Studer Variostring VS 120 is the flexible charge controler for various configurations.

The Studer Variostring vs 120 MPPT solar charge controller is designed to work with one PV string up to 900 Vdc or two strings of 600V. Reducing cable sizes and installation costs while delivering outstanding performance. It operates together with the xtender or next series of inverter-chargers to build complete solar systems. It can also work alone in 48V systems for example, in a telecom system. The vario chargers have been used in standard solar systems as well in special applications (hydro, DC/DC converters, DC minigrid).

100% offgrid/ongrid

• World champion for efficiency in isolated converter with >98 % and high MPPT tracking efficiency >99.8%
• Low standby consumption (<1.25W) is perfect for an offgrid system.
• Directly compatible with our xtender series of inverter-chargers and our next series with the xcom 485i for offgrid/ongrid installations.

Practical

• Various possible configurations of the two PV inputs (series, parallel, independent).
• Reduces expensive wiring with higher voltage.
• Adaptable with access to more than 200 settings.
• Scalable with multi-unit options up to 15 units with the xtender series of inverter-chargers (105kW) and 5 units with the next series (35kW). 

Designed for a wide range of uses

• Offgrid and backup application
• Solar autarky (self-sufficiency) with our next series of inverter-chargers
• Minigrids application
• On board power
• Mobile application
• Telecom application (48V DC systems or 230V AC with inverters)
• Hydro and Wind DC power

More information about Studer Variostring VS 120:

• Datasheet