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CTEKD250SE, 20A, 12V Battery Charger For Starter And Service Batteries In RV, Truck And Overlanding Vehicles, Solar Battery Maintainer, 12V Lithium Ion Battery Charger And Smart Alternator Compatible

Q: Wake up to no lights in conversion and amber light is on solid what does this mean how can I fix it?

Please contact CTEK directly so we can assist you better.

Q: What voltage should i see if i test on the output for a lifepo4 charging profile (black signal wire to the +)? shouldnt it be 14.6?

Please see page 12 of the D250SE user Manual for lithium charge program details including voltages.

Q: Can i use the d250se to charge a 24ah lifepo4 battery?

Our D250SE is designed for all types of 12V lead-acid batteries (WET, EFB, Ca/Ca, MF, AGM and GEL) and 12V (4cells) Lithium-ion batteries (Li-FePO4, Li-Fe, Li-iron, LFP) between 40-300Ah.

Q: Is the housing weather proof? Can I mount this under the hood or do I need to wire it into the cabin?

The D250SE is IP65 rated (splash and dustproof). It is not waterproof and must be protected from the elements. The D250SE should be mounted with in 6 feet of your service batter/battery bank. This charger requires both a starter battery and service battery.

4.4/5

Product ID: 186600064

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Details

Brand
CTEK
Color
Black
Product Dimensions
4.3"D x 7.6"W
Item Weight
700 Grams
Output Voltage
14.4 Volts

⚡20A high-efficiency charging

☀️MPPT solar optimization

🌡️Built-in temperature sensor

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Frequently Bought Together

CTEK D250SE, 20A, 12V Battery Charger For Starter And Service Batteries In RV, Truck And Overlanding Vehicles, Solar Battery Maintainer, 12V Lithium Ion Battery Charger And Smart Alternator Compatible

CTEK SMARTPASS 120S with Installation Kit

Description

🔋 Charge like a pro, wherever adventure calls!

SOLAR SMART - MPPT solar regulator maximizes your solar panel’s output—charge smarter, not harder.
SAFE SOUND - Splashproof, reverse polarity & short-circuit protected—guaranteed to safeguard your vehicle’s sensitive electronics.
POWER UP ANYWHERE - Delivers up to 20A to 12V lead-acid & lithium batteries (40–300Ah) for unstoppable energy on the road.
DUAL BATTERY MASTERY - Seamlessly charges service and starter batteries, automatically prioritizing power where it’s needed most.
ENGINEERED FOR EXTREMES - Built-in temperature sensor ensures peak charging performance in any climate—no compromises.

The CTEK D250SE is a compact, fully automatic 20A charger designed for 12V lead-acid and lithium (LiFePO4) batteries ranging from 40 to 300Ah. Featuring selectable charge algorithms, MPPT solar optimization, and smart alternator compatibility, it intelligently manages dual battery systems while protecting sensitive electronics with advanced safety features. Ideal for RVs, trucks, and overlanding vehicles, it ensures reliable, efficient charging in all conditions.

Specifications

Manufacturer	CTEK
Brand	CTEK
Model	CTEK D250SE (40-315), DUAL INPUT 20A CHARGER WITH SELECTABLE CHARGE VOLTAGES
Item Weight	1.54 pounds
Product Dimensions	7.6 x 4.3 x 2.6 inches
Country of Origin	China
Item model number	40-315
Exterior	Machined
Manufacturer Part Number	40-315
OEM Part Number	40-315

Have a Question? See What Others Asked

Wake up to no lights in conversion and amber light is on solid what does this mean how can I fix it?

What voltage should i see if i test on the output for a lifepo4 charging profile (black signal wire to the +)? shouldnt it be 14.6?

Can i use the d250se to charge a 24ah lifepo4 battery?

Is the housing weather proof? Can I mount this under the hood or do I need to wire it into the cabin?

Reviews

4.4

All from verified purchases

R**Y

Great product and price!

Install was straightforward, easy. Great product and design. Loving it so far!

11.02.2023

W**N

Works as advertised.

Easy to understand how to install. This charge controller is versatile. AGM or Lithium setup.

9.12.2021

J**S

Replaced one but didn't work again, frustrate wasting money

2nd battery charger. Already replaced once but didn't work again don't buy wasting money

22.06.2022

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