Varistor set

SMA STP-TV9 Varistor Set – Genuine Spare Part

The SMA Varistor Set, reference STP-TV9, is a replacement component manufactured for SMA brand inverters. It is intended for use in preventive or corrective maintenance operations on photovoltaic equipment, allowing the replacement of original varistors.

Role of Varistors in a Solar Inverter

Varistors (Voltage Dependent Resistors) are electronic components whose resistance changes according to the applied voltage. In a photovoltaic inverter, they provide protection by absorbing transient overvoltages that could otherwise damage internal circuits. Regular replacement, or replacement following a surge event, helps maintain the electrical integrity of the inverter.

Compatibility and Use

This varistor set is a genuine SMA part, referenced STP-TV9. Before placing an order, it is recommended to verify the compatibility of this reference with the exact model of your SMA inverter. If in doubt, our technical team is available to assist you in identifying the correct part for your installation.

Maintaining Your Photovoltaic System

Regular maintenance of SMA inverters contributes to the longevity of your solar installation and helps optimise energy production. The replacement of worn or faulty components such as varistors should be carried out by a qualified person, in accordance with applicable electrical safety standards.

Ordering and Delivery

Wattuneed (Solar-Tech Engineering SCRL) supplies this SMA spare part to professional installers, maintenance technicians, and knowledgeable end users in France and Belgium. VAT rates are 20% for France and 21% for Belgium.