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Eco-Worthy 12V 20A & 40A DC to DC Charger On-Board MPPT Battery Charger

Name: Eco-Worthy 12V 20A & 40A DC to DC Charger On-Board MPPT Battery Charger
Brand: eco-worthy-uk
Price: 99.99 GBP
Availability: InStock
Rating: 4.81 (31 reviews)

£99.99

£99.99 ~~£139.99~~

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SKU:

SKU:UK-L03DCDC20A-1

[Multi-Input 40A Efficient Charging]-ECO-WORTHY 40A DC-DC charger supports alternator and solar panel input. This multi-stage charger provides stable charging for AGM, GEL, lead-acid, lithium, and calcium batteries, making it ideal for RV, camper, marine, and off-grid dual battery systems.

[Safe One-Way Charging Design]-Built-in starter and house battery isolation allows one-way charging only, preventing the house battery from draining the starter battery. Improves safety and ensures your vehicle always has enough power to start when needed.

[Full Protection System]-Equipped with multiple safety protections including starter battery low-voltage protection, overcharge protection, overload protection, and short-circuit protection. Keeps both starter and service batteries safe during charging in all conditions.

[Smart MPPT Solar Charging]-Integrated MPPT controller improves solar charging efficiency and supports automatic charging memory. IP65 waterproof design allows reliable operation in outdoor environments, perfect for RV, boat, and off-grid solar charging systems.

[Easy Installation & Status Indicator]-Clearly labeled wiring ports for solar, alternator, and battery connections make installation simple. LED indicators show charging status and help quickly identify wiring issues, ensuring stable and reliable system operation.

Style 20A 40A 20A with 12V 100ah Battery 40A with 12V 280ah Battery

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FAQs

On-Board MPPT Battery Charger

Eco-Worthy 20A、40A DC to DC charger has unique charging options. This multi-stage, multi-input battery charger can charge home batteries by connecting to the starter battery of a car alternator or by connecting a solar panel directly to the unit. Provides proper charging for AGM/GEL, Lead acid, Lithium and Calcium batteries.

Technical Specifications

12V 20A DC to DC Charger

12V 40A DC to DC Charger

Type:

Multi Stage

DC battery Input:

12.4-16.0V

Output / Charging Voltage:

14.4-15.4V

DC Output:

20A

Minimum Start Voltage:

2.0V-For Battery Being Charged

Soft Start:

Yes

Soft Charge Current:

20A

Solar Output:

16-25V

Solar input:

Type:

Multi Stage

DC battery Input:

12.4-16.0V

Solar input:

16-25V

Output / Charging Voltage:

14.4-15.4V

DC Output:

40A

Solar Output:

40A

Minimum Start Voltage:

2.0V-For Battery Being Charged

Soft Start:

Yes

Soft Charge Current:

40A

Included in the Box

20A DC to DC Charger

40A DC to DC Charger

20A DC to DC Charger
1X12v 100AH Lithium Battery
Accessories

20A DC to DC Charger
1X12v 280AH Lithium Battery
Accessories

User manual

Eco-Worthy 12V 40A DC to DC Charger On Board MPPT Battery Charger- User Manual

Download

Eco-Worthy 12V 20A DC to DC Charger On Board MPPT Battery Charger- User Manual

Download

Excellent 12V 40A DC-DC MPPT Battery Charger

The charger works very well, and does not drain my Starter Battery, as some other manufacturers of DC-DC Chargers do.
Thank you 🙏

Motorhome essential for powering fridge etc. while on the move

Arrived promptly and exactly as described. Instructions supplied with the unit were a bit basic and didn't properly describe how the unit switches between alternator power and solar power using the integrated MPPT controller. Basically, Solar is disabled while the engine is running. Otherwise Good Value.
This unit is ideal for allowing my 20 year old Motorhome to charge the leisure battery on the move as well as power the new DC/AC/Gas fridge. The original dual output alternator had been replaced a long time ago. I now have two 120W bifacial solar panels connected to this charger to power everything when parked up. The length of cable required to connect the charger to the engine battery is not supplied - beware cable descriptions online which often state a muchly larger wire size than actually supplied. Anderson connectors are supplied but check online about assembling these correctly. You will also need to purchase an in-line fuse to connect to the leisure battery. With better instructions for use, I would give it 5 stars.

Excellent product, price and customer service

I installed my DC to DC charger in July last year and product was simple to install and worked great, it developed a problem in April this year, I contacted Ecco-worthy and sent a couple of videos of the issue and they sent me out a brand new unit for free then next day, cannot ask for better than that, excellent customer service, highly recommend buying from Ecco-worthy as they have you covered.

Easy to install and works well.

The charger wasn't working properly when i installed it , i have sent message to the customer service and got very quick reply and advise. Turned out my earth connection was not good enough. Everything works as it should now. Very impressed with the customer service.

Connections difficult

I would much preferred to have terminals to connect to, rather than flying leads.
Seems to work OK, but only charges momentarily at 40A. Most of the time it's at 27A

1 2 3

Frequently Asked Questions

How do you test lithium battery performance?

When measuring the battery's rated voltage, it is recommended to first disconnect the connection wires between the battery and the load, inverter, and charger to ensure accurate results.

What’s the relationship between lithium battery voltage and SOC?

①During battery use, it is recommended to keep the SOC at 20%~80% to extend the battery life (charge to at least 13.3V) ②If the battery is not used for a long time (more than half a year), at least 50% of the power should be guaranteed, otherwise the battery may be over-discharged and damaged. ③After fully charged, if the battery voltage is greater than or equal to 13.3V after one hour without any connections, it is within the normal range. ④This table is only the test result under ideal conditions. After adjusting to the correct parameters, the voltage drops to 13.26V, which does not prove that the battery capacity is insufficient. The actual capacity needs to test the power of the connected load and the length of use.

How to activate a protected lithium battery?

A:Take 12.8V battery as an example, when the voltage drops to 0~2V, the battery BMS may enter protection state, and the battery needs to be reactivated. Method 1: Use an AC-DC LiFePO4 Lithium charger with activation function, set the charging voltage to 14.6V for charging. After 30~60 minutes, use a multimeter to measure the voltage. If the voltage changes, continue to charge. Method 2: Use a solar panel and controller with activation function. In an environment with good lighting conditions, connect the solar panel, controller, and battery, and set the charging voltage to 14.6V for charging. After 30~60 minutes, remove the battery connection wire, use a multimeter to measure the voltage. If the voltage changes, continue to charge.

Solar Panel Performance Testing Method

Disconnect all wires from the solar panel. Use a multimeter to measure both short-circuit current (Isc) and open-circuit voltage (Voc) under sunny outdoor conditions.Note: Performance may vary due to controller temperature and battery charge level.

What kind of warranty and support do you offer?

We provide up to a 10-year warranty on key battery models, along with U.S.-based support. Our team assists with installation guidance, troubleshooting, and system planning to ensure a smooth experience.

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Eco-Worthy 12V 20A & 40A DC to DC Charger On-Board MPPT Battery Charger