🎁 %value% %type% OFF ALL ITEMS AT THE CHECKOUT!

PROMO CODE:

OFF5

Consent Preferences Skip to content
Deals Now! Get Up to 10% Off ALL Solar Kits + Free Shipping
Deals Now! Get Up to 10% Off ALL Solar Kits + Free Shipping

Victron Autotransformer 120/240VAC

SKU 55872
Original price $899.00 - Original price $899.00
Original price
$899.00
$899.00 - $899.00
Current price $899.00

In Stock & Ready to Ship

All orders are shipped within 1-2 business days. Product ETA 7-14 business days.

Autotransformer 120/240V - 32A and 120/240 - 100A

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.

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)

Temperature protected
In case of overheating, the Autotransformer is disconnected from the supply. Reset is manual.

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.

Two stacked 120V 3kVA inverters will supply up to 25A to each 120V leg. If the load on one leg is less than 25A,
the maximum load on the other leg is still limited to 25A.

One 240V 5kVA inverter with a 32A Autotransformer will supply up to 21A of balanced load to each 120V leg.
Fewer loads on one leg will however result in more power being available on the other leg, with a maximum
unbalance of 32A.
Therefore the load can be up to 38,5A on one leg if the load is not more than 3,5A on the other leg (maximum
unbalance: 38,5 – 3,5 = 35A). If load unbalance is to be expected, a lower power 240V inverter with
autotransformer will therefore be preferable to the stacked inverter solution.

Document Library

Technical Datasheet

Shipping Information

FREE & FAST SHIPPING SAVE Hundreds Today with Free Shipping on All Orders. We Ship to ALL 48 Lower States (We do not ship to Puerto Rico, Hawaii, Alaska)

Lead Time - 3-7 Business Days Depending on Product
 - Once You Place an Order, We immediately begin processing, the order request is sent to our warehouse and is prepared for pickup, it then usually takes around 3-7 business days to be picked up for transit.

Transit Time
 - Transit Time can vary depending on the distance between your location and the warehouse but you can expect the item to arrive between 3-8 business days after pickup.

Our Shipping Partners: FedEx, UPS, Freight Club (among others)

Shipping Partners
We partner with the most reliable freight companies in the USA to ensure your order arrives safe and in a timely manner.

Your Item will ship from warehouses all across the United States to ensure fast and efficient delivery times for our customers.

If there are any delays regarding your product shipment, we will let you know in advance. 

Order Confirmation:

As soon as you place your order, you will receive an order confirmation e-mail. (please allow a few hours for this to come through in some cases) This means that we have received your order in our system and pre-authorized your credit card for the purchase. 

As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment. 

If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

Order Shipment:

If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order.  We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at sales@buildthepower.com

No Shipping outside the USA. (Some exceptions apply - if the website permits you to check out and enter your shipping address, you will receive your order. Some products in particular are available in Canada).

Shipping Options

Our base "Curb-side" Pickup shipping is always completely free! This option usually takes between 5-15 days to arrive at your doorstep, after you have submitted your order.

Threshold Shipping: This involves the item being brought onto your porch, or into a sheltered/garage area. 

Double-Check Your Address

To ensure that your package is properly delivered and that you receive your package within the time frames we advertise, please
make sure that your address is correctly entered and includes all relevant and/or required information. The use of correct
abbreviations, street numbers, building or apartment numbers, and route information (if applicable) is critical for ensuring
timely delivery. 
We do not take responsibility for lost, misplaced, or incorrectly delivered shipments if the address information
provided is incorrect or incorrectly entered at the time of purchase
.

Damages

Please inspect the packaging of your item(s) when they arrive, if you notice any damage, you should make note of it when signing for delivery.  If your item(s) do arrived damaged please send photos of damage, box and SKU, along with a brief description of the damage to sales@buildthepower.com and we will process an insurance claim on your behalf. Photos and videos must be sent for freight damage within 24 hours of arrival or the freight damage claim will not be valid. Any punctures, or visible signs of exterior damage must be reported within 24 hours.

Warranty

10 Years

Return Information

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

Should you decide to cancel your order prior to its shipment, a 3% deduction will be applied to cover platform fee expenses from the total paid amount.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Items that are not in this condition will not be accepted.

To start a return, you can contact us at sales@buildthepower.com If your return is accepted, we'll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

Returns for reasons other than damaged items will require a 15-25% re-stocking fee, this depends on the size and freight cost of the item to ship back, we sell large items and shipping can be costly. 

Returns/Cancellations after the item has shipped will also incur a 15-25% fee charged to you, as freight costs can be high for our products. 

If your return is outside of the 30 day return period, your item will not be accepted.

You can always contact us for any return questions at sales@buildthepower.com.

Damages and issues

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item so that we can evaluate the issue and make it right.

Items that are damaged must be communicated to us within 24 hours of receiving the item. 

Please note that if items have been taken out of the packaging and/or installed, returns may be voided depending on the manufacturer. 

Some of our manufacturers do not accept returns for specific items, this must be considered when purchasing. 

Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

Contact Information

You can contact us using the methods below. 

US Customer Support Number: +1 507 636 3614
Email: sales@buildthepower.com

Free Shipping

Free shipping on all orders

In stock & ready to ship

All orders are shipped within 1-2 business days

Hassle Free Returns

Hassle free return within 30 days

Excellent Customer Service

Questions? Give us a call today (507) 636-3614

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)