D2U Alternators

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D2U Alternators High Output Alternators in the UK and Europe. Supply, Install, Repair and Upgrade Service.
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07/09/2026

📢 D2U ALTERNATORS – CONTACT, ORDERS & CUSTOMER SUPPORT

We wanted to put a quick post together to explain a little more about how D2U operates, how best to contact us, and what you can expect when ordering from us.

D2U Alternators is a small specialist business that we operate alongside our full-time employment.

Because of this, our workshop and phone line are not continuously staffed during normal weekday working hours.

📞 CONTACTING US

We answer calls whenever we're able to, but there will be times during the working week when we simply cannot answer.

If you've tried calling and haven't received an answer, please don't assume you're being ignored.

We may simply be at work and unable to take the call at that time.

For existing orders, the best way to contact us is by your original order communication line or email [email protected]. Please include your full name and order details so we can locate everything and respond properly.

We will always try to respond as quickly as we reasonably can.

⚙️ BUILD TIMES

The majority of our high-output alternators are specialist products that are built, converted or remanufactured to order. They aren't simply taken from a shelf and dispatched, Hense the unusually long lead times.

Our current estimated lead times are provided when ordering and we ask customers to take these into consideration before placing an order.

We completely understand that waiting for an order can be frustrating, particularly when you're excited to finish a build or have an upcoming show or event.

We will always do our best to complete orders as quickly as possible, but we won't rush specialist builds at the expense of the quality and testing expected from us.

If you need an alternator for a particular date, event or show, please contact us before ordering so we can tell you whether that date is realistically achievable.

🤝 IF SOMETHING GOES WRONG

We're human, and occasionally things can go wrong.

If we've made a mistake, please give us the opportunity to investigate it and put it right.
We understand that delays, problems with an order or difficulty getting hold of us can be frustrating.

Genuine complaints and constructive criticism are absolutely fine, and where we've made a mistake, we'll take responsibility for it and do our best to resolve the situation fairly.

We'd always much rather have the opportunity to speak to a customer and resolve an issue than have somebody sitting at home unhappy with their experience.

❤️ A LITTLE RESPECT GOES BOTH WAYS

While we completely understand that customers can become frustrated, we do ask that communication remains respectful.

We will not tolerate abusive or threatening messages, harassment, personal attacks, or comments and allegations concerning ourselves, our families or our private lives.

These things have no place in resolving a customer order.

Criticism of D2U, our service or an order will always be taken seriously. We simply ask that it remains about the business and the issue at hand.

Where communication becomes abusive or personal, we reserve the right to require any further communication to be made in writing through our official contact channels.

Making a complaint will, of course, never affect your statutory consumer rights or warranty entitlement.

Finally, we'd like to say a genuine thank you to everyone who has supported D2U over the years.

We're a small specialist business, not a large company with a call centre and a team of staff behind the scenes. We appreciate every order we receive and every person who recommends us.

We know there are areas where we can improve, particularly communication during longer build times, and we're working to improve that.

Thank you for your patience, understanding and continued support. ❤️

D2U Alternators

🔋⚡ NEW & UPGRADED D2U LTO LITHIUM BATTERIES ⚡🔋Built. Tested. Ready to perform.Introducing our latest generation of D2U L...
16/06/2026

🔋⚡ NEW & UPGRADED D2U LTO LITHIUM BATTERIES ⚡🔋

Built. Tested. Ready to perform.

Introducing our latest generation of D2U LTO Lithium Batteries, designed specifically for high-performance car audio systems and demanding electrical setups.

Whether you're building a daily driver, a street beast, or a full competition vehicle, we've got a solution to suit your power requirements.

🔹 20Ah LTO Battery – £399.99

✅ Built & Ready To Use
✅ Tested up to 6KW RMS
✅ 1200 CCA @ 0°C
✅ 14.8–15.5V Compatible
✅ Balancer Included
✅ Compact, lightweight & high discharge capable
✅ Can be built to higher capacity if required
✅ Single Owner Lifetime Warranty

🔹 40Ah LTO Battery – £649.99

✅ Built & Ready To Use
✅ Tested up to 12KW RMS
✅ 2000 CCA @ 0°C
✅ 14.8–15.5V Compatible
✅ Balancer Included
✅ Extreme current capability for larger systems
✅ Can be built to higher capacity if required
✅ Single Owner Lifetime Warranty

⚡ Why Choose LTO?

