Enphase Envoy-S metered - waterproof CT's for outdoor install

[Blacky1002]

What are the specs of the giant external CTs you used? they are not the standard ones from enphase, so how do you know they have the same current ratio?

reverse engineered.....

[SunEagle]

reverse engineered.....

I hope you just read the rating on the side of the CT to know what their ratio.

It is the secondary value that determines if they are compatible with the metering device. Common inputs to meter are 1 amp, 5 amp or 333mv.

The primary value will just determine if you are in the bottom, middle or upper part of the measuring scale.

[Blacky1002]

I hope you just read the rating on the side of the CT to know what their ratio.

It is the secondary value that determines if they are compatible with the metering device. Common inputs to meter are 1 amp, 5 amp or 333mv.

The primary value will just determine if you are in the bottom, middle or upper part of the measuring scale.

Unfortunatelly, that's not even close and the actual value does not fall anywhere near the typical brackets

[SunEagle]

Unfortunatelly, that's not even close and the actual value does not fall anywhere near the typical brackets

So what type of input value (amps or mv) does your meter require?

I have been purchasing and use CT's for a long time and unless the requirement is very unique most meters accept the 3 standard input values I mentioned.

[SunEagle]

This seems like an advertisement...

CTs should NOT make any noise.
Even if you couldn't get regular CTs in you should have had no problem getting a Rogowski coil CT in on your MSP.

Butch

Are you familiar with the CT-200 that Enphase used for there metering. The only information I can find shows what I think is a 200A to 500mv ratio but I am not sure if that 0.5V is a maximum rating or the actual input requirement to the Enphase meter.

[ButchDeal]

Butch

Are you familiar with the CT-200 that Enphase used for there metering. The only information I can find shows what I think is a 200A to 500mv ratio but I am not sure if that 0.5V is a maximum rating or the actual input requirement to the Enphase meter.

I saw the same thing. We do very few enphase installs (only small ones) and have done none with the consumption meter.
We do a lot of solaredge installs and many with consumption meter. We have often had to use Rogowski coils for these installs as well as with FLEX energy hubs.

[Blacky1002]

Butch

Are you familiar with the CT-200 that Enphase used for there metering. The only information I can find shows what I think is a 200A to 500mv ratio but I am not sure if that 0.5V is a maximum rating or the actual input requirement to the Enphase meter.

Enphase engineered an odd ball. Not sure if that is to insure people are buying their CT equipment?

200A@0.4V

[SunEagle]

Enphase engineered an odd ball. Not sure if that is to insure people are buying their CT equipment?

200A@0.4V

You might be right on them wanting you to only use their equipment. Although Flex Core does make some nice and affordable CT's with many different ratios.

The Enphase meter may work using a 333mv or .333v input. Sometimes a meter manufacturer provides the max input values but allows you to go a little lower. The problem would be the accuracy could suffer.

[ButchDeal]

You might be right on them wanting you to only use their equipment. Although Flex Core does make some nice and affordable CT's with many different ratios.

The Enphase meter may work using a 333mv or .333v input. Sometimes a meter manufacturer provides the max input values but allows you to go a little lower. The problem would be the accuracy could suffer.

there are a few listed on hqmeter with 0.4V output. like the JC16F, JC24F, etc.

http://www.hqmeter.com/split-core-ct.html

[Blacky1002]

there are a few listed on hqmeter with 0.4V output. like the JC16F, JC24F, etc.

http://www.hqmeter.com/split-core-ct.html

yup, looked at them early on. unfortunately neither one had the right turn ratio or was weatherproof,
which is why I ended up with the custom unit build to my specs