EcoFlow Delta Pro Ultra Transfer Switch & Smart Home Panel 2 Wiring Schematic
Compare the two code-compliant ways to wire an EcoFlow Delta Pro Ultra into your home: (Path A) the $500 30A/50A NEMA L14-30P Generator Inlet + Mechanical Main Panel Interlock, and (Path B) the automated 20ms EcoFlow Smart Home Panel 2 with 12 smart circuits.
Single-Line Electrical Schematic (SLD)
Service Rating: 30A Manual Transfer / 100A Subpanel via Smart Home Panel 2
=== PATH A: $500 MANUAL GENERATOR INTERLOCK (ZERO UTILITY PTO NEEDED) ===
[EcoFlow Delta Pro Ultra (7.2kW 240V Split-Phase)]
| (30A NEMA L14-30P Cord)
v
[NEMA L14-30R Power Inlet Box] ===(#10/3 AWG Cu Romex/THHN)===> [30A 2-Pole Breaker in Main Panel]
(Sliding Steel Interlock Plate Locks Out 200A Main)
=== PATH B: AUTOMATED SMART HOME PANEL 2 (20ms UPS + TOU PEAK SHAVING) ===
[Main 200A Panel (60A-100A Breaker)] ===(#3 AWG Cu)===> [EcoFlow Smart Home Panel 2 (12 Critical Branch Circuits)]
^
[Power In/Out Port] ----+---- [Up to 3x Delta Pro Ultra Inverters (21.6kW)]Conductor Gauge (AWG), Breaker & Torque Schedule (75°C Column)
| Circuit Segment | Conductor Gauge (AWG) | OCPD Breaker / Fuse | Conduit & Lug Torque |
|---|---|---|---|
| Path A: 30A NEMA L14-30R Inlet -> Main Panel Interlock Breaker | #10/3 AWG Copper w/ Ground (NM-B or THHN) | 30A 2-Pole Breaker in Top-Right/Left Slot w/ Listed Mechanical Interlock Kit | 3/4'' Conduit · Neutral remains Floating inside Delta Pro Ultra |
| Path B: Main Panel -> EcoFlow Smart Home Panel 2 (SHP2) Grid Input | #3 AWG Copper (for 100A feeder) or #6 AWG Copper (for 60A feeder) | 60A to 100A 2-Pole Feeder Breaker | 1-1/4'' EMT · Isolate Neutral and Ground Busbars inside SHP2 Subpanel |
NEC 2023 Code Compliance & Electrician Commissioning Checklist
⚖️ NEC 2023 CODE📜 Mandatory NEC Code Compliance Notes (NEC 2023 Art. 702 (Optional Standby Systems) & Art. 706)Pass your municipal AHJ rough and final electrical inspection on the first visit.
- ⚡NEC 702.5 Transfer Equipment: You must NEVER plug a battery or generator into a dryer outlet using a male-to-male 'suicide cord.' Always use a recessed male Power Inlet Box (NEMA L14-30P / SS2-50P) paired with a listed mechanical breaker interlock plate or Reliance Pro/Tran 2 transfer switch.
- ⚡Floating Neutral Requirement: Because your house main panel already bonds Neutral to Ground, the EcoFlow Delta Pro Ultra outputs a 'Floating Neutral' so connecting it to your house inlet does not trip GFCI breakers.
🛠️ COMMISSIONING✅ Master Electrician Pre-Energization & Commissioning ChecklistVerify polarity, CT orientation, and firmware before throwing the main breaker.
- ✓Test mechanical interlock plate slide action: verify it is physically impossible for the 200A Utility Main and 30A EcoFlow Inlet Breaker to be ON at the same time.
- ✓For Smart Home Panel 2, update firmware on both SHP2 and Delta Pro Ultra via the EcoFlow app before enabling Time-of-Use (TOU) automation.
❓ ELECTRICIAN FAQDo I need utility company permission (PTO) if I connect EcoFlow Delta Pro Ultra via a manual generator interlock?
No! Under NEC Article 702, an Optional Standby System connected through a mechanical interlock or break-before-make transfer switch cannot parallel with or backfeed the utility grid, so no utility interconnection agreement is required.
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