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.

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.

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.

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.

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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

Product ID: 159636534

Details

Brand
CTEK
Colour
Black
Item weight
700 Grams
Output voltage
12 Volts
Product dimensions
10.9D x 19.3W

⚡20A max charging power

🔋Supports 40–300Ah 12V batteries

☀️MPPT solar panel optimization

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Description

🔌 Charge smarter, roam farther — never get left powerless again!

POWER UP ANYWHERE - Delivers a robust 20A charge to keep your 12V lead-acid or lithium batteries ready for any adventure.
SAFE INTELLIGENT - Splashproof, reverse polarity and short-circuit protected with clean, surge-free power—no need to disconnect sensitive electronics.
ALL WEATHER PERFORMANCE - Built-in temperature sensor adapts charging for peak efficiency in any climate, rain or shine.
SOLAR OPTIMIZED CHARGING - Integrated MPPT regulator maximizes solar energy use, turning sunlight into reliable power on the go.
SMART DUAL BATTERY MANAGEMENT - Automatically switches charging from service to starter battery, ensuring your vehicle starts every time.

The CTEK D250SE is a cutting-edge 20A fully automatic 12V battery charger and maintainer designed for RVs, trucks, and overlanding vehicles. Compatible with lead-acid and LiFePO4 lithium batteries from 40 to 300Ah, it features selectable charge algorithms, smart alternator compatibility, and an MPPT solar regulator for optimized solar charging. Its intelligent dual battery management automatically redirects power to the starter battery once the service battery is full. With built-in temperature sensing and comprehensive safety protections, it ensures efficient, reliable charging in all conditions without risking vehicle electronics.

Specifications

ASIN	B07X4YTP1P
Amperage	20 Amps
Best Sellers Rank	45,245 in Automotive ( See Top 100 in Automotive ) 257 in Car Battery Charging Units
Box Contents	D250SE
Brand	CTEK
Brand Name	CTEK
Colour	Black
Compatible Devices	12V Batteries (WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO4)
Connector Types	Alligator Clips or Cigarette Lighter Adapter
Current Rating	20 Amps
Customer Reviews	4.2 out of 5 stars 173 Reviews
EU Spare Part Availability Duration	2 Years
Global Trade Identification Number	07340103403159
Input Voltage	12 Volts
Input voltage	12 Volts
Item Dimensions D x W x H	10.9D x 19.3W x 6.6H centimetres
Item Type Name	Battery Charger
Item Weight	700 Grams
Item weight	700 Grams
Manufacturer	CTEK
Manufacturer Part Number	40-315
Model Number	40-315
Number of Items	1
Number of Ports	2
Output Voltage	12 Volts
Output voltage	12 Volts
Product dimensions	10.9D x 19.3W x 6.6H centimetres
Unit Count	1 count

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2615.48 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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