The D250SE (CTEK Part No. 40-315) is a DC to DC fully automatic charger that’s designed to charge a Service Battery and is powered by the alternator/starter battery. With dual inputs the D250SE is also solar compatible (a standard solar controller is not necessary). The D250SE charger supplies up to 20A of power to any 12V lead-acid or lithium service battery from 40–300Ah. It also works if the starter battery and service battery are different chemistries, for example if the starter battery is lead/acid and the service battery is lithium. (Note: a service battery may also be called an auxiliary/aux battery, house battery, secondary battery, or backup battery.) This is a great charger for our V1 and V2 Lithium Deep Cycle Batteries.
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
CTEK D250SE 12V Smart Charger 20AThe D250SE (CTEK Part No. 40 315) is a DC to DC fully automatic charger thats designed to charge a Service Battery and is powered by the alternator starter battery. With dual inputs the D250SE is also solar compatible (a standard solar controller is not necessary). The D250SE charger supplies up to 20A of power to any 12V lead acid or lithium service battery from 40300Ah. It also works if the starter battery and service battery are different
Dual Inputs
The D250SE CTEK Charger has dual inputs and can charge the service battery from the alternator or a solar panel or both. The charger is designed to work with smart alternators and can still operate if the alternator is shut off but the vehicle has access to solar or wind power. So it can use power from the alternator, solar panel, wind power, or any DC power source can be used through the solar input port (within voltage spec). The D250SE can also charge the service battery from the solar input and the alternator in parallel using its built-in regulator to save fuel.
Optimum Charge
Continuous charging while the vehicle’s on the move means the batteries are fully charged in the shortest possible time. The built-in temperature sensor compensates for hot or cold conditions to prevent the battery from overheating or overcharging, so it always gets the optimum charge.
When the service battery being maintained is fully charged, the D250SE will automatically redirect overflow charge power to top-off the starter battery. The D250SE can maintain a stable output up to 20A to vehicles fitted with smart ECU controlled alternators.
LITHIUM
5-Step Program
- Accept*: Tests if the battery can accept charge. This step prevents that charging proceeds with a defect battery. (*Step 1 for lead/acid is Desulphation)
- Bulk: Charging with maximum current until approximately 90% battery capacity*. (80% capacity for lead/acid.)
- Absorption: Charging with declining current to maximize up to 95% battery capacity*. (100% capacity for lead/acid.)
- Float: Maintaining the battery voltage at maximum level by providing a constant voltage charge.
- Pulse: Maintaining the battery at 95–100% capacity. The charger monitors the battery voltage and gives a pulse when necessary to keep the battery fully charged.
Video about D250SE Charger
Specs
- CTEK PN: 40-315
- Input: 11.5–23V, 25A
- Output: Max 14.4/14.2/14.7V, 20A max
- Back-Current Drain*: Less than 1Ah/month
- Ambient Temperature: -4°F to +122°F (-20°C to +50°C)
- Battery Types: 12-Volt WET, EFB, Ca/Ca, MF, AGM, GEL, Lithium (LiFePO4, Li-Fe, Li-iron, LFP)
- Battery Capacity: 40–300Ah
- Insulation class: IP65 (splash and dust proof)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 1161 reviews
Sort
Product Reviews
★★★★★ 5
Amazing quality pixie dust at home
Color: Silver + 1 Refill Bottle, Color: Silver + 1 Refill Bottle
Amazing quality way better than Disney picxie dust. Kids absolutely loved it and it kept them sparkly all day . And the spray was perfect didn’t get everywhere. Little bit goes along way. Washed out easily after long day at disney
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 19, 2025
★★★★★ 5
love love loved it
I am now 55 years old and i love shinny stuff, so i decided I wanted glitter for my hair. I found this and am in love. It is very fine glitter and it just goes on my hair every so subtly. It catches the sun just right and i sparkle just like my personality. Not too much too look crazy just enough to look nice. Looks good on the arms and legs too for a night of dancing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 14, 2024
★★★★★ 5
Súper fácil de usar y de buena calidad
Buen producto fácil de usar live it I use for nails design
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
★★★★★ 4
Need base to use it
The bottles are well made and cute. There is plenty of glitter in them for whatever you need. HOWEVER- the glitter does not stick to your clothing or skin very well. I recommend some form of base to allow it to stick to you better. I applied lotion to my arms and neck, and that seemed to do the trick.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2024
★★★★★ 5
Great Glitter
Color: Purple + 1 Refill Bottle
It worked multiple times, no issue. love the glitter. i recommend using a hair spray first then spray the glitter, overral its reall pretty!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2024