Description
xVictron Skylla-TG 48/25 (1+1) 230V High Power Battery Charger
The Victron Skylla-TG 48/25 is a high power, single-output 48V battery charger rated at 25A, designed for professional and industrial applications where reliable, high-current charging is required. It is suited to off-grid systems, marine installations, and large battery banks where a compact, robust charger is needed.
Key Features
- 48V output at 25A continuous charge current for large battery banks.
- Single-phase 230V AC input with wide input voltage tolerance.
- Adaptive 4-stage charge algorithm: bulk, absorption, float, and storage.
- Temperature-compensated charging via optional sensor to protect battery life.
- Compact, wall-mountable enclosure weighing 5.5 kg.
- Compatible with Victron VE.Bus and system monitoring via optional interfaces.
- Suitable for lead-acid battery chemistries including AGM, gel, and flooded.
Product Overview
The Skylla-TG range is Victron's high power transformer-based charger series. Unlike switch-mode chargers, the transformer-based design provides galvanic isolation and high tolerance to poor or unstable AC input quality, making it well suited to generator-fed systems, marine shore power, and industrial environments where mains quality cannot be guaranteed.
The 48/25 model delivers 25A at 48V, providing up to 1,200W of charge power. The adaptive charge algorithm adjusts absorption time based on the previous discharge, which reduces unnecessary gassing and extends battery service life. The storage mode drops the voltage to a low maintenance level when the battery remains connected for extended periods without cycling.
The unit accepts a single-phase 230V AC supply and is designed for permanent installation. It can be integrated into larger Victron systems using optional monitoring accessories, and the (1+1) designation indicates the unit supports a parallel output configuration for increased charge current when two units are used together.
Technical Specifications
| Parameter | Value |
| SKU | SDTG4800251 |
| Output Voltage | 48V |
| Output Current | 25A |
| AC Input Voltage | 230V single phase |
| Weight | 5.5 kg |
| GTIN | 8719076025801 |
Applications
- Off-grid battery systems with 48V battery banks requiring high-current charging.
- Marine vessels with 48V house battery systems connected to shore power or a generator.
- Industrial and telecoms backup power installations.
- Generator-fed charging where AC input quality is variable.
- Parallel charging configurations using two Skylla-TG 48/25 units for increased output.
What Is Included
- 1x Victron Skylla-TG 48/25 (1+1) 230V battery charger
Installation Notes
The Skylla-TG 48/25 must be installed by a qualified electrician. Connections to battery banks, AC supply, and any parallel configuration should comply with current wiring regulations (BS 7671 in the UK). For marine installations, compliance with applicable marine electrical standards is required. Ensure adequate ventilation around the unit during operation. Optional temperature sensor and monitoring accessories should be sourced separately.
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.