EG4 18kPV Generator Input, Warm-Up Delay & Dry-Contact Auto-Start Guide
How to wire and program the 90-Amp Generator Breaker on the EG4 18kPV hybrid inverter: setting Generator Rated Power, Warm-Up / Cool-Down timers, 55Hz–63Hz frequency tolerances, and closed-loop Chargeverter integration.
1. 3-Way Triad Electrical Engineering & Protection Rules
Why the EG4 18kPV 90A GEN Breaker Is Built for Whole-Home Generators: The EG4 18kPV features a dedicated 90-Amp 240V Generator Input breaker capable of passing up to 21.6 kW of generator power straight through to your home while simultaneously charging your EG4 PowerPro LFP battery bank at up to 12 kW!
Crucial Parameter — "Gen Rated Power (kW)" vs. "Gen Charge Current (A)": In the EG4 Monitor Center (Working Mode → Generator Settings), set "Gen Rated Power" to 80% of your generator’s continuous rating (e.g., 14.0 kW for an 18 kW propane standby). If your house suddenly turns on a clothes dryer while the battery is charging, the 18kPV automatically throttles back battery charging in milliseconds so total generator draw never exceeds 14.0 kW!
Engine Warm-Up & Cool-Down Protection: Set "Gen Warm-Up Time" to 60–90 seconds so your generator engine oil warms up before the 18kPV closes the heavy charging contactor.
2. Single-Line Wiring Schematic & Parameter Table
EG4 18KPV GENERATOR CONFIGURATION PARAMETERS =================================================================== 1. Gen Port Function: Generator Input (Default) 2. Gen Rated Power (kW): 80% of Continuous Fuel Rating (e.g., 9.0 kW) 3. Max Gen Charge Battery (A): 100A DC (~5.3 kW Charging Load) 4. Gen Start SoC % / Voltage: 18% SoC (or 50.8V DC) 5. Gen Stop SoC % / Voltage: 85% SoC (or 54.4V DC) 6. Dry Contact Terminal: GEN_NO & GEN_COM (2-Wire Auto-Start)
3. Direct-Wholesale Hybrid & Generator Interface Hardware
| Hardware Component | Engineering Specification | Est. Wholesale | Direct Source |
|---|---|---|---|
| EG4 18kPV Hybrid Inverter + EG4 14.3kWh PowerPro WallMount | 90A GEN Breaker, 200A Grid Pass-Through, UL9540 Listed | $8,198 | Check Price → |
| EG4 Chargeverter-GC 48V 100A (Closed-Loop RJ45 Communication) | Plugs into 18kPV/Battery Bus to Accept Any Portable Generator | $489 | Check Price → |
Generator & Hybrid Inverter Integration FAQ
When should I wire my generator into the EG4 18kPV GEN Port vs. an EG4 Chargeverter?
If you have a clean, permanent 1800 RPM liquid-cooled or well-regulated 22kW standby generator (or inverter generator), wire it directly to the 18kPV’s 90A GEN breaker. If you have a loud open-frame portable construction generator with >12% THD, wire it into the $489 EG4 Chargeverter so dirty AC never touches your home’s appliances!
Does the EG4 Chargeverter-GC have its own 2-wire generator auto-start relay?
Yes! The new yellow EG4 Chargeverter-GC includes built-in dry-contact auto-start terminals and closed-loop BMS communication so it can start and stop a 2-wire generator based on exact battery SoC %.