✔ Ultra-fast charging
✔ Exceptional cycle life
✔ Excellent cold-weather performance
✔ Extremely low internal resistance
✔ Ideal for high-power car audio applications
✔ Built using premium LTO cells for maximum reliability

Every battery is supplied complete with an active balancer and is built to deliver the performance serious car audio enthusiasts demand.

💪 More power. Faster charging. Longer life.

📩 Message us for details, custom builds, or ordering information.

🚚 UK Shipping Available

💻 Order online:

https://www.d2ualternators.com/collections/batteries/products/20ah-lto-6kw-lithium-battery

🔋 Why Upgrade to a High-Output Aftermarket Alternator?If you’re running demanding electrical accessories in your vehicle...
16/03/2026

🔋 Why Upgrade to a High-Output Aftermarket Alternator?

If you’re running demanding electrical accessories in your vehicle, a standard factory alternator often struggles to keep up. High-output aftermarket alternators are designed to deliver significantly more charging power, keeping your electrical system stable and your batteries fully charged — even under heavy load.

🚗 Perfect for High-Demand Setups

High-output alternators are ideal for vehicles running:

• Powerful car audio systems with large amplifiers

• Camper vans & overland builds with fridges, lighting, heaters, and inverters

• Winch challenge or off-road vehicles using high-draw winches and auxiliary lighting

• Work vehicles with extra electrical equipment

⚡️Key Advantages

1️⃣ More Charging Power
Aftermarket high-output alternators can produce much higher amperage than factory units, ensuring your battery receives enough charge even when multiple accessories are running.

2️⃣ Stable Voltage
Large electrical loads can cause voltage drop, which can reduce performance or damage sensitive equipment. A high-output alternator helps maintain consistent system voltage.

3️⃣ Supports Bigger Electrical Systems
Whether you’re running multiple batteries, large amplifiers, winches, or inverters, the extra output ensures everything operates reliably.

4️⃣ Reduced Strain on Your Electrical System
When the alternator is capable of supplying the current your accessories need, it reduces stress on batteries and wiring, improving overall system longevity.

5️⃣ Better Performance at Idle
Many high-output alternators are designed to produce stronger output even at lower engine speeds — ideal for vehicles that power accessories while stationary.

🔧 Upgrade with Confidence
A properly matched high-output alternator can transform the reliability of your vehicle’s electrical system, especially for enthusiast builds, work vehicles, and adventure rigs.

💬 Got questions about upgrading your charging system or choosing the right alternator? Drop a comment or message us and we’ll be happy to help.

Due to extremely high demand, we are currently experiencing some delays with orders. We want to assure everyone that our...
16/03/2026

Due to extremely high demand, we are currently experiencing some delays with orders. We want to assure everyone that our team is working as hard as possible to get all orders prepared and sent out as quickly as we can.

We truly appreciate your support and patience while we catch up. Every order means a lot to us, and we’re doing everything we can to make sure you receive yours as soon as possible.

Thank you for bearing with us and for the amazing support! 🙏📦

🔊 PRICE DROP – Sundown Audio M Series 12” Subwoofers 🔊Dual 2ohm2000WRMS‼ ONLY 2 LEFT ‼Originally part of a set of 4 Sund...
10/03/2026

🔊 PRICE DROP – Sundown Audio M Series 12” Subwoofers 🔊

Dual 2ohm

2000WRMS

‼ ONLY 2 LEFT ‼

Originally part of a set of 4 Sundown Audio M Series 12” subwoofers, now only 2 remaining.

These subs were installed in a demo vehicle and have only seen around 2 months of light use, so they are in excellent / like-new condition, fully functional and extremely well looked after.

💪 Why Choose the Sundown Audio M Series?

The Sundown Audio M Series 12” is built for serious output. Designed to handle huge power while delivering deep, clean bass, these subs are perfect for:

• Demo builds
• High-output daily systems
• SPL setups
• Anyone wanting serious low-end performance

Key Features:

✔ Massive motor structure
✔ Heavy-duty suspension
✔ Very high power handling
✔ Built for both SPL and musical lows
✔ Premium Sundown Audio build quality

🛡 Warranty Included

Each subwoofer includes 12 months manufacturing defect warranty for peace of mind.

💰 Price – PRICE DROP

Was £499 each

🔥 NOW £399.99 each 🔥

If you're looking to build something loud, powerful, and reliable, these are ready to go.

📩 Message for more details or to arrange collection / shipping.

