The Güde GDB 24V/12V-250 digital battery charger is a professional charger with inverter technology and microprocessor control, compatible with all major 12 V and 24 V vehicle battery types. The charging process runs in 10 fully automatic stages including diagnosis, recovery, charging and maintenance functions. With a charging current up to 50 A and capacity up to 550 Ah, it is the most powerful model in the GDB range compared to the GDB 24V/12V-200. Features emergency jump-start up to 250 A and protection against overcharge, short circuit, overheating and reverse polarity. Made in Germany by Güde, founded 1948. Distributed in Italy by Krollit, official Güde distributor since 2007.
- Output voltage: 12 V / 24 V
- Effective charging current: 10 / 20 / 35 / 50 A
- Battery capacity: 20–550 Ah
- Mains voltage: 230 V / 50 Hz
- Mains power: 8,000 W
- Slow-blow fuse: 16 A
- Power fuses: 10 x 100 A each
- Emergency jump-start function: up to 250 A
- Jump-start without pre-charge: 35–50 Ah
- Compatible battery types: PB (lead-acid), GEL, AGM, WET, EFB
- Charging process: 10 fully automatic stages
- Display: LED for charging current, voltage and progress
- Dimensions: 304 × 295 × 674 mm
- Net weight: 19 kg
- Transport: 2 integrated wheels
Who uses the GDB 24V/12V-250 and for what
The Güde GDB 24V/12V-250 is used by mechanical workshops, auto electricians and automotive professionals who manage large-capacity batteries on heavy vehicles, buses, construction machinery and special vehicles with batteries up to 550 Ah. It is adopted in particular by fleet service centres with heavy commercial vehicles requiring charging currents up to 50 A, those who need the 250 A emergency jump-start function for large-displacement engines, and specialist workshops handling batteries with a capacity exceeding the 450 Ah covered by the GDB 24V/12V-200 model. The 2 integrated wheels make it easy to move despite the 19 kg weight.
Who it is for
| Profile | Compatibility | Reason |
|---|
| Workshop with heavy vehicles and batteries up to 550 Ah | Suitable | Current up to 50 A and capacity up to 550 Ah cover heavy vehicles with large batteries that the GDB 24V/12V-200 (max 450 Ah, 40 A) cannot handle |
| Fleet service centre requiring 250 A emergency jump-start | Suitable | The 250 A emergency jump-start function exceeds the 200 A of the previous model; covers large-displacement engines and vehicles with starting difficulties in critical conditions |
| User working exclusively on passenger cars and light vehicles with batteries up to 100 Ah | Not suitable | The 8,000 W mains power, dimensions and 19 kg weight are oversized for small batteries; the GDB 24V/12V-200 model is sufficient and more manoeuvrable |
Not suitable for: use on single light vehicles with small-capacity batteries, for which the GDB 24V/12V-200 model is sufficient; and for lithium batteries (LiFePO4), which are not listed among the compatible types declared by the manufacturer.
