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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⚡ Charge smarter, live powered — wherever your journey takes you!

SOLAR SMART - Maximizes solar energy with advanced MPPT technology for peak efficiency
POWER UP ANYWHERE - Delivers up to 20A to charge 12V lead-acid or lithium batteries on the go
TEMPERATURE TUNED - Built-in sensor adapts charging to temperature, extending battery life and performance
ALTERNATOR FRIENDLY - Seamlessly compatible with all smart alternators, ensuring smooth operation
DUAL BATTERY MASTERY - Automatically balances charge between service and starter batteries for uninterrupted power

The CTEKD250SE is a compact, 12V dual battery management system delivering up to 20A of automatic charging power. Featuring selectable charge algorithms for AGM and LiFePO4 batteries, MPPT solar regulation, smart alternator compatibility, and a built-in temperature sensor, it optimizes battery health and efficiency for service and starter batteries alike.

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Manufacturer	CTEK
Brand	CTEK
Model	CTEK D250SE (40-315), DUAL INPUT 20A CHARGER WITH SELECTABLE CHARGE VOLTAGES
Product Dimensions	19.3 x 10.92 x 6.6 cm; 700 g
Item model number	40-315
Exterior	Machined
Manufacturer Part Number	40-315
OEM Part Number	40-315
Item Weight	700 g

CTEKD250SE, 12V, 20A, Dual Battery Management System With Solar Control

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