I am installing a residential battery/solar inverter (15KW) and am confused by the installation instructions. They do not show an emergency panel. is a Solar/Arc inverter with batteries considered an optional standby and therefor require an emergency panel or load sheading per 702?
Is a Solar/Arc inverter an optional standby
- Thread starter wyboy
- Start date
Seven-Delta-FortyOne
Goin’ Down In Flames........
- Location
- Humboldt
- Occupation
- EC and GC
I’m a little confused about what you are installing.
Is it a
- Emergency system (Art 700)
- Legally Required Standby System (Art 701)
- Optional Standby System (Art 702)
Is it a
- Emergency system (Art 700)
- Legally Required Standby System (Art 701)
- Optional Standby System (Art 702)
If anything, it is Optional Standby System (Art 702). (It is residential so 702 would applies)
However, the Solar/Arc inverter with batteries installation instructions show them feeding 200-amp main service panels with no sheading of loads. As it is a solar and battery it is also an interconnected Electric Power source (705). 705.4 allows interconnected Electric Power source to operate in island mode. No load sheading is noted. However, as it is acting as a backup power source, would 702. apply?
However, the Solar/Arc inverter with batteries installation instructions show them feeding 200-amp main service panels with no sheading of loads. As it is a solar and battery it is also an interconnected Electric Power source (705). 705.4 allows interconnected Electric Power source to operate in island mode. No load sheading is noted. However, as it is acting as a backup power source, would 702. apply?
jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
Sol-Ark?
Maybe show us a line diagram and check that you're using correct terminology.
If there is no backed-up critical loads panel maybe they are trying to back up the whole home? A main service panel cannot really be backed up, since it connects directly to the service. A system that operates in island mode can back up a whole home or only a partial home. Sol-Ark could be used with or without backing up anything.
We try not to use 'emergency' for residential backup systems precisely to avoid confusion regarding article 700.
Also depending on you code cycle it's been possible to argue that 705 systems operating in stand-alone mode are covered by 710, not 702. Fortunately I've not had AHJs scrutinize my systems for 702 compliance but I've heard of AHJs doing that.
Maybe show us a line diagram and check that you're using correct terminology.
If there is no backed-up critical loads panel maybe they are trying to back up the whole home? A main service panel cannot really be backed up, since it connects directly to the service. A system that operates in island mode can back up a whole home or only a partial home. Sol-Ark could be used with or without backing up anything.
We try not to use 'emergency' for residential backup systems precisely to avoid confusion regarding article 700.
Also depending on you code cycle it's been possible to argue that 705 systems operating in stand-alone mode are covered by 710, not 702. Fortunately I've not had AHJs scrutinize my systems for 702 compliance but I've heard of AHJs doing that.