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  12 Volt Pro Multi-Tap Transformers 300W, 600W, 900W, 1200W | Low Voltage Landscape Lighting
Low Voltage Multi tap Transformers
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    • VoltPro Professional Series Landscape Light Transformers feature toroidal cores for professional results and commercial reliability.  There are 2 types of cores: stacked/laminated or toroidal.  Toroidal cores last longer, are more efficient and quieter than the more common laminated core transformers.  Toroidal cores cost more and are generally only available on higher end commercial transformers.
    • This is a Magnetic Transformer not an Electronic Transformer.  Magnetic transformers are the only solution you should consider for outdoor lighting systems.  Electronic transformers are small and inexpensive but typically only last 4-6 years and can be noisy (think of the smaller, but less reliable transformers that are in ballasts and florescent lights-- those are electronic transformers).  Magnetic transformers on the other hand last 20+ years.  We use heavy weight, reliable magnetic cores.
    • Premium components, windings, primary and secondary circuits.
    • Professional grade low voltage outdoor lighting transformer. Stainless steel cabinet. Weather proof door enclosure, stainless steel mounting bracket, separate circuit breaker toggle switches for each 300w zone.
    • Low voltage transformer designed specifically for outdoor lighting and landscape lighting professionals.
    • Multi-Tap Transformer (12 volt all the way to 22 volts). Enables you to compensate for voltage drop -- even on extra long runs of over 250'!
    • Ensures lights are all bright and even for professional results.
    • Large ports enable 6+ cable home runs per each 300w circuit.  (e.g. 6 home runs on a 300w transformer, 12 runs on a 600w, 18 runs on a 900w, 24 runs on a 1200w transformer!)
    • Timer and photocell ready ports (timer and photocell not included).
    • Toroidal core--runs cooler, quieter, more efficient, lasts longer.
    • Only draws as much electricity as needed to illuminate the bulbs you have -- e.g. a 1200w transformer will only draw 400w of power if you only have 400 watts of bulbs hooked to it.  The 1200w refers to the maximum wattage you can hook up to it.
    • Built-in stainless steel mounting bracket.
    • UL Listed, 10 year warranty.
    • Don't forget to order a timer or photocell for automatic operation

Product Instructions:
  • Magnetic Transformers vs Electronic Transformers

    Magnetic transformers use two coils, a primary coil and a secondary coil, to reduce the voltage from 120 volt down to 12 volts.  The primary coil carries the line voltage (110 v or 120 v).  The flow of electricity through the primary coil induces a magnetic field that creates a current in the secondary coil.  Since the secondary coil has fewer windings, it has a low voltage.  The size of the secondary coil or windings determines the voltage output of the transformer. 

    With-in magnetic transformers there are two types of coils or windings:  laminated/stacked cores or toroidal cores.  Laminated or stacked windings have sheets wrapped in copper wire that are then stacked or laminated together to make a core.  This is the more common, less expensive method for manufacturing a core.  Toroidal cores are one solid unit shaped like a donut and have the windings wrapped around the donut, in and out of the donut hole.  Toroidal cores are more efficient, don't buzz and rattle, run cooler but are more expensive to make. 

    In either case, toroidal or laminated cores, magnetic transformers use a lot of copper windings, are very heavy and expensive.  However they are the much more reliable, quieter and the only real solution for an outdoor lighting solution.

    Electronic Transformers use an inverter to change the frequency of the electricity form 50 Hz to about 20,000 Hz.  By not using bulky and heavy copper windings, electronic transformers can be very small, light and inexpensive.  As such they can even be incorporated into the lighting fixtures themselves.  All transformers that are small, light or built into a fixture are electronic.  The downside is they have short life spans and can be noisy.  For example you are probably familiar with the florescent light that takes a long time to come on or that florescent fixture that has failed-- that is usually the result of the electronic transformer in the ballast failing-- a very common occurrence.  Additionally they cannot take as high loads and their performance is effected by heat.  They hotter the operate or their operating environment, the shorter their life span.  Electronic transformers will not perform well in hot environments.

    In short magnetic and electronic transformers use two different technologies to lower the voltage-- one is inexpensive but unreliable, the other is heavy duty but bulkier and more expensive.

    Outdoor low voltage transformer QUICK START INSTRUCTIONS and TROUBLESHOOTING GUIDE
    (click link)

Product Info:
  • Stainless steel case
  • 300W & 600 W : Cabinet measures. 17"T x 7"W x 6"D  (300W unit =25lbs, 600W unit = 29lbs)
  • 900W & 1200 W : Cabinet measure  18"T x 10"W x 8"D  (900W unit = 47 lbs, 1200W unit = 50 lbs)  
  • Top Mounting bracket  1 1/4" tall, 3 keyholes, bottom mounting bracket 5/8" tall, open keyhole
  • Multi-tap voltage output from 12 to 22 voltsInput Voltage 120V A/C
  •  Output Voltage from 12-22V A/C.  Max output amps per circuit:  25 Amps
  • Huge tap connection ports -- each individual tap can hold up to 6 home runs!  That's 6 home runs per 300w circuit
  • E.g. 6 runs on a 300w, 12 runs on a 600w, 18 runs on a 900w, 24 runs on a 1200w transformer!
  • Latest technology -- TOROIDAL CORE transformer 
  • Toroidal core transformers are the best type of low voltage transformer you can buy.  They are more efficient, reliable and last longer than the lamenated magnetic transformers found on other brands
  • Toroidal cores also run cooler and quieter (no buzzing) than laminated magnetic core transformers.
  • Each port has large capacity and space so you can hook up to 6 different runs to each of the many ports giving you as many home runs as you could ever need
  • Has built-in timer and photocell ready ports (timer and photocell not included)

