# Build simple clamp-on amp meter for 220 VAC

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#### jack0987

##### Member
Build simple clamp-on amp meter for 220 VAC

Want to see output of my solar panels.
Right now I have four at 250 Watts each. May want to add 12 more panels in future.
What might be the easiest way to do this?

I could perhaps use my multimeter or perhaps get a needle type amp meter.

##### Well-Known Member
For a clamp on meter the voltage is irrelevant within reason, current is the main issue, there are non invasive IC's etc that can be used to integrate it such as ACS712 for a couple of  on ebay.
Max.

#### tcmtech

##### Banned
Yes. That a hall effect sensor based amp clamp. Not a induction (AKA current transformer) based.

##### Well-Known Member
You don't see too many of the old moving coil AC clamp on meter much any more!
Max.

#### schmitt trigger

##### Well-Known Member
Indeed! Hall cells have become cheaper and largely superseded transformer-type current meters.

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