Havnt tried it with one panel as I thought trying to drive a 36volt pump with 23 volts might cause damage.Quote:
Originally Posted by Vern
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Havnt tried it with one panel as I thought trying to drive a 36volt pump with 23 volts might cause damage.Quote:
Originally Posted by Vern
Tried that already. Went from no lights at all to the voltage overload as I removed the cover. I was thinking that might only change the watts not the volts.Quote:
Originally Posted by Graeme
That sounds a better idea than my long wire or resistance for voltage drop.Quote:
Originally Posted by bee utey
I will give that a go.
Whoa.........................................littl e steps is good. :)
Solar panels come (basically) in two sizes 12 volt (nominal) and 24 volt (nominal). A 12 volt solar panel will have a Voc (open circuit voltage no load) of approx. 22 volts and a working voltage (connected to a regulator with a load) of around 18 volts to give a regulated output (from the solar regulator/controller) of 13.5 volts (usually connected to a 12 volt (nominal) battery. For a 24 volt system double these numbers.
If you have a 36 volt (nominal) system you will need 3 X 12 volt panels connected in series. This will have a Voc of approx. 66 volts and a working solar panel voltage of approx. 54 volts into the controller when the reg/controller is connected to a load. The reg output voltage will be around 40 volts.
What does it say on the back of the solar panels ? (Manufacturer, model number Voc etc), same for the solar reg/controller, and for the pump. These solar bore pump setups don't usually require a battery when used with the correct controller so this should not be an issue if all the components are compatible :).
Give us a bit more info and all may become clearer. :angel:
Deano :)
The voltage wont be maintained as load is increased - consider what happens if you short circuit the panel o/p with heavy gauge wire when the voltage drops to 0. However the voltage must be rising too quickly past the controller's limit before the controller gets to connect the load, which might also occur as the sun rises if the controller is that sensitive.
Here is a pic of the back of the panel.Quote:
Originally Posted by DeanoH
The pump is down the hole and only had a sticker stating 36volts.
Same with the controller.
Is there a battery terminal on the controller?
If so, try connecting a charged battery(s). (might need 24v)
The controller on my camper will not pass any solar power through if there's no battery connected, or if it's flat.
Could also depend on dip switch settings if:
1. you have the panels wired into the battery terminals, with no battery connected, OR
2. panels wired into the PV terminals, with batteries connected to the battery terminals.
And, just in case you don't have the manual............ http://sunergy.net.au/wp-content/the...ion_Manual.pdf
Thanks . Thats the same manual as I have. Does not say much does it.
No battery terminals on the control box
No B+ / B- terminals?Quote:
Originally Posted by 123rover50
According to the manual, all the controllers other than the 150v / 220v / 300v should have them.
-EDIT-
Looking at the 36v controller, it has battery terminals, but not the PV terminals.
PV panels get wired to the battery terminals, so no battery connection required............ hmmm.
You also need 2x 22v 130W panels in series.
Starting to look like your panels are a bit wanting. ???
Also, is your pump outlet 1" or larger?
If it's larger, then you've got the wrong pump, which is still 36v, but will need 500w to crank it.
Well its got me buggered.
Hooked a full 15 amp extension cord between the panels and box.
Turned it on and as before I can hear the pump start then stop and the yellow light comes on.
This time I held the voltmeter on it. Voltage dropped from 50 creeping down to 10 when the motor stops and yellow light comes on.
There are 3 wires going to the pump and I dont know which are the power wires and which is the low level cutout wire.
There is a U which is black V which is brown and W which is blue.
If there is low voltage the yellow light is supposed to flash. High voltage it is steady on.
Might have to wait and see what respone the young fellow gets from China.