Hi All,
Just thought I'd follow up here. Turns out the transformer was rated at
10kva. (remember, this system has three 7.7kw inverters...) We were able to
get the utility to come out and put in a 25kVa transformer, and the voltage
rise is now way more in line with what we would expect.
Cheers,
The customer has already had the utility come out to take a look. He says
they had him turn off the solar, and then they measured 246V at the
transformer and then said it's not their problem. He was going to try to
get them back out to check the connections at the transformer and the
meter.
Also,
Wrenches, Dave
I have had this issue, first turn off everything, check static voltage,
this will drive everything else. If the static is 240 L-L look at the
utility side you might have small conductors, you might also have a
transformer size issue bottlenecking the current. Next turn loads more
Hi Dave,
Where is the utility voltage being measured?
I might suggest doing point to point voltage calculations based on the true
wire size and then verifying with measurement. It's great to use an IR
camera to look for hot spots. Do this when the problem is the worst. Is
it symmetric with
Hi DaveIt might be that the utility transformer is where the extra voltage rise is coming from?JayOn Feb 23, 2023, at 10:03 AM, Dave Tedeyan via RE-wrenches wrote:Hi All,I've got a customer who is having issues with high voltage at their house. This first became an issue after installing 23.1kw
Hi All,
I've got a customer who is having issues with high voltage at their house.
This first became an issue after installing 23.1kw of AC solar output. They
have some GREE heat pumps which have been having some failures. The heat
pump people are saying that the problem is that the voltage is
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