I was searching for a 2W/120 panel and found this post from more than 10 years ago - https://forums.mikeholt.com/threads/120v-single-phase-panelboard.108029/
The AHJ follows 2023 NEC and this is a residential install.
The installation has a regular 200A service and a 240/120 30A manual transfer for generator. The resident wants to remove the transfer switch and install a multi-input solar device (utility, generator, PV, battery). Due to limitations with split phase output capacities, he wants to use a 240 output unit with a step down transformer for 120 loads. After briefly considering it, I agree that the use of a step down presents advantages in the availability/selection of the solar units. Expanding beyond this particular question, I see the same advantage if he simply wanted to more efficiently use his generator (no solar) by not having to attempt to balance loads across legs - I've done this myself.
Thus I started searching for a single column panel. Finding that a suitable product from Siemens was discontinued (a generator panel) several years ago, the only other products I've found are industrial focused units.
I spoke with the local inspector regarding using a regular 3W panel and blanking one side as mentioned or jumping L1 to L2 and profusely labeling that the panel was for 120 loads only and he rejected both.
It seems that without a 2 wire panel, this may be a goose chase. Has anyone run into this?
The AHJ follows 2023 NEC and this is a residential install.
The installation has a regular 200A service and a 240/120 30A manual transfer for generator. The resident wants to remove the transfer switch and install a multi-input solar device (utility, generator, PV, battery). Due to limitations with split phase output capacities, he wants to use a 240 output unit with a step down transformer for 120 loads. After briefly considering it, I agree that the use of a step down presents advantages in the availability/selection of the solar units. Expanding beyond this particular question, I see the same advantage if he simply wanted to more efficiently use his generator (no solar) by not having to attempt to balance loads across legs - I've done this myself.
Thus I started searching for a single column panel. Finding that a suitable product from Siemens was discontinued (a generator panel) several years ago, the only other products I've found are industrial focused units.
I spoke with the local inspector regarding using a regular 3W panel and blanking one side as mentioned or jumping L1 to L2 and profusely labeling that the panel was for 120 loads only and he rejected both.
It seems that without a 2 wire panel, this may be a goose chase. Has anyone run into this?
