Studer VarioString VS-70 - 18 Technical Data; General Specifications; Input (PV Generator); Output (Battery)

Studer Innotec SA
VarioString
58 V 2.3 User manual
18 TECHNICAL DATA
18.1 GENERAL SPECIFICATIONS
18.2 INPUT (PV GENERATOR)
18.3 OUTPUT (BATTERY)
VarioString
VS-70
VarioString
VS-120
Galvanic isolation
Yes
Maximum conversion efficiency
> 98%
MPPT efficiency
>99%
PV grounding possibility
PV +, PV -, floating
Consumption max en stand-by
25 mA (1.25W)
Warranty
5 years
Weight
5.55 kg
7.5 kg
Dimensions h x w x l (mm)
120 x 220 x 350
133 x 322 x 466
Use in parallel
Up to 15 units
Solar generator connection
Sunclix
Max wire size (battery)
25 mm
2
70 mm
2
Glands (battery)
2xPG16
2xPG21
VarioString
VS-70
VarioString
VS-120
Maximum solar power recommended (@STC)
4200 W
7000 W
Maximum open circuit voltage (Voc)
600 V
Parallel or independent
connection
600 V
Connection in series
900 V
Minimum functional circuit voltage
200 V
Parallel or independent
connection
200 V
Connection in series
400 V
Maximum short circuit current
13A
Series or independent
connection 13A
Parallel connection
26A
VarioString
VS-70
VarioString
VS-120
Nominal battery voltage
48V
Battery input voltage range
(18V)-38- 68V
Max. charging current of the battery at
25/40°C
70A
120 A (60A par MPPT)
Charging phases: (adjustable threshold and
duration)
4 phases : Bulk, Absorption, Floating, Equalization
Battery temperature compensation (with
accessory BTS-01)
-3mV/°C/cell (ref. at 25°C)
adjustable -8 to 0 mV/°C/cell