⚡ MARCH POWER UPGRADE EVENT ⚡Running a serious car audio system?Your electrical system needs to keep up.If you're experi...
08/03/2026

⚡ MARCH POWER UPGRADE EVENT ⚡

Running a serious car audio system?

Your electrical system needs to keep up.

If you're experiencing:
• Voltage drop
• Dimming headlights
• Weak or inconsistent bass
• Amps not performing properly

…it’s usually a sign your system needs a proper power upgrade.

💥 15% OFF orders over £600 throughout March
Upgrade your system with the right electrical foundation.

🔋 Lithium Battery Upgrades

Upgrade from standard stock lead-acid batteries for stronger voltage stability, faster recovery and improved system performance.

(AGM batteries are also available as an upgrade option for those who prefer them or are cautious about lithium.)

If you’re unsure which option is best, message us and we’ll happily talk you through lithium vs AGM setups and help put your mind at ease.

⚡ High Output Alternator Upgrades

Keep your batteries charged and your system supplied with the current it demands.
Perfect for high-power amplifiers and multi-amp systems.

🔧 Big 3 Upgrade Kits

Reduce voltage drop and improve current flow through your vehicle’s electrical system.
Available as full kits or individual components.

🧰 Supply & Install Support

We can supply everything required for the job and offer guidance to help ensure your install is done properly.

Whether you're upgrading a daily system or building a high-power demo / competition setup, we can support your build.

Full Range of Power System Components Available
✔ Power cables (various gauges)
✔ Busbars
✔ Distribution blocks
✔ Fuses & fuse holders
✔ Terminals & terminations
✔ Heat shrink
✔ Complete power upgrade kits
✔ Individual components

Everything needed to build a reliable, high-performance electrical system for car audio.

📅 Offer valid throughout March

💸 15% off orders over £600

📩 Message us to discuss your setup and receive a bespoke quotation tailored to your application.

Whether you’re planning a simple upgrade or a serious high-power build, we can help make sure your system has the power it deserves.

⚡ More Power. Stable Voltage. Cleaner, Louder Sound. 🔊🚗

High Output Alternators – Built to Support High Demand Electrical SystemsD2U Alternators specialise in high output charg...
05/03/2026

High Output Alternators – Built to Support High Demand Electrical Systems

D2U Alternators specialise in high output charging solutions for vehicles requiring significantly more electrical capacity than the factory system can provide.

Our alternators are commonly used in car audio builds, off-grid camper systems, recovery vehicles, winch challenge trucks and other high demand applications.

Solutions are available for approximately 99% of vehicles.

If a direct option is not immediately available for your vehicle, we will work with you to develop or adapt a suitable solution.

Available output options:

• 170amp – £299.99
• 190amp – £349.99
• 210amp – £399.99
• 270amp – £449.99
• 320amp – £499.99
• 370amp – £549.99
• 400amp – £599.99
• 425amp – £649.99

Prices are up to the values listed above for an alternator supplied with an internal regulator, plus delivery.

Quantity discounts available:

• 5% discount when purchasing 2 units
• 10% discount when purchasing 3 or more units

As standard, alternators are supplied with internal regulators isolated from ECU / computer control, allowing consistent voltage output without interference from factory charging strategies.

Units are available with several preset voltage set points depending on the intended application.

Where adjustable voltage control is required, external regulator options are available at additional cost. These are commonly used in lithium battery charging systems, high power audio installations and specialist electrical setups.

Delivery

• UK P&P – £20
• EU P&P – £50

Lead Time

Current estimated lead time is approximately 8 weeks from order placement to shipping, although this can vary depending on seasonal demand and build backlog.

For enquiries, please provide vehicle make, model, year, engine type and details of the electrical load or system you are running so we can recommend the most suitable alternator for your setup.

🔋⚡ **12KW AUDIO PACKAGE – ONE OFF PAYDAY DEAL** ⚡🔋From **D2U Alternators**Serious power for serious builds. No compromis...
27/02/2026

🔋⚡ **12KW AUDIO PACKAGE – ONE OFF PAYDAY DEAL** ⚡🔋
From **D2U Alternators**

Serious power for serious builds. No compromises.

We’ve combined our proven lithium technology with our high-output bespoke alternators to bring you a properly engineered **12KW capable setup** — built to handle real-world demo and competition systems.

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# # 💥 What’s Included:

🔋 **40Ah Lithium Battery**
Built using high-quality lithium cells and supplied with balancer included.
Designed for high discharge, stable voltage and brutal bass demands.

