How to determine output wires


Old 01-19-14, 03:26 PM
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Red face How to determine output wires

We have a AC to DC power inverter for our solar hot water heater project and have been upgrading the system. Unfortunately we took the inverter out and now don't know what the leads do.

On what i think is the AC end, there are only two wires (leads). One is blue and the other yellow. i think that it doesn't matter which lead i connect to the AC supply. Is this correct?

On the other end, there are three leads, one blue, one yellow and one green and yellow. We have a multimeter.

What would be the proper proceedure to determine what each of the output leads are (+, -, and/or ?ground?)?

Hope someone can help. Have a great afternoon!
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Old 01-19-14, 04:27 PM
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Some more info would be helpful. A picture, manufacture and rating. I know if you do not connect it correctly you can damage the unit. Have you tried checking the mfg site for instructions?
Old 01-19-14, 05:59 PM
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connect to the AC supply
That would be a power supply or converter.... not an inverter.
An inverter gets connected to batteries (DC) and generates AC.

Without more info... like make and model..... my guess is the AC side has the three wires.
The DC side usually doesn't require a ground.
Old 01-19-14, 07:53 PM
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Thanks, guys. You know you're right. i finally figured out what to call the thing and it makes it a lot easier to Google it and to finally find something that looks like the original.

i even had the AC and DC sides backward. Arg.

Since the item has been in 50C weather, it no longer has any paper or plastic identifying marks on it. We've uploaded one that looks very similar to the one we have - the colors are not the same on all the wires, but like you mentioned, it looks like the 3 wire side is the AC.

Maybe this will provide enough info. If not, let me know.

Have a great evening!
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