GDB 24V/12V-250 vs GDB 24V/12V-200 comparison
| Parameter | GDB 24V/12V-250 | GDB 24V/12V-200 | When to choose the 250 |
|---|
| Max charging current | 50 A | 40 A | Large-capacity batteries |
| Max battery capacity | 550 Ah | 450 Ah | Heavy vehicles, buses, special vehicles |
| Mains power | 8,000 W | 6,000 W | Faster charging on large batteries |
| Emergency jump-start | 250 A | 200 A | Large-displacement engines |
| Power fuses | 10 × 100 A | 10 × 50 A | Higher currents |
| Net weight | 19 kg | 16.8 kg | Same manoeuvrability with 2 wheels |
Technical specifications
| Mains voltage | 230 V / 50 Hz |
| Mains power | 8,000 W |
| Slow-blow fuse | 16 A |
| Output voltage | 12 V / 24 V |
| Effective charging current | 10 / 20 / 35 / 50 A |
| Battery capacity | 20–550 Ah |
| Power fuses | 10 x 100 A |
| Jump-start function | 250 A |
| Jump-start without pre-charge | 35–50 Ah |
| Battery types | PB (lead-acid), GEL, AGM, WET, EFB |
| Charging stages | 10 fully automatic |
| Display | LED: charging current, voltage, progress |
| Technology | Inverter with microprocessor control |
| Protections | Overcharge, short circuit, overheating, reverse polarity |
| Length | 304 mm |
| Width | 295 mm |
| Height | 674 mm |
| Net weight | 19 kg |
| Shipping weight | 20 kg |
| Transport | 2 integrated wheels |
| Clamps | Fully insulated |
| GTIN | 4015671966421 |
| Güde article code | 85129 |
| Compliance | CE |
Original Güde spare parts
| Code | Description | Price incl. VAT |
|---|
| 85129-01001 | Wheel | €5.39 |
| 85129-01002 | Wheel fastening | €2.09 |
| 85129-01003 | Wheel axle | €4.62 |
| 85129-01004 | Main circuit board | €59.90 |
| 85129-03005 | Circuit board with display | €21.99 |
| 85129-01006 | Fan | €14.18 |
| 85129-01007 | Relay | €19.69 |
| 85129-01008 | Rectifier | €32.90 |
| 85129-01009 | Connection socket | €3.19 |
| 85129-01010 | Pole cable with connector | €16.99 |
| 85129-01011 | Power fuse holder | €3.19 |
| 85129-01012 | Earth cable | €9.79 |
| 85129-01013 | Cable tray base | €5.39 |
| 85129-01014 | Cable tray cover | €4.30 |
| 85129-01015 | Carrying handle | €7.59 |
| 85129-01016 | Power fuse cover | €1.43 |
| 85074-01008 | 50 A fuse – pack of 2 | €6.49 |
| 85129-01018 | Red clamp | €7.59 |
| 85129-01019 | Black clamp | €7.59 |
Frequently asked questions
What is the main difference between the GDB 24V/12V-250 and the GDB 24V/12V-200?
The GDB 24V/12V-250 offers charging current up to 50 A (vs 40 A on the 200), capacity up to 550 Ah (vs 450 Ah), mains power of 8,000 W (vs 6,000 W) and emergency jump-start up to 250 A (vs 200 A). Power fuses are 100 A instead of 50 A. For standard batteries up to 450 Ah the GDB 24V/12V-200 is sufficient; the GDB 24V/12V-250 is required for higher-capacity batteries on heavy vehicles.
Can the GDB 24V/12V-250 charge a completely flat battery?
Yes. The Güde recovery function is designed for deeply discharged batteries down to 1.5 V. The charger automatically initiates a recovery cycle before the standard charging process. For direct emergency jump-start without pre-charge, batteries with a capacity of 35–50 Ah are required.
Is it compatible with AGM and GEL batteries in vehicles with Start&Stop systems?
Yes. The GDB 24V/12V-250 is compatible with AGM and GEL batteries, widely used in vehicles with Start&Stop systems. The battery type is selected via the control panel before starting the charge cycle.
Can the charger be left connected long-term?
Yes. Once charging is complete, the unit automatically switches to constant maintenance charge mode, allowing permanent connection without risk of overcharge. Useful for vehicles stored for extended periods or for winter battery maintenance.
What warranty does Krollit offer on the GDB 24V/12V-250?
The Güde GDB 24V/12V-250 battery charger is covered by the official Güde 24-month warranty. Krollit provides Italian-language technical support throughout the product's lifetime and holds original Güde spare parts in stock. To open a support request contact +39 0825-1494022.
Logistics and Krollit support
Shipping 5–9 working days (7 days for southern Italian regions). Italian-language technical support available throughout the product's lifetime. Original Güde spare parts available from Krollit stock, Monteforte Irpino (AV).
