Marelli Automatic Voltage Regulators
A Marelli AVR is the small control board that keeps your generator's voltage steady. At General Power, we stock genuine Marelli automatic voltage regulators for the alternators used in industrial, commercial, rental, and emergency power systems. We have supplied power generation equipment from Miami, Florida since 1999.
How a Marelli AVR Keeps Generator Voltage Steady
Every time a motor starts or a large load shuts off, the voltage coming out of a generator wants to jump or sag. The AVR senses that change and adjusts the current going to the exciter field, which pulls the voltage back to its set point. This protects computers, drives, and other sensitive equipment connected to the generator.
Marelli regulators use solid state electronics and are fully insulated, so they keep working in places with humidity, dust, and vibration. They are designed for the synchronous alternators built by Marelli, and we also carry regulators for other alternator makes if your fleet is mixed.
Choosing the Right Automatic Voltage Regulator
The safest way to choose a replacement is to match the part number printed on the regulator you are removing. If that label is worn off, the alternator nameplate will give us what we need to identify the correct unit. Before you order, it helps to have a few details ready.
- The model number on the old AVR or the alternator nameplate
- The generator's voltage, frequency, and phase
- Whether the unit runs alone or in parallel with other generators
- The conditions on site, such as heat, moisture, or heavy vibration
With this information, our team can confirm fit before your order ships. That saves you from return shipping and extra downtime. If a failed regulator damaged other components, we also stock replacement parts for Marelli alternators, including rotating rectifier sets.
Marelli AVR Models for Analog and Digital Control
Marelli offers both analog and digital regulators. The M00FA122A is the Mark VX model, while the M31FA600A digital regulator is the MEC-20 type for buyers who want digital control. Digital units fit well in systems that already use modern generator control panels.
Other regulators we carry include the M16FA667A, the M40FA610A, and the M71FA300. Each one is made for specific alternator designs, so they are not always interchangeable. When in doubt, send us your part number and we will confirm the match.
Why Buyers Trust General Power
General Power is an original equipment manufacturer, master distributor, and authorized dealer with more than 20 years in the industry. We have served over 10,000 customers in more than 100 countries on every continent. When you order a Marelli AVR from us, you get more than the part.
- Same day quoting and same day shipping on stocked regulators
- Sales specialists and engineers who are each certified by the Electrical Generating Systems Association
- Bilingual staff who can help in English or Spanish
- After sales support for wiring, setup, and troubleshooting
- An A+ rating from the BBB
Because we are a one stop shop, you can order your regulator along with complete Marelli generator ends or full diesel generator sets in a single shipment. Our large inventory means the part you need is usually ready to leave our warehouse right away. Request a quote today and we will help you get your generator back to steady, reliable power.
