1:
Total Kilowatt Hour L2:
Total Kilowatt Hour L3:
Reverse Kilowatt Hour L1:
Reverse Kilowatt Hour L2:
Reverse Kilowatt Hour L3:
Resettable Total Kilowatt Hour:
Resettable Reverse Kilowatt Hour:
Reactive Power L1 (VARs):
Reactive Power L2:
Reactive Power L3:
Total Reactive Power:
Frequency (Hz): 50.05
Pulse Input State 1: Open
Pulse Input 2: Open
Pulse Input 3: Open
Current Direction L1: Forward
Current Direction L2: Forward
Current Direction L3: Forward
Output 1: Off
Output 2: Off
Decimal Places: 2
Auto Reset Max Demand: Off
Settable Pulse Output Ratio (Pulses Per kWh): 800
Checksum: 6040
Checksum Calculated: 6040

========

There's a bunch of other data you also receive.
It will send it at any time that suits

Polling period I'm using ATM is 10seconds, faster appears to have some stability issues, at least on my computer right now. You can have the RS485 direct over the internet, then link to via the internet using a virtual serial port is another option, no computer required at site that way :D.
Last edited by davidg on Wed Oct 16, 2013 4:26 pm, edited 2 times in total.
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Re: New off grid home

Postby Gordon-Loomberah » Wed Oct 16, 2013 4:16 pm

Glad it was easily sorted Kurt- much better to find a running tap (at least when you are in a high rainfall area!) than a large dead battery.
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Re: New off grid home

Postby offgridQLD » Wed Oct 16, 2013 4:37 pm

David, that device sounds great do you have a link to it, Or is it a device you created yourself?

Gordon,
Sure was better news than I was expecting. I wasn't prepared for commissioning a new lithium bank just yet I would prefer to do that when we are there full time.

The system was keeping up with the load during the day though running that pump all night the voltages were lower than I was normally recording for early AM readings. Sure would have perfected pumping all that kwh into the car rather than watering the lawn :lol:.

Also makes me think I need to install a isolating valve on the bridge pipe (installed at ground level) between the two tanks . That way I am only working from one tank at a time. God knows why they didn't put a valve in that bridge pipe in the first place as it makes it a harder job to do now with water in them.

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Re: New off grid home

Postby davidg » Wed Oct 16, 2013 5:33 pm

offgridQLD wrote:David, that device sounds great do you have a link to it, Or is it a device you created yourself?

No, just bought it and the software

http://www.ekmmetering.com in the US accuracy is Class 0.5 more than accurate enough.

This is what I bought

1 x Omnimeter v.4 (I wanted the relays and the external counters as well.)
1 x EKM dash license. (Software)
3 x Split CT's 200A versions
1 x Water Meter which includes the pulse contacts on it for counting water use.
1 x Iserial unit (RS485 to Network) this only needs 2 wires and maybe a gnd can be up to 1200 metres apart, if thats not convenient then they do have some RF stuff good up to 250metres approx depends on obstacles.

I have the RS485 line running 80metres with no shield and using only 2 wires in Cat5e cable not even shielded, no terminators even (120ohm resistors) worked better without them.

The amount of data transmitted is actually quite small. Database gets biggish though.

You need a computer ;)

Each CT can monitor an separate independent circuit, without issues, then your security cam can look at anything else you like at the sametime. :lol:
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Re: New off grid home

Postby offgridQLD » Wed Oct 16, 2013 5:58 pm

Thanks I will have a read over it :)

Kurt.
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Re: New off grid home

Postby Cherokee Solar » Thu Oct 17, 2013 7:18 am

offgridQLD wrote:Anyhow it wasn't on full flow but its knocked the top 1/4 of two 25,000lt tanks that were completely full before hand. The lawn out the back is well watered .The water ran along the concrete and out the back onto the lawn .


Glad to hear that it was just a running tap! Still, not good when you are on tank water. I keep reading that QLD is hot and dry at the moment. Has the rain turned up yet?

PS: 25.0v in the morning is not unusual (approx 90% state of charge), but it requires some pretty hefty loads from the previous day (about 120A). Glad to hear that your batteries are back to normal.

Chris
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