How to Configure a Voltronic InfiniSolar Hybrid Inverter
InfiniSolar Configuration Overview
The Voltronic InfiniSolar series is a hybrid solar inverter that combines grid-tied operation with battery backup capability. Unlike pure off-grid inverters, the InfiniSolar can feed excess solar energy back to the grid while also charging batteries for backup during outages. Proper configuration ensures optimal energy management and maximum savings.
Before You Begin
- Ensure all wiring is complete and verified: PV strings, battery bank, AC grid connection, and load wiring
- Have the system documentation and wiring diagram on hand
- Verify PV open-circuit voltage is within the inverter's input range
- Confirm battery bank voltage matches the inverter setting (48V typical)
- Ensure grid connection has proper anti-islanding protection
Configuration Step 1: Operating Mode Selection
The InfiniSolar supports several operating modes accessible through the LCD panel or monitoring app:
Mode 1: Solar Priority (Self-Consumption)
Solar energy powers loads first, charges batteries second, and exports surplus to grid. This maximizes self-consumption and is ideal for reducing electricity bills.
Mode 2: Battery Priority
Solar charges batteries first, then powers loads, with grid as backup. Best for areas with frequent power outages where you want batteries always full.
Mode 3: Grid-Tie Only
All solar energy is exported to the grid. Batteries are charged from the grid for backup only. Suitable for feed-in tariff programs.
Configuration Step 2: Battery Settings
| Setting | Lead-Acid (AGM/GEL) | Lithium (LiFePO4) |
|---|---|---|
| Battery Type | AGE or GEL | LIB or USE (user-defined) |
| Bulk Charge Voltage | 56.4V (48V system) | Per BMS specification |
| Float Charge Voltage | 54.0V | Per BMS specification |
| Low Cutoff Voltage | 44.0V | Per BMS specification |
| Max Charge Current | Based on battery Ah rating | Per BMS specification |
Critical: For lithium batteries with BMS communication, enable the BMS protocol in settings. This allows the inverter to receive real-time battery status and adjust charging automatically.
Configuration Step 3: Grid Settings
- Grid voltage range: Set the acceptable input voltage range (typically 180-270V for the UAE)
- Grid frequency: 50 Hz for the UAE and Middle East
- Max feed-in power: Set the maximum power exported to the grid (may be limited by utility agreement)
- Anti-islanding: Must be enabled for grid-tied operation. This safety feature disconnects the inverter if the grid fails, protecting utility workers.
Configuration Step 4: PV Input Settings
- Max PV input voltage: Verify your string voltage does not exceed the inverter's maximum (typically 450-500V)
- MPPT range: Ensure your string voltage falls within the MPPT operating range for optimal tracking
- PV parallel/independent: If the inverter has dual MPPT inputs, configure whether they track independently (different orientations) or in parallel
Configuration Step 5: Monitoring Setup
The InfiniSolar supports multiple monitoring options:
- WiFi dongle: Plug the Voltronic WiFi module into the monitoring port for cloud-based monitoring via the app
- RS-485/Modbus: Connect to a local monitoring system or building management system
- SNMP card: For integration with IT infrastructure monitoring (data center applications)
Common Configuration Mistakes
- Wrong battery type setting: Using lead-acid settings for lithium batteries causes overcharging and potential damage
- Anti-islanding disabled: This is illegal and dangerous for grid-tied systems
- PV string voltage too high: Exceeding max input voltage damages the inverter permanently
- Feed-in power not limited: Some utilities require limiting export power — check your agreement
Frequently Asked Questions
Common InfiniSolar configuration questions.
Frequently Asked Questions
Can I use the InfiniSolar without batteries?
Yes, the InfiniSolar can operate in grid-tie only mode without batteries. In this mode, solar energy powers your loads and exports surplus to the grid. However, you lose the battery backup function — if the grid fails, the inverter shuts down (anti-islanding requirement). Adding batteries later is straightforward.
How do I update the InfiniSolar firmware?
Firmware updates are performed via USB flash drive or through the WiFi monitoring app (depending on model). Download the latest firmware from Voltronic's support portal, copy it to a USB drive, insert into the inverter's USB port, and follow the on-screen prompts. Always update during daylight hours when solar is available as backup power.
What happens during a grid outage with InfiniSolar?
When the grid fails, the InfiniSolar automatically switches to battery-backed off-grid mode (typically within 10-20 ms). It continues powering your loads from solar and batteries. When the grid returns, it seamlessly reconnects and resumes normal hybrid operation. Ensure your battery bank is sized for adequate runtime during expected outage durations.
