# Insulation Resistance Tester AZO UT503PV for Solar Cell Strings 125–1000V CAT II / 1000V CAT III / 600V

**URL:** https://aio.lv/en/product--azo-ut503pv--12034417
**Data updated:** 2026-03-12 16:43 (EET)
**Category:** Measuring tools
**Manufacturer:** AZO
**Manufacturer code:** UT503PV
**EAN:** 6935750550304
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 413.49 €
**Prices and availability valid until:** 2026-07-08 23:59
**Price without VAT (21%):** 341.73 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--azo-ut503pv--12034417

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Handheld insulation resistance tester AZO UT503PV designed for testing insulation of solar cell strings and PV installations. Measures across a voltage range of 125–1000 V with category ratings CAT II 1000 V, CAT III 600 V. Suitable for verifying insulation integrity, fault localization and routine maintenance of photovoltaic systems and electrical equipment.

## Long description

The AZO UT503PV insulation resistance tester is a handheld instrument designed for testing insulation in solar cell strings and photovoltaic installations. It performs insulation resistance measurements across a selectable voltage range from 125 V to 1000 V, allowing technicians to verify insulation integrity, identify leakage paths, and support routine maintenance of PV arrays and related electrical equipment. The meter’s safety category ratings support use in common PV system contexts and electrical environments.
Advantages
The tester provides a wide test voltage span for flexible measurement of insulation resistance on different segments of PV strings. Its handheld form factor enables on-site portability and straightforward operation by a single technician. The instrument is built with safety in mind and is rated for use in environments that require CAT II and CAT III protection levels, ensuring compatibility with typical photovoltaic system voltages. Measurement clarity and reliable resistance readings make it suitable for diagnostic and verification tasks.
Suitable for
Testing insulation resistance of solar cell strings and PV modules
Periodic maintenance and insulation integrity checks of photovoltaic systems
Fault localization and detection of leakage currents in PV arrays
Verification of insulation after installation or repair work
Key specifications
Test voltage range: 125–1000 V (selectable)
Measurement function: insulation resistance testing for photovoltaic applications
Safety ratings: CAT II at 1000 V, CAT III at 600 V
Form factor: handheld, portable design for field use
Intended application: solar cell strings, PV installations and associated electrical equipment
How to use
Before testing, ensure the PV string or equipment is de-energized according to safety procedures and isolate the circuit. Select an appropriate test voltage within the 125–1000 V range based on the system under test and manufacturer recommendations. Connect the tester’s leads to the conductors and grounding points as required, observing correct polarity and secure connections. Initiate the measurement and observe the insulation resistance reading; compare the value to the applicable safety or installation thresholds. After testing, discharge any stored energy in the system and restore the circuit following safety protocols.
Usage recommendations
Use appropriate personal protective equipment and follow local safety standards when working on photovoltaic systems. Choose a test voltage that is representative of the operating conditions but within the device’s and system’s safe limits. Record measurements for trend analysis and to support maintenance records.

## FAQ

### How much does the Insulation Tester AZO UT503PV 125–1000V cost, and is it available for purchase?

The price is 413.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Insulation Tester AZO UT503PV 125–1000V be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All AZO products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized AZO service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12034417/67521833_large.webp