Howdy! I'm having solar panels and Powerwalls installed. My installer thinks I'll need two gateways, whereas I think I don't. I need your help!
Here's what I have today: One 200A meter, housed in a 320A meter base, which feeds two 150A breakers, each protecting one of two 225A load panels. My house is large but fairly efficient, so I haven't yet exceeded 55A of total load (sum of both panels). If I were to run all air conditioning units, pool equipment, and dryer at the same time (water heater is gas), I would still be below 100A of total load.
I'm having 4 Powerwalls and 20.0 kW of panels installed. My installer saw the two load panels and therefore wants to install two gateways. This will not only cost me more, but will also lead to potentially unbalanced loads vs. backups in an outage. Not to mention the annoyance of tracking production and consumption for the two gateways separately in the app.
Since I only have a 200A meter, I think it makes sense to have the following: One 200A meter, housed in a 320A meter base, which connects to one gateway with a 200A breaker, which connects on the backup loads side to two 150A breakers, each protecting one of the two 225A load panels. Each load panel would keep their existing loads as they are, plus two new 30A breakers for two Powerwalls and one new 45A breaker for half the solar panels (all such new breakers on the opposite end of the feeder).
As far as I can tell, the two load panels would comply with the 120% rule (150 + 2*30 + 45 < 1.2*225). However, the installer is unsure whether the gateway supports connecting two separate load panels in parallel, especially in a scenario where the breakers protecting the two load panels add up to 300A whereas the gateway is only rated for 200A.
Does anyone know why this would or would not work? Does anyone have a similar setup at home, or has installed something similar for one of your customers?
Here's what I have today: One 200A meter, housed in a 320A meter base, which feeds two 150A breakers, each protecting one of two 225A load panels. My house is large but fairly efficient, so I haven't yet exceeded 55A of total load (sum of both panels). If I were to run all air conditioning units, pool equipment, and dryer at the same time (water heater is gas), I would still be below 100A of total load.
I'm having 4 Powerwalls and 20.0 kW of panels installed. My installer saw the two load panels and therefore wants to install two gateways. This will not only cost me more, but will also lead to potentially unbalanced loads vs. backups in an outage. Not to mention the annoyance of tracking production and consumption for the two gateways separately in the app.
Since I only have a 200A meter, I think it makes sense to have the following: One 200A meter, housed in a 320A meter base, which connects to one gateway with a 200A breaker, which connects on the backup loads side to two 150A breakers, each protecting one of the two 225A load panels. Each load panel would keep their existing loads as they are, plus two new 30A breakers for two Powerwalls and one new 45A breaker for half the solar panels (all such new breakers on the opposite end of the feeder).
As far as I can tell, the two load panels would comply with the 120% rule (150 + 2*30 + 45 < 1.2*225). However, the installer is unsure whether the gateway supports connecting two separate load panels in parallel, especially in a scenario where the breakers protecting the two load panels add up to 300A whereas the gateway is only rated for 200A.
Does anyone know why this would or would not work? Does anyone have a similar setup at home, or has installed something similar for one of your customers?