⚡ **340–400AMP Bespoke Alternator**
Custom built to suit your vehicle and engineered for maximum charging performance.

📌 **Once ordered, we will take your full vehicle details and produce the highest output alternator suitable to safely achieve the advertised power rating.**
Every unit is built specifically for your application — no generic off-the-shelf units.

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# # 🔧 Why This Package Works

✅ Built & Ready To Install
✅ Designed to Support 12KW Audio Builds
✅ High Idle Output
✅ Stable Voltage Under Load
✅ 14.2 – 15.5v Compatible
✅ Balancer Included
✅ 12 Months Warranty
✅ Engineered for Reliability

Whether you're upgrading your daily, building a demo car, or pushing serious competition numbers — this package keeps voltage strong and lights bright.

No dimming.
No voltage drop drama.
Just clean, consistent power.

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💷 **Usual Price: £1469.98**
🔥 **Payday Deal: £1099.99** 🔥

⚠️ One off February payday deal
⏳ 2 days only – until the end of February
📦 While stocks last

When they’re gone, they’re gone.

📩 Message us now to secure yours.

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🔌 We can also supply **cabling, fusing, terminations, and any other components required to complete your full power supply setup** — making D2U your one-stop solution for serious audio power.

⚡️ D2U Alternators 15.4V DC-DC Chargers – Built for 6S LTO Systems ⚡️Have you ever wondered about adding a high-power au...
23/02/2026

⚡️ D2U Alternators 15.4V DC-DC Chargers – Built for 6S LTO Systems ⚡️

Have you ever wondered about adding a high-power audio system to a top-of-the-range vehicle — without interfering with the factory charging setup or risking warranty issues?

Modern vehicles often run smart charging systems and tightly controlled voltage regulation. Modifying the stock charge system isn’t always desirable.

This is the answer.

https://www.d2ualternators.com/collections/dc-dc-converters

Our 15.4V DC-DC chargers provide a dedicated charging solution for 6S LTO battery setups, allowing you to support serious power demands while keeping the factory system operating as intended.

🔋 Input: 10–14.6V
🔋 Output: 15.4V (Optimised for 6S LTO)

🔥 Available Options:

• 60A DC-DC – Suitable for systems up to 3kW
• 100A DC-DC – Suitable for systems up to 5kW
• 130A DC-DC – Suitable for systems up to 7kW

✔ Units can be run in parallel for larger builds

⚙️ Where Does DC-DC Fit?

In most high-performance systems, the best solution is always a correctly specified high-output alternator.

However, in some vehicles that isn’t always possible — whether due to space limitations, smart charging systems, fixed voltage regulation, or specific set-voltage requirements.

That’s where DC-DC becomes the ideal support.

In some builds, upgrading the alternator simply isn’t practical. In others, the vehicle’s charging strategy prevents you from achieving the correct voltage for 6S LTO.

This is exactly where a properly integrated DC-DC system delivers the right solution.

You may:

✅ Run one alongside a D2U high-output alternator for maximum charging performance where your vehicle demands a specific set voltage or uses a smart charging regulator

✅ Use one where fitting a larger alternator isn’t practical

✅ Add a dedicated 15.4V secondary charge system while keeping the factory charging setup

✅ Fine-tune charging voltage specifically for 6S LTO banks

The right solution depends on the vehicle — and we’ll help you choose it.

📌 Important Installation Info:

• Input current approx. 35% higher than rated output
• Fuse at 35% above rated output current
• Minimum 0 AWG (50mm²) cable on BOTH input and output
• Must use 500A relay on input side
• 500A relay available if required

🔋 Complete Your Setup

Check out our 6S LTO batteries and all additional accessories required to make this system work correctly.

We can be your one-stop shop for alternators, DC-DC chargers, batteries, relays, wiring, and supporting components.

If you don’t see what you’re looking for on our website, send us a message — we’ll be happy to help.

https://www.d2ualternators.com/collections/dc-dc-converters

✅ 12 Months Warranty
✅ Full Installation Support Provided

Whether you need a high-output alternator, DC-DC support, or a complete charging strategy — D2U has you covered.

📩 Message us with your alternator rating and 6S LTO setup for compatibility confirmation.

Address

Heswall
CH618

Opening Hours

Monday 5pm - 12am
Tuesday 5pm - 12am
Wednesday 5pm - 12am
Thursday 5pm - 12am
Friday 5pm - 12am

Telephone

447948409610

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