Efreund
Member
- Location
- Phoenix, AZ
- Occupation
- Project Engineer
All,
Not sure if anyone has dealt with this before - I'm working on a project for a commercial client that requires battery and solar backup for a single phase, 120 V, 2-wire load. The 120 V, 2-wires come from one phase of a 120/208 V building subpanel.
To provide backup for the load and disconnect from the building in times of outage, I need to connect it to a Tesla Powerwall Gateway-type setup, which requires a 120/240 V split phase, 3-wire input. Most other reputable products in the size range I need have been optimized for 120/240 V residential sizes also.
Are there any problems with using an autotransformer to convert the 120 V, 1 ph 2-wire source to 120/240 V, 1 ph 3-wire to make the connection compatible with the residential optimized battery + ESS systems? Are there any recommendations of transformer products? Any lessons learned, code concerns, or advice?
If this can't work, are there any residential size systems built for 120/208 V, 277/480V, or 120 V, 2 wire 1 ph?
Not sure if anyone has dealt with this before - I'm working on a project for a commercial client that requires battery and solar backup for a single phase, 120 V, 2-wire load. The 120 V, 2-wires come from one phase of a 120/208 V building subpanel.
To provide backup for the load and disconnect from the building in times of outage, I need to connect it to a Tesla Powerwall Gateway-type setup, which requires a 120/240 V split phase, 3-wire input. Most other reputable products in the size range I need have been optimized for 120/240 V residential sizes also.
Are there any problems with using an autotransformer to convert the 120 V, 1 ph 2-wire source to 120/240 V, 1 ph 3-wire to make the connection compatible with the residential optimized battery + ESS systems? Are there any recommendations of transformer products? Any lessons learned, code concerns, or advice?
If this can't work, are there any residential size systems built for 120/208 V, 277/480V, or 120 V, 2 wire 1 ph?