Connecting a 12v to 24v Converter to a Bluetti EB3A. How efficient is it? Is it worth it?
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- Опубліковано 15 жов 2024
- In a separate video I showed how you can create a cable that will connect the Bluetti EB3A directing to a 12v 100ah Lifepo4 Battery.
This time I'm using a 12v to 24v Buck Converter to up the charge rate! I might get double the charging power, but what about efficiency? Is there anything else to be concerned about? Let's find out!
List of the Items in this Video:
BLUETTI Portable Power Station EB3A, 268Wh LiFePO4 Battery Backup
Amazon: amzn.to/3LuK3OB
Lifepo4 12v 100Ah SoK Battery w/ built in heater
www.us.sokbatt...
You can also check on Amazon. I don't believe this one has internal heaters:
amzn.to/3m9bvZy
DC 12V Step Up to 24V 10A Boost Converter 240W DC Voltage Regulator Power Converter Waterproof Module Transformer for Golf Cart Club
amzn.to/44lt2zk
GINTOOYUN 2 Pcs DC7909 Power Pigtails Cable, 12V DC 8mm Male Plug to Bare Wire Open End Power Wire Supply Repair Cable, 16AWG DC 7.9 x 5.5mm Barrel Connector Pigtail for Solar Cell, Laptop Power(0.3m)
amzn.to/3JkHyiv
elechawk 5 Pairs XT60 Plug Connector Female and Male with 14AWG Silicon Wire for RC Lipo Battery Cable Drone Car Boat
amzn.to/3L2k7f0
BNTECHGO 16 Gauge Silicone Wire Spool Red 25ft And Black 25ft 2 Separate Wires Flexible 16 AWG Stranded Copper Wire
amzn.to/3IVM0mj
Klein Tools 3005CR Wire Crimper Tool, Ratcheting Insulated Terminal Crimper for 10 to 22 AWG Wire
amzn.to/3kM1y4k
knoweasy Automatic Wire Stripper and Cutter
amzn.to/3R18xB5
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Your tutorial videos pick up where others leave off, which is greatly appreciated!
Glad you like them and thanks for the comment!
Your sincerity and perseverance with these videos/projects is appreciated. Thanks.
So nice of you. I try to keep things consistent. My thought is always "someone is watching this content for the first time". Thanks for the comment.
@@OffGridBasement Welcome.
Having it and not needing a buck converter at that voltage range is by far better than not having and then needing it.
As for now, I'll keep directly connecting my power sources into my power Stations, but will purchase a couple of these converters and build the cable interfaces and keep them handy. Thanks for the video.
You're welcome. Thanks for the comment.
I just made this conversion and took it out on a trip last week. My converter is a 12vdc to 24vdc at 8 amps (EB3A has a maximum of 8.5 amp input).
It worked like a charm and kept the fridge working between fishing spots and when we returned to our night spot, the EB3A was up to 100%.
Thanks for sharing and for the comment!
Thanks…. I upsized the “Boost” converter to a 20a unit (12vdc in -> 24vdc out) instead of a 10a rated device.
Using a 12v / 100ah battery to charge the EB3a, it was much cooler. Though it was still not terribly hot as your example, it still got up to approx 145 def F.
I simply added a 12vdc high quality/high CFM fan with a thermistor type “on/off” switch.
The heat sink of the boost converter now runs at 105 degrees F max.
Great concept,.thanks!
Thanks for sharing and the comment!
Hello, what 20amp booster did you use? I'm using an old wincharger 12 volt winmill to augment my 24volt battery bank. I've a 1500w 24v inverter, was hoping to set up a seperate charge controller, perhaps with heat element for the shun load. Thanks
I think you are on the right track highlighting efficiency in your video.
There are many show and tellers out there who highlight a product like a battery charger. But they never say how much power it takes out of the wall or out of a small stand by generator vs. how much goes into the battery. Also, many battery chargers have a low power factor. Since the small gas powered inverter generators put out volt-amps many will not successfully run the battery chargers which the consumer might assume it would. If you have a small 1000/800 watt generator and try to use an 800 watt of output battery charger the generator will soon turn off on you.
Thanks for the information. I do need to show the conversion efficiency of all the chargers I've reviewed. I think it might show a good comparison. Thanks for the comment.
Great experiment. I was about to order 12v to 24v inverter to speed up charging. Now I have doubts because of the heat it produces. It can easily cause the fire without proper cooling. Thank you for that!
You're welcome! I've heard you can get a larger amperage boost converter and it won't produce as much heat. I haven't tried it out myself. Thanks for the comment.
I put together a 48v to 24v buck converter (one of those finned aluminum block kind from Amazon that looks like what you used in this video) so I can use a full size solar panel to charge my EB3A. It will take just under 200W this way. I have used several of these now for various purposes and they work surprisingly well.
Thanks for the info. Does the buck converter get hot to the touch? I was so surprised how hot the boost converter got in the test.
@@OffGridBasement not really. The one I bought is a 720W capable unit.
I also have a 48v to 12v 360W buck converter hooked to my 50kWh house battery bank to run a few things and it doesn't even get warm to the touch. I have another much lower wattage version of it powering a voltage sensing relay and it is always cool to the touch. I am wondering if the boost versions get hotter than the buck versions?
@@chevrofreak I think you may be on to something. My 24v to 12v buck converter never gets warm.
