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HT Instruments PV-ISOTEST — PV Insulation Tester — PV Systems up to 1500 V DC
2 068.00 $
The HT Instruments PV-ISOTEST is a dedicated PV insulation tester rated at 1500 V DC, designed for commissioning, troubleshooting, and maintenance of photovoltaic systems, and compliant with EN 62446 / IEC 62446 (VDE 0126-23).
Unlike standard testers, it enables direct measurements on live PV strings — no external shorting adapter required. The device internally bridges the positive and negative conductors, allowing safe insulation testing without interrupting operation or adding setup steps.
The integrated Ground Fault Locator (GFL) pinpoints the exact location of insulation faults within a string, significantly reducing troubleshooting time on site.
It also includes all key functions for complete PV system verification:
- Insulation resistance testing (dual and timer modes)
- Ground fault localization (GFL)
- Protective conductor continuity testing
- Dielectric Absorption Ratio (DAR)/Polarisation Index (PI) calculation
- Multimeter for live voltage measurements
Designed for professional use, the PV-ISOTEST delivers efficient, accurate, and safe testing for modern high-voltage PV systems.
| Weight | 1.2 kg |
|---|---|
| Dimensions | 23.5 × 16.5 × 7.5 cm |
Online sales are only available in Europe and Southern Africa.
To obtain a quote for shipping outside these regions, please contact us using the form below.
This PV insulation tester is ideal for the following
- Insulation resistance testing on PV modules, strings, or full arrays during commissioning per EN 62446.
- Testing live PV strings without disconnecting terminals or using an external shorting adapter.
- Locating an insulation fault to the exact module position within a string.
- Verifying protective conductor continuity during PV system acceptance tests.
- Evaluating the condition of cable insulation on long or older DC wiring runs using Dielectric Absorption Ratio (DAR) and Polarisation Index (PI).
- Detecting AC voltage components on PV string conductors.
The results from the PV-ISOTEST can be used for the following
- Producing a commissioning report with documented insulation resistance values per string.
- Identifying degraded insulation before it causes inverter faults or safety hazards.
- Prioritising maintenance by pinpointing the exact string and module position of a fault.
- Supporting periodic inspection schedules as required by IEC/EN 62446.
- Providing documented evidence of insulation quality for handover, insurance, or compliance.
What is in the box
- HT Instruments PV-ISOTEST meter
- KITGSC4 — 4 test leads and 4 crocodile clips
- KITPCMC4 — 2 × MC4 connection adapters
- SP-5100 shoulder strap
- VA507 hard carry case
- 6 × 1.5 V AA batteries
- USB cable
- TOPVIEW PC software
- Quick-start guide and ISO 9000 calibration certificate
Key Features
- Tests live PV strings up to 1500 V DC — no external shorting adapter required
- Dual Mode: simultaneous Riso+ and Riso− display with instant pass/fail result
- Ground Fault Locator (GFL) pinpoints the insulation fault to the exact module position
- Timer Mode with automatic Dielectric Absorption Ratio (DAR) and Polarisation Index (PI) calculation
- Protective conductor continuity (RPE) at test current >200 mA
- Built-in multimeter for DC, AC RMS, and AC component voltage readings
- Stores up to 999 test results on board
- Data export to PC via optical USB and TOPVIEW software
- Compliant with EN 62446 / IEC 62446 (VDE 0126-23)
- CAT III 1000 V AC / CAT III 1500 V DC rated
- Runs on 6 × AA batteries — approximately 500 measurements per set
- Auto power-off after 5 minutes
PV-ISOTEST Technical Specifications
|
Parameter |
Range |
Resolution |
Accuracy |
|
DC Voltage |
3–1500 V DC |
1 V |
