| Brand | Ametek Programmable Power |
|---|---|
| Voltage Models | ETS60 (60 Voc) / ETS80 (80 Voc) / ETS150 (150 Voc) / ETS600 (600 Voc) / ETS1000 (1,000 Voc) |
| Power (per unit) | 840 W (ETS60/80/150) up to 15 kW (ETS600/1000 × 3-unit) |
| Bandwidth | Up to 30 kHz closed-loop |
| Output Capacitance | Low (high-speed redesign) |
TerraSAS ETS Series — Standalone Terrestrial Solar Array Simulator
The Elgar TerraSAS ETS Series is a compact, standalone photovoltaic (PV) solar array simulator combining an agile power supply and an innovative I-V curve generator in a single rack unit. Featuring low output capacitance and high closed-loop bandwidth up to 30 kHz, the ETS is designed for testing grid-tied solar inverters, micro-inverters and DC power optimisers.
- Standalone PV simulator: power supply + I-V curve generator in one unit
- High bandwidth: up to 30 kHz closed-loop (critical for high-speed MPPT testing)
- Low output capacitance: accurately reproduces AC ripple on DC input
- Voltage models: ETS60/80/150 (micro-inverters), ETS600 (isolated string), ETS1000 (non-isolated string)
- Multiple units can be connected in parallel for higher power or in series for higher voltage
- SCPI remote control via Ethernet; optional GPIB; GUI software included
- Real-time I-V curve display updated 20× per second
- 1-year standard warranty
| Model Group | Voc Max | Power/Unit | Form Factor | Application |
|---|---|---|---|---|
| ETS60X14C-PVF | 60 VDC | 840 W | 1U | Micro-inverters, DC optimizers |
| ETS150X5.6C-PVF | 150 VDC | 840 W | 1U | Micro-inverters, DC optimizers |
| ETS600X8 | 600 VDC | 5,000 W | 3U | Isolated string inverters |
| ETS600X25 | 600 VDC | 15,000 W | 3U | Isolated string inverters |
| ETS1000Y5 | 1,000 VDC | 5,000 W | 3U | Non-isolated string inverters |
| ETS1000Y15 | 1,000 VDC | 15,000 W | 3U | Non-isolated string inverters |
Modern solar inverters use advanced MPPT algorithms that actively probe the I-V curve of the connected PV source by injecting ripple current onto the DC bus and measuring the response. This means the PV simulator must accurately reproduce the AC ripple behaviour of a real solar array — a capability that conventional power supplies with large output capacitors cannot provide. The TerraSAS ETS achieves this through a fundamental redesign of the output filter stage, reducing capacitance by an order of magnitude and extending the closed-loop bandwidth to 30 kHz. The real-time I-V curve display at 20 Hz allows engineers to observe the inverter's operating point and MPPT tracking behaviour dynamically during test.
30 kHz MPPT Test Bandwidth
10× lower output capacitance and 30 kHz bandwidth accurately simulate the AC ripple behaviour of real PV panels — enabling validation of even the fastest MPPT algorithms.
Complete Voltage Coverage
From 60 V micro-inverters to 1,000 V non-isolated string inverters, one product family covers the entire terrestrial PV inverter market.
Real-Time I-V Display
Dynamic I-V curve display updated 20× per second provides immediate visual confirmation of MPPT tracking behaviour during test.
Scalable for Higher Power
Multiple ETS units connect in parallel for higher power or in series for higher voltage — enabling string, multi-string and system-level inverter testing.
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