Understanding Inverters
Inverter Basics
The inverter is the brain of your solar system — here's how to choose the right one.
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
What Does an Inverter Do?
The inverter converts DC power from panels into AC power for your home. It also:
- Maximizes power harvest (MPPT tracking)
- Monitors system performance
- Protects against grid faults
- Manages battery charging (hybrid models)
Inverter Types
String Inverter
- One central unit for all panels
- Most affordable for simple roofs
- Best for unshaded, uniform installations
Hybrid Inverter
- Built-in battery charging
- Grid + battery backup
- Most popular in PH for brownout protection
Microinverter
- One small inverter per panel
- Best for complex/shaded roofs
- Higher cost per watt
Sizing Rule
Inverter size ≈ 80–120% of panel array wattage. A 5 kW panel array typically uses a 5–6 kW inverter.
Frequently Asked Questions
Hybrid or string inverter?
Hybrid if you want battery backup (recommended in PH). String if grid-tied only and budget-conscious.
What is MPPT?
Maximum Power Point Tracking — the inverter constantly adjusts to extract maximum power from panels.
Why is my inverter beeping?
Usually indicates fault: overload, low battery, grid issue, or high temperature. Check display for error codes.
How long do inverters last?
10–15 years typically. Budget for replacement around year 10–12.
Can I add batteries later?
Only with hybrid inverters or by adding a separate battery inverter. Plan ahead!
Common Mistakes to Avoid
Undersizing the inverter
An inverter too small for your panel array will clip power on peak sunny days, wasting generation.
Wrong inverter for system type
Don't use a grid-tied inverter for off-grid. Match inverter type to your system design.
Ignoring IP rating
PH weather is harsh. Use IP65+ rated inverters for outdoor/tropical durability.