CTEK DS DUAL D.C Charger – DC/DC solution for operational charging The DS DUAL charger obtains its energy from DC sources such as alternators. The CTEK DS Dual DC-DC charger will charge, condition and maintain your dual battery system, with the ability to charge from both your alternator while. Why won’t my CTEK DS Dual Charge from Solar Panels? The CTEK D DC-DC Charger will also charge from solar panels while it is getting input from.

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If the ground of your chassis is good you would be just fine to run the ground there instead of back to the battery. If the trailer has a solar panel or other charging system on it the SmartPass would be best on the trailer for sure.

Keeps You Informed Easy-to-read indicator lights keep you informed of SmartPass charging s250s and alert you to any problems that may develop. The input voltage range is 10 volts DC up to 22 volts DC.

Cteek will separate the service batteries from equipment that they operate during the charging process, gives priority to service batteries to charge them faster, helps protect the electronic equipment, and it charges the service batteries much more efficiently. Your comment has been submitted successfully.

CTEK DS Dual Input Battery Charger | eBay

Either way, it sounds like the solar panel was connected directly to your batteries. The LED lights each need to be grounded to the frame of your trailer; You mentioned the use of solar panels so what this set up will do is select the best input from Higher Output Rating The SmartPass can provide a higher amperage charge rate which it would receive from an alternator with higher output to handle more demanding service batteries and banks of batteries.

Will work on trucks, campers, RVs, 4-wheel drives, boats and tractors.


Customers compare CTEK to these similar products. This combination will allow Easy-to-read indicator lights keep you informed of SmartPass charging actions and alert you to any problems that may develop.

It takes advantage of higher-output alternators to charge larger banks of service batteries, and it protects both batteries and electronics. Things to be Aware of When Charging a Battery from an Alternator The biggest thing to be aware of is that your alternator will more or less provide just a maintenance charge for your batteries. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.

They were wondering if you are using both the alternator and solar panels to power the charging system? The SmartPass can provide a higher amperage charge rate which it would receive from an alternator with higher output to handle more demanding service batteries and banks of batteries.

Returns Policy Satisfaction Guarantee Need to return an item? Critical and non-critical electrical devices are supported and connected separately.

CTEK SmartPass Energy Management Unit for CTEK D250S DUAL Battery Charger

Can a Solar Panel be Connected Directly to 6V Batteries I’m guessing that your two 6V batteries are either wired in series or in parallel see attached photo.

Contact Email Please enter a valid email address. Personalized service for life. The SmartPass warns you if the charge on the service battery gets low. Let us know if anything is missing or if you have any questions. It will take advantage of the higher output alternators to charge larger banks of service batteries and it vtek both batteries and the electronics. Product Experts Available Now! Again, the application on this is for volt starter batteries, service batteries and banks of service batteries.

This system monitors the battery temperature and protects the batteries from overheating. The DS and the SmartPass are receiving power from an alternator and a solar panel ctel charging a service battery and a starter battery.


This will protect your main starting battery from auxilary drain and regulate current for multi-battery systems. Does come with two metal connectors that you can just open them up just like that and connect your to the other chargers and four extra thumb screws.

Wiring a Trailer With Dual Batteries and Solar Charger Let’s try and take this one at a time to make things easier; to start with the black wire from the 7-way plug the 12V should be run to the pair of 12V batteries you already have in the battery box.

Otherwise it could be mounted on the truck. If the service battery charge gets low, the SmartPass will cut power to the non-critical equipment first.


With a SmartPass charger, electrical devices are separated from the service dtek, allowing more power to go to charging the service battery so that it can be charged faster. This kit will give complete instructions, various terminals and connectors, 15 feet of wire and a If you want to actually charge the battery of the trailer from a depleted state you would need heavier gauge wire than 10 gauge.

The total height is going to be right at two-and-a-half inches tall. This will warn you of a low charge on the service battery so it helps make sure you don’t lose power to important electronics like navigation equipment, lights, or radio. Your order is automatically routed to get out of our warehouse and to your door as quickly as possible.

If you don’t tcek anything drawing power it may very slowly charge ctem batteries but the best way to keep your batteries charged is by using a charger like part CTEK when you have access to AC power.