Reading Inverter Parameters
Reading Your Inverter Display
Decode PV voltage, battery SOC, grid status, and error codes on your inverter screen.
8 min read
Simple and practical
Beginner level
No solar background needed
PH context
Made for local homes
What you will understand
Visual Learning Map
Lesson Guide
Key Parameters to Monitor
PV (Solar Input)
- PV Voltage (V): Should be within MPPT range (typically 120–500V)
- PV Power (W): Current solar generation
- PV Current (A): Current flowing from panels
Battery
- SOC (%): State of Charge — how full your battery is
- Battery Voltage (V): 48V nominal for home systems
- Charge/Discharge Current: Direction and rate of battery flow
Output
- Load Power (W): What your home is consuming now
- Grid Status: Connected / Disconnected / Bypass
Normal Ranges (Hybrid, 48V)
| Parameter | Normal Range |
|---|---|
| PV Voltage | 150–400V |
| Battery SOC | 20–100% |
| Battery Voltage | 48–58V |
| Load | Varies by home |
Frequently Asked Questions
What is a good PV voltage?
Within your inverter's MPPT range. Low PV voltage often means shading, loose connection, or faulty panel.
What SOC should I maintain?
Keep above 20% for lithium longevity. 80–100% is normal during sunny days.
What does 'Grid Connected' mean?
Your system is synced with Meralco. Power flows both ways (with net metering).
What is bypass mode?
Inverter passes grid power directly to loads, bypassing inverter circuitry. Normal during certain grid conditions.
How do I read error codes?
Check your inverter manual. Common: E01 overload, E02 battery low, E05 PV fault, E08 over temperature.
Common Mistakes to Avoid
Ignoring gradual PV voltage drop
A slow decline over weeks may indicate panel degradation or connection corrosion.
Running battery to 0% regularly
Damages battery lifespan. Set minimum SOC to 20% in inverter settings.
Not checking parameters after typhoons
Inspect PV voltage and error logs after storms. Loose connections are common.