±(1.0% rdg + 2 dgt) |
|
AC Voltage |
3–1000 V AC |
1 V |
±(1.0% rdg + 2 dgt) |
|
Continuity Rpe |
0.00–1999 Ω |
0,01; 0,1; 1 V |
±(1.0% rdg + 2 dgt) |
|
Riso Timer Mode 250 V / 500 V |
0.01–9.9 MΩ |
0,01 MΩ |
± (5,0 % rdg + 2 dgt) |
|
Riso Timer Mode 500 V / 1500 V |
10.0–99.9 MΩ |
0,01 MΩ |
± (5,0 % rdg + 2 dgt) |
|
Riso Dual Mode 250 V / 500 V |
0,01 ÷ 9,99; 10,0 ÷ 19,9; 20 ÷ 100 MΩ |
0,01; 0,1; 1 MΩ |
± (5,0 % rdg + 5 dgt) |
|
Riso Dual Mode 500 V / 1500 V |
0,01 ÷ 9,99; 10,0 ÷ 19,9; 20 ÷ 100 MΩ |
0,01; 0,1; 1 MΩ |
± (5,0 % rdg + 5 dgt) |
|
GFL Fault Location* |
0,01 ÷ 9,99; 10,0 ÷ 19,9; 20 ÷ 100 MΩ |
0,01; 0,1; 1 MΩ |
± (5,0 % rdg + 5 dgt) |
|
Display |
128 × 128 px backlit LCD |
– |
– |
|
Memory |
999 test records |
– |
– |
|
Power supply |
6 × 1.5 V AA (LR6) or 6 × 1.2 V NiMH AA |
– |
– |
|
Battery life |
~500 measurements per function |
– |
– |
|
Auto power-off |
~5 minutes |
– |
– |
|
PC interface |
Optical / USB |
– |
– |
|
Dimensions / Weight |
235 × 165 × 75 mm / 1.2 kg incl. batteries |
– |
– |
|
Electrical safety standards |
IEC/EN 61010-1, IEC/EN 61010-2-030, -033, -034 |
– |
– |
|
Measurement standards, overvoltage category |
EN 62446, EN 61557-2, EN 61557-4, CAT III 1000 V AC – CAT III 1500 V DC |
– |
– |
PV-ISOTEST Product overview video
Warranty
All measurement instruments sold by AmpX are covered by the manufacturer’s warranty (typically 24 months on the main instrument, 12 months on accessories such as test leads, clamps and batteries). Exact terms are stated on the warranty card supplied with the device.
What you get at AmpX:
- Warranty handled locally in Germany and South Africa — no overseas returns required
- 30-day no-questions-asked return policy
- Local spare parts and repair service for selected brands, like Meatrol.
- Direct technical contact by phone, email or WhatsApp for any warranty issue
Warranty issue? Email info at ampx.co or WhatsApp
Germany: +49 175 246 5195
South Africa: +27 82 940 1858
AmpX Management
Technical support
If you have any difficulty with the meter setup, installation, data analysis, or anything else, we will gladly support you.
Please contact our technical support department for technical support by Email info at ampx.co or WhatsApp:
Germany: +49 175 246 5195
South Africa: +27 82 940 1858
Why buy at AmpX
- Local warranty support, we have offices and warehouses in Germany and South Africa.
- Local parts and repairs, we keep stock of parts and can repair equipment if required.
- Quick delivery, we only sell products that are in stock. Once we receive payment, goods are delivered within one week.
- Specialist support, we specialise in energy logging and reporting. If you have any questions, we are willing and able to support you. If you need assistance with meter setup, installation, data download, or data analysis, we can support you. Access to experienced electrical engineers by phone, WhatsApp and email.
- Peace of mind, you can return any product within 30 days, no questions asked.
- 2-year warranty, one additional year to the normal one year manufacturers warranty.
- Additional value, we might not be the cheapest, but we provide additional value above and beyond just delivering a product.
- Get the expertise and ongoing support that large online marketplaces can’t provide.
supporting professional energy projects in
Europe and South Africa.
Free Demonstration
We can offer you a free demonstration of our energy meters at our premises or within 100 km. If further away, we will need to charge for our travel expenses.
Alternatively we can also do an online video consultation and demonstration.
Click here to request a demonstration if 100 km from our address.
Click here to schedule an online video call and demonstration.
Request Quote
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