Sir, I can't thank you enough for your video. I used the vehicle's USB charger as a trigger like you have and the cigarette lighter socket as a current limiting button.

@FrugalFactor

Жыл бұрын

Glad it helped

@camposvazquez

4 ай бұрын

​@@FrugalFactorMr FF.. I have a class b van that has a battery isolator to charge the lead acid battery.... It runs in conjunction with a cutoff switch.. when the switch is on..the coach has power and the coach battery gets charged... When the switch is off... It shuts down power to the coach and shuts off charging to the coach battery I traded for a renogy 20amp DC to DC charmer

If you used a switch for seat heater or wired windshield defroster that automatically shuts off when the ignition is turned off you won't accidentally drain the starter battery.

So the DC to DC charger wires run directly off the battery and not from the alternator?

@FrugalFactor

Жыл бұрын

Well, yes. Electrically its the same point of contact. The alternator is connected to, and charges the battery. You could connect to the battery or the alternator, its easier to connect to the battery due to its location.

Hello thanks for sharing with us. How this dc to DC charger is working for you.?

@FrugalFactor

Жыл бұрын

Excellent at both 20 and 40 Amps. It just works!

@mtbbuddys2545

Жыл бұрын

@Frugal Factor Thankyou so much One more question.. So the 2 red wires from the switch doesn't matter which one is connected to the positive wire on the van and the signal wire..

Do you have a link for that switch you used? And have you seen any of similar size with two switches? Would be nice to have a switch for the current limiter too.

@FrugalFactor

2 жыл бұрын

This is a link to the switches I purchased amzn.to/3lTZYdp I used these in several places in the build. I have not seen two switches that would mount in a cigarette lighter socket. That would be nice for several applications. I will keep my eyes our for such a switch.

Excellent information you've provided here. I have a class C motorhome. I recently swapped out the original LA batteries with lithium and now I need to install a DC to DC charger. Can I use the original cables from the starter battery to connect to the new charger?

@FrugalFactor

Жыл бұрын

Possibly, it depends on the wires Gauge, the Amperage, and the length. Use this calculator to find out circuitwizard.bluesea.com/

Hello there can you tell us what wire gage you used to that signal wire where it was connected? Thanks in advance 😊

@FrugalFactor

Жыл бұрын

12 AWG

Is there a reason you ran a switch instead of just finding a component in the battery compartment that is only on when the ignition is on? Did you just want the ability to manually turn it off and on?

@FrugalFactor

Жыл бұрын

Yes, I don't want it to run when the van is at low idle. I turn it on only when needed, and only when on the highway. No need to have a load on the alternator when the batteries state of charge is at 100%

Hello and thanks for uploading. I have a couple of things I'd like to confirm regarding some of the connections made with the D+ wire and the limiting wire. Does is matter which of the 2 red wires coming from the switch connect to the existing (yellow?) wire and to the signal wire(s)? Also, it looks like you twisted the 2 signal wires together when the connection was made to the red switch wire? Much appreciated!

@FrugalFactor

Жыл бұрын

No, either of the two red wire will work. There is no polarity. When the switch is closed those two wire connect completing the circuit, sending +12Volts to the DC to DC charger.

@tylermackenzie6098

Жыл бұрын

@@FrugalFactor thank you! And did you simply splice and twist the D+ line and the LC line together before connecting into the 2-conductor Wago? (when connecting to the switch, that is)

@FrugalFactor

Жыл бұрын

@@tylermackenzie6098 Yes, and I used another Wago connector in the garage area. So, if I want the full current charging with 40 Amps I can simply disconnect the LC line from the Wago connector in the garage area. I did this one day on our 10,945 mile trip just to fully test out the system.

@tylermackenzie6098

Жыл бұрын

@@FrugalFactor beautiful, many thanks

Hi, may i use the battery while it is charging with that charger?

@FrugalFactor

Жыл бұрын

Yes

Would you have the link for the toggle switch itself?

@FrugalFactor

Жыл бұрын

Link to Switch amzn.to/3g68PJf

@josefandino4090

Жыл бұрын

@@FrugalFactor sorry about all the questions but I keep getting more in my head watching your videos multiple times haha. So talking about fuses. Will I need a inline fuse between the dc to dc charger to the starter battery? Knowing that I will be plugging directly to the 70amp fuse from the starter battery of the car? Or will that 70amp fuse be enough protection? I do believe that I need a fuse for the output side of the dc to dc charger to the house batteries if I’m not mistaken

Thanks for making this video. I do have a concern however. Running the wire inside the pex pipe is a great way to protect it, but there is nowhere for the heat generated by the conductor itself to escape. If the pipe holds the heat in and it gets hot enough, it could melt the outer jacket on the conductor. It is nice how you talk nice and slowly so a person can absorb what you are saying.

@FrugalFactor

Жыл бұрын

If the conductor generates that much heat you have selected the wrong gauge of wire, and/or not protected the wire with the correct fuse or circuit breaker. Thank you for the comment.

So the correct dip switch setting for lithium batteries is the one shown in the overlay? Switch 1 & 5 off? Other videos show the original setting (all on except 5). Are you sure on this?

@FrugalFactor

Жыл бұрын

After emailing Renogy to be sure - Yes. Also, if you follow the manual those are the settings for a type 2 lithium battery, providing 14.4 volts. You could also check with your battery manufacturer to ensure that charging at 14.4 volts is best.