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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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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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: 186600064

Details

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

⚡20A max charging power

🔋Supports 12V lead-acid & LiFePO4 batteries

☀️MPPT solar panel regulator

3385.27 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Charge smarter, roam farther — never get stranded again!

POWER UP ANYWHERE - Delivers a robust 20A charge to service batteries from 40–300Ah, keeping your rig ready for any adventure.
SAFE INTELLIGENT - Splashproof, reverse polarity and short-circuit protected with no risk to sensitive vehicle 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 input, 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, 12V battery charger designed for RVs, trucks, and overlanding vehicles. It supports both lead-acid and lithium (LiFePO4) batteries with selectable charge algorithms and features a solar MPPT regulator for optimized solar charging. Compatible with smart alternators and equipped with a temperature sensor, it ensures safe, efficient charging in all conditions while automatically managing dual batteries. Durable and protected against environmental hazards, it’s backed by a 2-year warranty.

Specifications

ASIN	B07X4YTP1P
Amperage	20 A
Best Sellers Rank	#1,282,504 in Automotive ( See Top 100 in Automotive ) #2,224 in Battery Chargers
Brand	CTEK
Built-In Media	D250SE
Color	Black
Compatible Devices	RV, Truck, Overlanding Vehicles, 12V Lithium Ion Batteries, Lead-Acid Batteries
Current Rating	20 A
Customer Reviews	4.3 4.3 out of 5 stars (172)
Global Trade Identification Number	07340103403159
Input Voltage	12 volts
Item Dimensions D x W x H	4.3"D x 7.6"W x 2.6"H
Item Type Name	Battery Charger
Item Weight	700 g
Manufacturer	CTEK
Mfr Part Number	40-315
Model Number	40-315
Number of Items	1
Number of Ports	2
Output Voltage	14.4 volts_of_direct_current
Specification Met	CE
Unit Count	1 count
Warranty Description	2 year manufacturer

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