An on-grid solar inverter (also called a grid-tie inverter) is the core component of any solar system that connects to the public utility grid. Unlike off-grid systems, grid-tied setups don't require battery storage — solar energy is converted and fed directly into the grid, with users drawing power back as needed.
How It Works
The inverter takes DC electricity generated by solar panels and converts it into AC electricity synchronized with the grid's voltage and frequency. A built-in MPPT (Maximum Power Point Tracking) algorithm continuously optimizes energy harvest from the panels, regardless of cloud cover or temperature changes. When solar output exceeds household demand, the surplus is exported to the grid — in many regions, this qualifies for feed-in tariff credits.
An anti-islanding protection mechanism ensures the inverter automatically shuts down during grid outages, protecting utility workers from unexpected live circuits.
Single Phase vs. Three Phase
For residential installations, single-phase models (1.5kW–10kW) are the standard choice. They connect to standard household wiring and suit most rooftop solar setups.
Three-phase models (5kW–50kW) are designed for commercial buildings, industrial facilities, and larger solar farms where loads are distributed across three phases. They support dual MPPT inputs, allowing panels on different roof orientations to operate independently for maximum efficiency.
Key Specs to Compare
- MPPT voltage range — wider range (e.g. 180V–820V DC) gives more flexibility in panel string configuration
- MPPT efficiency — top-tier units reach 99.5%, minimizing energy loss
- Protection rating — IP65 is recommended for outdoor installation
- Communication — RS485, RS232, or WiFi for remote monitoring and data logging
- Transformerless design — lighter, more compact, and typically more efficient than transformer-based units
Power Range Overview
Our on-grid inverter lineup covers 300W to 50kW, with both single-phase and three-phase configurations available. Prices start from $127.93 for entry-level 300W units, scaling up to commercial-grade 50kW three-phase models.
