The HERF-1200 is a micro-inverter from Estar Energy (Estar/HERF) designed for solar panels. It's a "4-in-1" micro-inverter, meaning it can connect four solar panels (or modules) across two MPPTs. It converts the direct current (DC) from the panels into alternating current (AC) to enable grid-tie connection.
Specifications
| Feature | Value / explanation |
|---|---|
| Warranty period | 10 years (product warranty) |
| DC / Input (DC side) | • Recommended panel power: approx. 240-420+ W modules per input • MPPT voltage range (operating voltage): 16-48 V • Starting voltage: 22 V • Maximum DC voltage: 60 V • Maximum DC current: 4 × 13 A (distributed over the inputs) |
| Number of MPPT / inputs | 2 MPPTs, 4 DC inputs (so 2 inputs per MPPT) |
| AC / Output (AC side) | • Rated power AC: 1200 VA / 1200 W • Nominal AC voltage: 230 V (common in NL/EU), with AC range 180-270 V • Frequency range: 45-55 Hz around 50 Hz • Maximum AC current: ~ 5.22 A (based on power at 230 V) |
| Efficiency & consumption | • Maximum efficiency: approx. 96.5 % • CEC peak efficiency ~ 99.5% (under certain conditions) • Night consumption / standby consumption: < 0.05 W |
| Protection class & temperature range | • IP67 – Dust and splash/water proof in outdoor conditions • Working temperature: -40 °C to +65 °C |
| Mechanical / dimensions / weight | • Dimensions: approx. 275 × 204.5 × 41.6 mm (width × height × depth) • Weight: ~ 4.9 kg • Cooling: natural convection (no fan) |
| Other functions / communication | • Communication via 2.4 GHz wireless possible; optionally with a data logger (“DCU”) to manage monitoring, limits, etc. • Power factor adjustable (cos φ) ≈ 0.8 (leading or trailing) • Low harmonic distortion (THD <3%) |
Plus points
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Higher power per unit : The HERF-1200 delivers around 1.2 kW AC, which is relatively high for microinverters — meaning you need fewer units for a given total power.
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Four solar panels per unit : makes installation more compact/cheaper compared to one inverter per panel, while still benefiting from module-level MPPT.
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Robust protection (IP67) and wide temperature range ensures reliability in outdoor conditions.
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Low starting voltage and wide MPPT range means it can deliver power even in less than ideal light conditions/cloud cover.
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Low night-time consumption minimizes losses when PV panels are not producing power.
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Flexible installation : modular operation, option to monitor performance via app/data logger.
The integrated EMS automatically optimizes consumption, storage, and grid load. In the event of a power outage, the system switches to backup power within ≤10 ms.
With a built-in EMS (Energy Management System), support for peak shaving, and flexible charge and discharge settings, energy balance is automatically adjusted to consumption, grid status, and storage.
With an IP66 enclosure, silent passive cooling, and real-time monitoring via app or WiFi, the inverter offers reliability, ease of use, and minimal maintenance requirements.
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