Product Dimensions:

Transformer Instructions

Quick Start


1.        The transformer plugs into an exterior GFI outlet.  Do not use extension cords with transformers.

2.       Each 300w circuit has its own circuit breaker (toggle switch) and Common (Black label that says COM).   E.g. a 300w transformer has 1 COMMON TERMINAL, 600w transformers have 2 COMMON TERMINALS, 900w transformers have 3 COMMON TERMINALS, a 1200w transformer has 4 300w COMMON TERMINALS.

3.       Use COMMON TERMINAL #1 until you begin to approach 300 watts of lamps used (for example when you reach 250-275 watts), then start using COMMON #2, and so on.


Connecting Home Runs to the transformer:

1.        The home run cable (e.g. 10/2 or 12/2) has two wires.  One wire gets connected to the COMMON TERMINAL (black label that says COM), the other wire connects to a VOLTAGE TERMINAL (the colored labels that say 12, 13,14, etc).  Which VOLTAGE TERMINAL you connect that particular wire on depends on the voltage you need for that run.  This is a MULTI-TAP transformer, which means you can output at a variety of voltages to compensate for VOLT DROP (see our learning area for more information on layouts and voltage drop).  For example, if you have a long run of 100 feet you may need to use the 15v VOLTAGE TERMINAL in order to have 12v of power all the way out at the far away fixtures.

2.       You can hook up multiple home runs to each and any of the terminals.  For example you may have 6 home runs, in which case you would have 6 wires in the same COM terminal and the other half of the 10-2 wires go into the colored terminals.  The VOLTAGE TERMINALS can have multiple runs/wires in each tap as well.

3.       To connect a home run wire to the terminals, split the 10-2 or 12-2 wire down the middle to separate the two wires and strip half an inch of insulation off each wire.  One end goes in the COM terminal, the other into a voltage terminal.  Loosen the terminal screws (small flat head screw driver) and insert the wire into the terminal opening which is located at the bottom (90 degrees from the terminal screw facing the bottom of the transformer).  Tighten screw to secure wire(s).



1.        Low voltage wire does not have polarity, it does not matter which of the 2 wire connects to the COMMON TERMINAL and which to the VOLTAGE TERMINAL, as long as one wire goes to each.

2.       Optional timers and photocells plug right into the transformer ports labeled and located inside the cabinet.

3.       It is easier to see and insert the wires into their terminals when the transformer is lying on the ground.  Affix all your wires BEFORE mounting the transformer.

Operating temperatures:

The VOLT® Toroidal Core Transformers run 10-20C cooler than laminated magnetic core transformers.  They are more efficient, use less energy, last longer and are more reliable.  They are also approved for mounting indoors as well.  Below is the normal operating temperatures of our transformers:


Maximum Surface Temperature ()

Temperature of Ambient ()

Toroidal 300W

30 (86F)

8 (46F)

Toroidal 600W

35 (95F)

7 (44F)

Toroidal 900W

39 (102F)

7 (44F)

Toroidal 1200W

54 (129F)

8 (46F)

If the VOLT® transformers are manufactured with thermal protection on the primary, they will automatically shut down when over-heated. 

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Average Customer Review: 5 of 5 Total Reviews: 163 Write a review.

  0 of 0 people found the following review helpful:
Extremely high quality product. July 1, 2013
Reviewer: Larry the Lands from Murrysville PA  
Extremely high quality product.  I would recommend it to anyone that doesn't want a transformer failure after a year or two.  I especially like the multi-voltage taps for long runs.

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  0 of 0 people found the following review helpful:
Excellent.. May 18, 2013
Reviewer: Susan from Avon ny  
Great buy for transformer good quality!

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  0 of 0 people found the following review helpful:
Excellent quality August 6, 2012
Reviewer: Jeff from Allen TX  
I bought a complete setup including transformer cables connectors lights and everything is of the highest quality.  Easy to set up especially with the 25' cord on the lights. Everything worked the first time and the quality will certainly last a long time.

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  0 of 0 people found the following review helpful:
Great Product July 31, 2012
Reviewer: Aaron from Denver CO  
Quiet operation and far and above better quality than a Malibu unit. I like being able to change the voltage and have the timer and photocell fit perfectly in the box. Powers a whole yard full of lights with ease and looks professional.

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  0 of 0 people found the following review helpful:
12v Transformer July 29, 2012
Reviewer: Carl G. from Cleveland  
Works great!  I love the different choices of voltages.  I have some long runs and having the different voltages resolves this issue.  Great product.

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