Good day everyone, first time caller, long time listener.
I have been scouring the forum and it is quite obvious there are many extremely knowledgeable individuals posting here. With that said, I have some questions for the members here that for some strange reason (sarcasm) I can't get an answer from the people actually "designing" my system.
A few months ago (like six now) I placed an order for a 2 powerwall 8kW solar panel installation. Things progressed along very quickly to permitting and interconnect agreement with my local utility (PECO) here in PA.
PECO denied my system design an proposed some changes because the system as designed would violate Pennsylvania's Electrical Code for "Voltage Rise" I am pasting the particulars below.
We opted for the last/best option. However, the question I have is. Shouldn't Tesla be able to design the system with different inverters or some other appliances/software config to prevent the voltage rise? it seems like it would be rather simple in my opinion, but I am not an electrical engineer.
I have tried contacting my *third* Project Advisor VIA phone and email to little success, and of course they changed the original "whole house" backup with 2 powerwalls to a "most of house" backup, unless we added a third powerwall, so that redesign is taking forever.
Hopefully, we will be able to resolve at least the redesign quickly, as I am more concerned with power stability and reliability than I am with offsetting electric costs with solar. But in the meantime, maybe I can understand more about the Voltage Rise, and eliminating it while having more panels available.
Thanks!
I have been scouring the forum and it is quite obvious there are many extremely knowledgeable individuals posting here. With that said, I have some questions for the members here that for some strange reason (sarcasm) I can't get an answer from the people actually "designing" my system.
A few months ago (like six now) I placed an order for a 2 powerwall 8kW solar panel installation. Things progressed along very quickly to permitting and interconnect agreement with my local utility (PECO) here in PA.
PECO denied my system design an proposed some changes because the system as designed would violate Pennsylvania's Electrical Code for "Voltage Rise" I am pasting the particulars below.
Details of Rejection:
Proposed generation creates voltage rise exceeding PA Code maximum allowable limit. The application is conditionally approved pending solution acceptance and will be approved as revised if one of the following possible solutions is implemented:
1) Lowering proposed generation to 4.70 kW AC Output.
2) Lowering proposed generation to 5.50 kW AC Output AND upgrading service conductor to 1/0 AL triplex.
3) Lowering proposed generation to 5.70 kW AC Output AND all inverters within system operate at a constant 95% lagging/absorbing power factor (PF). Inverter also to maintain Q or Reactive power priority setting (as applicable). This option requires completion of an Inverter Addendum which supplements the PECO Interconnection Agreement.
4) Lowering proposed generation to 6.80 kW AC Output AND Upgrading service conductor to 1/0 AL triplex AND all inverters within system operate at a constant 95% lagging/absorbing power factor (PF).
We opted for the last/best option. However, the question I have is. Shouldn't Tesla be able to design the system with different inverters or some other appliances/software config to prevent the voltage rise? it seems like it would be rather simple in my opinion, but I am not an electrical engineer.
I have tried contacting my *third* Project Advisor VIA phone and email to little success, and of course they changed the original "whole house" backup with 2 powerwalls to a "most of house" backup, unless we added a third powerwall, so that redesign is taking forever.
Hopefully, we will be able to resolve at least the redesign quickly, as I am more concerned with power stability and reliability than I am with offsetting electric costs with solar. But in the meantime, maybe I can understand more about the Voltage Rise, and eliminating it while having more panels available.
Thanks!