HT Instruments I-V400 Photovoltaic (PV) Tester

HT Instruments I-V400 Photovoltaic (PV) Tester
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The I-V 400 allows the on field measurement of I-V curve as well as of the main parameters of a single module and of a whole  photovoltaic system up to a maximum of 1000V and 10A. 

The acquired data are then worked out and transferred to the reference conditions (STC) in order to compare them with the rated data declared by the manufacturer of those modules. The comparison between the detected and the rated data permits to immediately determine whether the string or the module respect the parameters declared by the manufacturer.

The instrument allows to perform quick tests (IVCK) to measure the open voltage Voc and short circuit current Isc on PV module/strings output also without irradiation conditions I-V 400 manages an internal database of the most common photovoltaic modules. Such a database can be updates at any time by the user both through the management software and directly through the instrument’s interface.


  Range Resolution Accuracy
VDC Voltage @ OPC 5.0 ÷ 999.9 V*** 0.1 V ±(1.0%rdg+2dgt)
IDC Current @ OPC 0.10 ÷ 10.00 A 0.01 A ±(1.0%rdg+2dgt)
Max Power @ OPC
(Vmpp >30V, Impp >2A)
50 ÷ 9999 W*,** 1 W ±(1.0%rdg+6dgt)
VDC Voltage
(@ STC and OPC), IVCK
5.0 ÷ 999.9 V*** 0.1 V ±(4.0%rdg+2dgt)*,**
IDC Current
(@ STC and OPC), IVCK
0.10 ÷ 10.00 A 0.01 A ±(4.0%rdg+2dgt)**
Max Power @ STC
(Vmpp >30V, Impp >2A)
50 ÷ 9999 W*,** 1 W ±(5.0%rdg+1dgt)**
Accuracy is calculated as ± [% reading + (number of dgts) x resolution] at 23°C ± 5°C, <80%HR
(***) The I-V curve and Rs measurements start for VDC > 15V and the accuracy is defined for VDC > 20V
Vmpp = Maximum power voltage, Impp = Maximum Power Current
(*) Max measurable value of Power must include FF value(~ 0.7) → Pmax = 1000V x 10A x 0.7 = 7000W
(**) Test is stopped and the message “Thermal instability” occurs if the instrument detects Voltage > 700V and Current I >3A, I > - 0.038*V + 37.24 - 0.5