Does anybody have any experience using 24 volt pma's and running the charge through a classic 150?
Also can you use solar array and wind turbine at the same time through the same regulator?
Quote from: russ_drinkwater on July 16, 2016, 03:16:40 AM
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Also can you use solar array and wind turbine at the same time through the same regulator?
Not likely, the PV will act like a voltage limit for the turbine, Voc limiting the turbine voltage, not sure how it would work after dark, if the PV would suck all the power from the turbine. (dark panels have a low Voc)
You could just connect the turbine directly to the battery bank at DC distribution box.
The neg should go to high side of the shunt then the WBjr will see the turbine charging current.
This will work well with a smallish under 1kw turbine but you should still have breakers in DC pos and perhaps a run/stop switch that can shut down the turbine
Dgd
I have used turbine(s) with Classic 150's. You probably should use a Clipper or other device to limit the turbine output to stay within the Classic's input limits. Mostly voltage limits.
As DGD pointed out you cannot use the Classic with both sources into its inputs, or, in other words it would not be a sensible or workable configuration.
I have also used Classics feeding solar in and a turbine directly connected to the same battery bank.
You can have issues overcharging if your turbine happens to start pushing lots of power in while the batteries are full, however. There may be ways to use the Aux outputs to control a turbine stop relay based on battery voltage.
Tom
Thanks for the replies.
The pmas are rated at 80 amps max output so from my experience with the 2 grid tie feedin ones we have have here it is very unlikely
they would ever reach anything like that output.
The cheapest way for me to hook one directly to the 24 volt heating elements on my son's hot water system.
No regulator required.
Will see how that goes when the time is right.
Will have to save my pennies for another reg for mine.
Quote from: russ_drinkwater on July 17, 2016, 04:00:01 PM
Thanks for the replies.
The cheapest way for me to hook one directly to the 24 volt heating elements on my son's hot water system.
No regulator required.
Will see how that goes when the time is right.
Will have to save my pennies for another reg for mine.
Russ;
Just be aware that some turbines may not start in sub gale force winds with a load on them.
Just saying..
Tom
Hello Tom,
I am not sure myself.
I have 2 x 12 volt pma's of the same config connected to a grid feed inverter and where they are receiving intermittent wind a fair
bit of the year. Have spent a lot of cash trying different blades and lengths from windy nation in america to get them spinning
at high enough rpm in lower winds.
That being said they have no regulator in the system as the voltage varies from 10.5 to 30 plus volts (that is the inverter range)
I will have to try and test the pma's to see if they fire up under load as in the heating elements.
Got another 150 reg and so will test one of the pma's to see what output they have.
Three foot alloy blades so plenty torque and lesser rpm's.
I can change the hub over to some higher speed blades if needed.
Still no tower so it will be a while. :(
OK crunch time! I will be setting up a tower and mounting system for one pma this week all going well.
I have have two blade and hub configs, one with the smaller low torque high speed blades and the other one with the larger high torque slower rpm blades. I think I will go with the slower, larger blades first to see what output is generated through the classic 150.
Power companies pay me for power Standalone.
explain
eastpoint
Um, we export 40kws a day to the grid and we get paid 44 cents per kw!
Does not sound like much but over the year it adds up to a new 24 volt set of trojans every year! (4 x L16 carbons) ::) ;D
Ok after reading what a few people have posted here in regard to pma's I got off my butt and put son's up the other day.
No reg and just dumped it straight to the batteries.
It has hardly stopped since installation and keeps trojan bank topped up overnight a treat.
Also I have upgraded their solar array and removed the 18 volt voc panels and installed the hyundai 31 plus volt panels which has
increased the system (array output) voltage to 52 volts and works a lot better, even on cloudy days the array puts out 20 amps and nearly
50 amps in full sun.
Yesterday the array made 7.5 kw, plus unknown from pma.
Their wbj has died as well so he has to rely on the hydrometer for soc checking.