{"product_id":"ut503pv-solar-pro-pv-insulation-tester","title":"UT503PV Solar Pro PV Insulation Tester","description":"\u003cstyle\u003e\n.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;}\n.ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;}\n.ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;}\n.ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;}\n.ut-cat p{margin:.6em 0;}\n.ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;}\n.ut-cat img{max-width:100%;height:auto;}\n.ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;}\n.ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;}\n.ut-cat td strong{color:#222;}\n\u003c\/style\u003e\n\u003cdiv class=\"ut-cat\"\u003e\n\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003cp\u003eThe UT503PV is built for solar work: it measures insulation resistance on live photovoltaic systems at up to DC 1000 V, so a string can be tested without taking the array offline or short-circuiting panels — including after dark. It tests to IEC 62446 with test voltages from 125 V to 1000 V and a measurement range up to 4000 MΩ, and it's rated CAT II 1000 V \/ CAT III 600 V with an IP54 sealed body for outdoor use.\u003c\/p\u003e\n\u003cp\u003eStepped-voltage testing, a comparison function, automatic discharge, and a high-voltage alarm cover the safety and diagnostic basics, while 1000 result sets store on-board and transfer over USB or a Bluetooth app for commissioning reports. It's backed by UNI-T's nearly 40 years of test-meter manufacturing.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eLive PV insulation testing up to DC 1000 V — no array shutdown required\u003c\/li\u003e\n\u003cli\u003eTest voltages: 125 V, 250 V, 500 V, 1000 V (IEC 62446)\u003c\/li\u003e\n\u003cli\u003eInsulation resistance up to 4000 MΩ, accuracy ±(1.5%+5)\u003c\/li\u003e\n\u003cli\u003eStepped-voltage testing and comparison function\u003c\/li\u003e\n\u003cli\u003eAutomatic discharge and high-voltage alarm\u003c\/li\u003e\n\u003cli\u003e1000-set storage; USB and Bluetooth app\u003c\/li\u003e\n\u003cli\u003eCAT II 1000 V \/ CAT III 600 V; IP54 sealed body\u003c\/li\u003e\n\u003cli\u003eCompact ~0.5 kg handheld for rooftop and field work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eUT503PV Details\u003c\/h2\u003e\n\u003ch3\u003eLive PV Insulation Testing\u003c\/h3\u003e\n\u003cp\u003eThe UT503PV measures insulation resistance on energized photovoltaic strings up to DC 1000 V, so you can verify a system without disconnecting it or short-circuiting panels — and because it doesn't depend on irradiance, testing works after dark when the array is at a stable voltage.\u003c\/p\u003e\n\u003ch3\u003eBuilt to IEC 62446\u003c\/h3\u003e\n\u003cp\u003eTest voltages from 125 V to 1000 V and a 4000 MΩ range follow the IEC 62446 framework for commissioning and periodic verification of PV installations, giving a documented insulation result for sign-off.\u003c\/p\u003e\n\u003ch3\u003eSafety for High-Voltage DC\u003c\/h3\u003e\n\u003cp\u003eAutomatic discharge clears stored charge after each test, a high-voltage alarm warns of live leads, and the CAT II 1000 V \/ CAT III 600 V rating with an IP54 sealed body suits outdoor rooftop and ground-mount work in the field.\u003c\/p\u003e\n\u003ch3\u003eDocumentation \u0026amp; Connectivity\u003c\/h3\u003e\n\u003cp\u003eStore up to 1000 result sets and transfer them by USB or a Bluetooth app, with a comparison function for pass\/fail thresholds — practical for commissioning packs and recurring maintenance records.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eSolar PV installation and commissioning to IEC 62446; periodic insulation checks on operating arrays; EV-charging and battery-energy-storage DC wiring verification; and rooftop and ground-mount maintenance where live testing avoids taking a system offline.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003ch3\u003eCan the UT503PV test energized PV systems?\u003c\/h3\u003e\n\u003cp\u003eYes — it measures insulation resistance on live PV strings up to DC 1000 V, so the array does not have to be shut down or short-circuited.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003ch3\u003eCan it test at night?\u003c\/h3\u003e\n\u003cp\u003eYes. Because the measurement does not rely on irradiance, testing works after dark when the string is at a stable voltage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003ch3\u003eWhat standard does it follow?\u003c\/h3\u003e\n\u003cp\u003eTest voltages and ranges follow IEC 62446 for photovoltaic system commissioning and verification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTest Voltages\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125 V \/ 250 V \/ 500 V \/ 1000 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsulation Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eup to 4000 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIR Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±(1.5% + 5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePV Insulation Resistance (live)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eup to 4000 MΩ, ≤ DC 1000 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 to 1000 V, ±(1% + 4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 to 600 V, ±(1% + 4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShort-Circuit Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1.5 mA (IR) \/ \u0026lt; 1.2 mA (PV IR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStepping Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAuto Discharge\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompare Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh Voltage Alarm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eData Storage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1000 sets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eData Communication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB + Bluetooth app\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSafety Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCAT II 1000 V, CAT III 600 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIP Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP54 (cap closed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (L × D × H)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e161 × 117.3 × 63 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≈0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch4\u003eDocumentation\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/storage.googleapis.com\/uni-tdocuments\/Meter%20Datasheets\/UT503PV_datasheet.pdf\"\u003eUT503PV Datasheet\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/storage.googleapis.com\/uni-tdocuments\/Meter%20User%20Manuals\/UT503PV_User_Manual.pdf\"\u003eUT503PV User Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e","brand":"Uni-Trend US","offers":[{"title":"Default Title","offer_id":46595296985249,"sku":"180200200087X","price":598.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/5649\/2449\/files\/UNI-T_UT503PV_6_sq.jpg?v=1782259617","url":"https:\/\/aaashopus.com\/products\/ut503pv-solar-pro-pv-insulation-tester","provider":"SHOPSHOPSHOP","version":"1.0","type":"link"}