SKU: 12098102029

Victron Autotransformer - Split Phase 120/240V - 100AMP

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Description

Victron Autotransformer - Split Phase 120/240V - 100AMPAutotransformer Split Phase 120 240V 100AMP The Autotransformer: for step up, step down and split phase balancing An autotransformer can be used for step up, step down and split phase output balancing purposes. While the step up and step down functions are fairly straightforward, split phase output balancing may require some more attention. Consider for example a 30A 120 240V split phase supply. The supply could be the grid, a generator or two stacked

Autotransformer - Split Phase 120/240V - 100AMP

The Autotransformer: for step up, step down and split phase balancing An autotransformer can be used for step up, step down and split phase output balancing purposes. While the step up and step down functions are fairly straightforward, split phase output balancing may require some more attention. 

Consider for example a 30A 120/240V split phase supply. The supply could be the grid, a generator or two stacked inverters. Some of the loads connected are 240V, others are 120V. On each 120V leg the load should not exceed 30A. The problem is that as soon as 120V loads are connected, the two legs will show a different current. This is because the 120V loads on the two legs will never be balanced. A 120V 1200W hairdryer, for example, will draw 10A from one leg. A 120V washing machine could even draw in excess of 20A from one leg. Between the two legs the difference in current, or current unbalance, will therefore often be 20A or more. This means that the 30A supply will not be used up to its full potential. By the time one leg draws 30A, the other leg may be drawing no more than 10A, and increasing the 240V load, for example, will result in an overload of one leg while the other leg still has spare capacity. Theoretically, the total power that can be drawn from a 30A 120/240V supply is 30 x 240 = 7,2 kVA. In case of 20A unbalance, the practical maximum will be 30 x 120 + 10 x120 = 4,8kVA, or 67% of the theoretical maximum. The solution is an Autotransformer. By leaving the neutral of the split phase supply unused, and connecting an Autotransformer to create a new neutral, as shown in figure 1, any load unbalance is ‘absorbed’ by the Autotransformer. In case of a 30A supply, the load can be increased to 7,2kVA, and a 20A load unbalance will result in one leg supplying 40A, and the other leg 20A. The 20A difference will flow through the neutral and the windings of the Autotransformer. The current through both 120V wires of the split phase supply will be 30A. 

Temperature protected In case of overheating, the Autotransformer is disconnected from the supply. Reset is manual. Ground relay for use with Multi or Quattro Inverter/Chargers included When operating in inverter mode, the neutral output of the inverter/charger must be connected to ground to guarantee proper functioning of a GFCI. In case of a split phase supply the neutral must be grounded. For this purpose a grounding relay is built in the autotransformer’s enclosure. The relay is controlled by the 230/240V Multi or Quattro. (The internal grounding relay in the 230/240V Multi or Quattro must be disabled) 

An alternative to stacked inverters The alternative to stacking two 120V inverters to provide a 120/240V split phase supply is a 240V inverter with an additional Autotransformer.

Warranty Info

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

Please contact your dealer for any returns, repairs or support issues related to this product.
Manufacturer : Victron Energy
Manufacturer Part No : ITR000100101
UPC : 8719076022428
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SKU: 12098102029

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John Degen
Alexandria, US
★★★★★ 5
Smells amazingly like cherry, but expect a mess under the feeder.
Style: Wild Bird Food, Style: Wild Bird Food
This is a fantastic budget seed blend to keep your backyard feeders full during the busy seasons. I put a banana in the picture next to this massive 10-pound bag for scale, though I wouldn't recommend leaving the fruit out there unless you want to feed the local raccoons instead. The most surprising part of this bag is the smell—it has a very strong, sweet cherry scent right out of the bag that genuinely seems to bring in the local cardinals and blue jays faster than plain seed. THE GOOD: • The cherry flavoring actually works as an attractant, and the sheer volume of seed you get for the price makes this an excellent value for high-traffic yards. • It brings in a huge variety of ground-feeding birds, especially mourning doves and juncos. THE TRADE-OFF: • This is a "value" mix, which means it contains a very high percentage of filler seeds like milo and cracked corn. Finicky songbirds will actively kick the milo out of the hanging feeder to get to the black oil sunflower seeds, creating a massive pile of rejected seed on the ground. THE BOTTOM LINE: A great-smelling, budget-friendly birdseed that attracts a ton of wildlife, provided you don't mind the ground-feeders cleaning up the mess underneath.
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Reviewed in the United States on May 30, 2026
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Amazon Customer
Pawtucket, US
★★★★★ 5
Has attracted a mix of birds.
Style: Wild Bird Food
Great value for the price. Since putting this out, we’ve had so many different kinds of birds visiting our yard. The birds seem to love the mix, and it has definitely brought more activity to our feeders. I also compared prices before purchasing, and this was very comparable to similar products and bag sizes. Overall, it’s a quality bird seed at a fair price, and I would absolutely buy it again
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Reviewed in the United States on May 20, 2026
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Angela Felan
Birmingham, US
★★★★★ 5
Great for local birds
Style: Wild Bird Food
This bird seed has been a great find for attracting birds here in North Texas! Within just a couple of days of putting it out, we started seeing a noticeable increase in activity. It brings in a nice variety too—cardinals, finches, doves, and even the occasional blue jay. The mix seems fresh and well-balanced, with very little waste. I also appreciate that it doesn’t have a ton of filler seeds that birds usually ignore. Everything in the blend actually gets eaten, which makes it feel like a better value. It holds up well in our unpredictable Texas weather, and I haven’t had issues with mold or clumping. Overall, if you’re looking to attract a wide range of local birds and keep your feeder busy, this is definitely worth trying!
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Reviewed in the United States on April 28, 2026
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Cat
Massapequa, US
★★★★★ 5
Great Bird Attraction & Solid Value for the Price
Style: Wild Bird Food
This bird seed has been a great addition to our yard. It attracts a wide variety of birds + they seem to really enjoy the cherry flavor.. it doesn’t sit untouched like some other mixes I’ve tried. The quality is solid, with a good mix that looks fresh and not overly dusty. It also seems easy for the birds to digest, as they keep coming back + there’s minimal waste left behind. I mean.. enjoying the bird without the poop - WIN! The 10-pound bag is a great size.. enough to last a while without constantly needing to restock. For the quantity you get, it’s definitely good value for the money. Overall, a reliable choice if you’re looking to attract more birds without overspending. If your debating.. BUY NOW
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Reviewed in the United States on April 2, 2026
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buttercup
West Palm Beach, US
★★★★★ 4
Good price
Style: Wild Bird Food
Birds love most of this, but the small filler they just leave this behind.
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Reviewed in the United States on May 30, 2026

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