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.
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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
4.9 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 1
Defective
Flavor Name: Sweet Potato, Size: 1 Pound (Pack of 1)
Product was disgustingly. Brown. Mushy. Will not be able to give to the dogs😡
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Reviewed in the United States on May 19, 2026
★★★★★ 5
The Best for My Furry Friend
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
As a pet owner who always seeks the best for my furry friend, I decided to try out the Scott Pet GRILLERZ Pig Ears 12CT, and I must say, they have exceeded my expectations.
**Quality and Flavor:**
The pig ears come in a pack of twelve, and each ear is substantial in size and weight, indicating a high-quality product. My dog was instantly attracted to the aroma and flavor. Unlike some other treats, these pig ears are roasted to perfection, ensuring a rich and savory taste that my dog can't get enough of.
**Health Benefits:**
One of the standout features of Scott Pet GRILLERZ Pig Ears is their natural composition. They are free from artificial preservatives, flavors, and colors, making them a healthy and safe option for my dog. Additionally, these treats help promote dental health by reducing plaque and tartar buildup as my dog chews on them.
**Longevity:**
These pig ears are long-lasting, providing my dog with hours of enjoyment. This is particularly beneficial for keeping him occupied and mentally stimulated, which is crucial for his overall well-being. I have found that one ear can keep my dog entertained for a significant amount of time, making it a cost-effective treat option.
**Packaging:**
The packaging is sturdy and resealable, ensuring the treats remain fresh between uses. This is a thoughtful touch that I appreciate, as it maintains the quality of the product over time.
**Price:**
Considering the quality and quantity of the pig ears, the price point is quite reasonable. It offers great value for money, especially when compared to other similar products on the market.
**Conclusion:**
Overall, the Scott Pet GRILLERZ Pig Ears 12CT are a fantastic choice for any dog owner looking to provide their pet with a delicious and healthy treat. The quality, flavor, and health benefits make it a top-notch product that I highly recommend. My dog loves them, and I am confident that your pet will too!
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Reviewed in the United States on July 11, 2024
★★★★★ 5
Healthy, natural treat my dogs actually love—no mess!
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1), Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
These pig ears are the perfect natural alternative to rawhide. All three of my dogs go crazy for them, and I feel good giving them a single-ingredient treat.
What I used them for:
Occasional chew treats for my three dogs.
Pros:
Single-ingredient, natural treat
Dogs love the taste and texture
Doesn’t stain or leave a mess despite slobber
Good size for medium to large dogs
Cons:
Can be a bit odorous out of the bag (minor)
Real experience:
I’ve given these to all three dogs multiple times, and each one enjoys them equally. Unlike some rawhide or flavored chews, these don’t leave stains or get mushy—cleanup is easy, which I really appreciate.
Comparison:
Much healthier and cleaner than rawhide chews or flavored alternatives, but still keeps dogs occupied for a similar amount of time.
Final verdict:
If you want a natural, low-mess chew for dogs who love to gnaw, these pig ears are a solid choice.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Nice Enough for the price!
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1), Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
Good price, not all are big though. But, they look like nice pigs ears and we got 13 instead of 12 (Oliver is eating one as I type so it’s not include in my pic, lol). I will order another bag fr his Christmas gift to share with his dog buddies.
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Reviewed in the United States on November 22, 2025
★★★★★ 4
Yummy pigs ear
Flavor Name: Pig Ears, Size: 12 Count (Pack of 1)
These are my dogs "special" treat. These range in size from large to small ears but my dog loves them all the same. Great for heavy chewers.
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Reviewed in the United States on March 6, 2026