Architecture
VarioString connects high-voltage PV strings to a 48 V battery system. VS-70 uses one MPPT input; VS-120 offers two flexible inputs that can operate independently, in parallel or in series.
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Studer VarioString
High-voltage MPPT solar charge controllers for 48 V battery systems, up to 7 kW.
- 48 Vdc
- Up to 900 Vdc PV
- 70 / 120 A
Studer VarioString — Architecture
System integration
Direct communication with Xtender; NEXT systems use the Xcom-485i-nx gateway.
Applications
For 48 V off-grid, hybrid and storage systems where long PV strings reduce array-side current and cabling.
Models and technical data
Compare the current models, ratings and product codes in the range.
| Model | Product code | Battery | MPPT inputs | Output current | Recommended PV | Max PV Voc | Net weight |
|---|---|---|---|---|---|---|---|
| VS-70 | 108872 | 48 V | 1 | 70 A | 4 200 W | 600 Vdc | 5.51 kg |
| VS-120 | 108866 | 48 V | 2 flexible | 120 A | 7 000 W | 900 Vdc series | 7.5 kg |