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.Customs & duties included in the price

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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

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 batteries

☀️MPPT solar optimization

R401

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Charge smarter, roam farther — power your journey with CTEK D250SE!

SMART SOLAR SYNC - MPPT solar regulator maximizes your solar panel’s output—never miss a watt on the road.
POWER UP ANYWHERE - 20A fully automatic 5-step charging for lead-acid & lithium batteries keeps your rig ready for any adventure.
WEATHERPROOF SAFE - Splash and dustproof design with reverse polarity and short-circuit protection—charge confidently in any condition.
DUAL BATTERY MASTERY - Automatically balances charge between service and starter batteries, so you’re always powered up.
SMART ALTERNATOR FRIENDLY - Seamlessly works with all smart ECU-controlled alternators, ensuring perfect charge without draining your vehicle’s system.

The CTEK D250SE is a versatile 20A 12V battery charger designed for RVs, trucks, and overlanding vehicles. It supports 40–300Ah lead-acid and LiFePO4 lithium batteries with selectable charge algorithms and integrates solar MPPT technology for optimized solar charging. Featuring dual battery charging, smart alternator compatibility, and built-in temperature sensing, it ensures safe, efficient, and automatic battery maintenance in all conditions.

Specifications

ASIN	B07X4YTP1P
Amperage	20 Amps
Best Sellers Rank	34,076 in Automotive ( See Top 100 in Automotive ) 206 in Car Battery Charging Units
Box Contents	D250SE
Brand Name	CTEK
Colour	Black
Compatible Devices	RV, Truck, Overlanding Vehicles, 12V Lithium Ion Batteries, Lead-Acid Batteries
Connector Types	Alligator Clips or Cigarette Lighter Adapter
Current Rating	20 Amps
Customer Reviews	4.2 4.2 out of 5 stars (173)
Global Trade Identification Number	07340103403159
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
Manufacturer	CTEK
Manufacturer Part Number	40-315
Model Number	40-315
Number of Items	1
Number of Packs	1
Number of Ports	2
Output Voltage	12 Volts
Unit Count	1.0 count

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