Zero-Export / Non-Export Solar & Battery Mode: Running Your System Before PTO or Under Utility Caps
Waiting 8 weeks for slow utility Permission to Operate (PTO), or expanding an existing NEM 2.0 system in California without losing your grandfathered status? Learn how Zero-Export (Non-Export) mode uses sub-second CT clamps to match solar+battery output to your exact home load with 0W sent to the street.
📲 Step-by-Step App & Firmware Configuration Walkthrough
How Zero-Export CT Feedback Works: Two split-core Current Transformer (CT) sensors clipped around your main utility service entrance wires measure grid flow 50 times per second. In Zero-Export mode, the inverter adjusts its output so the utility meter always sees a tiny +20W to +50W trickle import and 0W export.
Expanding California NEM 1.0 / NEM 2.0 Without Losing Grandfathered Status: In California (PG&E, SCE, SDG&E), if you expand your existing solar system by more than 10% (or 1 kW), the utility kicks you off grandfathered 1:1 NEM 2.0 onto NEM 3.0—UNLESS the new solar + battery expansion is configured as a certified UL 1741 PCS Non-Export system (like Enphase Non-Export or Tesla/EG4 Zero-Export)!
Why You Must Set a "20W–50W Grid Trickle Buffer": If you set the Zero-Export target to literally 0 Watts and turn off a 1,500W microwave, the inverter takes 200 milliseconds to ramp down—sending a brief 200ms pulse to the street. Setting "Zero-Export Power" to 30W–50W guarantees zero reverse meter pulses.
💡 Master Installer Pro-Tips & Optimization Shortcuts
- ✓Always verify CT clamp orientation and phase pairing (L1 CT on L1 wire, L2 CT on L2 wire, arrows pointing toward house loads) before enabling Zero-Export—reversed CTs in Zero-Export mode will force the inverter to export at 100% power!
Frequently Asked Questions: Zero-Export / Non-Export Mode Guide
What happens to surplus solar power at 1:00 PM in Zero-Export mode once my battery is 100% full?
Once your LFP battery reaches 100% SoC, the inverter smoothly curtains (throttles back) its MPPT solar harvest to match your real-time house load (e.g., if your house is using 1,800 Watts, the solar array produces exactly 1,800 Watts).