Nice test.
I have one of these (convertors) and for me it depends what you are using the EB3A for as you could be pulling 300w which will outpace the incoming charge, so it depends how long you need to sustain the 300w for (or whatever your use case would be). If you are looking at say a fridge that spikes and then falls having a 100w input charge may be enough to let the EB3A recover.
It does get hot but I'm not using things that much as it is as an emergency thing when the power goes out.
I was pretty concerned about the heat. I'm glad to hear you are taking measures to keep it in check. Thanks for the information.
Wires seem a bit thin for 18 amps on the battery side of the buck converter. Did they get warm/hot?
Hey, that boost converter is only rated for 10 amps on the input side- no wonder it got hot!
The unit did get hot. This was a demonstration. I would probably use a 20A or 30A if it was a permanent solution. Thanks for the input and comment!
Awesome video, this is real world and use. You hit the nail on the head with this demo, thank you for producing and sharing
I'm glad you got something out of the video and thank you so much for the donation!
You could take a Peltier module and affix it to the buck converter, then use it to power a cpu fan for cooling the converter. I wonder how much that would be effective. I think the EB3A’s dc input may be capped around that 200w level, so I don’t think it would increase the rate of charge. It would, however, cool down the converter.
Thanks for the information and the comment.
Have you tried running your 1500 watt pure sine inverter off your 100amp hour SOK battery to charge the EB3A? What type of efficiency loss would be presented? Would it lower the heat risk from doing the conversion from 12 to 24 volts? If the goal is to quickly recharge the EB3A in the event of an off grid situation and no sun, would this be an easier way?
I haven't tried that. It's a good question to see if just plugging it into AC is more efficient than using a boost converter. It would definitely be the fastest way. Thanks for the comment.
@@OffGridBasement I once connected the eb3a to my set up with a sealed battery and an inverter of 1k watts. The battery charging from solar at the same time. It took me almost 3 hrs from 10%. Not lighting fast, but I think it was decent time of charging from (never let my devices to go to empty). It was an ac charging from the inverter. Why go to all the trouble if I have a set up or two just in case I need it. With good sunshine it should charge more than once in case of a grid down. I am a learning gal, not an expert. I got a pecron e600lfp, and I just charged it from. a lithium 100a connected the 12v socket. It took almost 3 hrs from 60% with 70-80 watts. As long as I can keep my battery from dying, I am set. It is very cloudy and rainy today, but I still got some solar into the battery. Now my question is, it would be more efficient with those xt60 and all the trouble of doing the wiring. I am still in the learning process, and I do not have all the tools. Do not want to buy since I probably will not be using them frequently. Thanks for the teaching!
Wouldn’t it be better just to get a 24v lifepo, then it wouldn’t lose that much efficiency?
Yes. Using a 24v battery would be the best option. Thanks for the comment.
Rule of thumb with electrical devices; IF you can't keep your hand on it, something is wrong, or it needs supplemental cooling. Also, regarding a rule of thumb for batteries, they pretty much like the same temperatures that we do.
Thank you for the information and the comment.
IVE DONE THIS THE CONVERTERS WORK VERY WELL I USED THE 12 VOLT TEP UP TO 24 VOLT AND I GOT ABOUT 198 WATTS THEN I TRIED A 12 VOLT STEP UP TO 36 VOLT AND I GET 351 WATTS ONE SOME OF MY POWER STATIONS AND 520 WATTS ON THE BIGGER POWER STATIONS AND AS I STATED THEY DO WORK WELL BUT THERE IS AN ISSUE OF HEAT THE CONVERTERS GET VERY HOT SO I ADDRED ONE 12 VOLT FAN TO THE 12 TO 24 CONVERTER THAT WORKED VERY WELL THEN I ADDED TWO 12 VOLT FANS TO THE 12 TO 36 VOLT CONVERTER AND THAT WORKED VERY WELL SO NOW THAT THE HEAT ISSUE IS SOLVED IM GONNA KEEP USING THESE CONVERTERS TO CHARGE MY STATIONS ONE MORE THING IF YOU DONT WANT THE WIRES TO GET HOT JUST USE THICKER LARGER CABLES PROBLEM SOLVED. GOOD LUCK PEOPLE
Thank you for the great information and comment!
What if you put two batteries in series?
Victron have a dc-dc converter (Orion 12-24v) that has an in-built fan etc for heat. Would be good to see a demo of the efficiency of that
Yes. I'm wanting to get the smart version to transfer power between my banks! Thanks!
Hey! Im from Phillipines. How about no converter? How many hours it will charge? Like. Direct battery to eb3a? Is it safe not to use converter?? Just only direct 12 volts 100ah to eb3a??? Godbless sir
i willbe bying a 24V 50ah or 100 ah lifepo4 battery i think it will be better to charge the EB3A my Ac180 and soon my AC70 .
I think direct wiring is the way to go.
You just have to be aware of the lower charging rate and manage your usage accordingly... Or use 2 batteries.
True. Even though the EB3A has pass-thru charging, you are still limited to the battery capacity of the unit.
So you figured out a way to heat your camper van. Good work.
In a roundabout way you are right. 👍. Thanks for the comment.
I like this video. Very helpful. Do you have a video on how to connect a 200 watt solar panel to the 12.8 volt lithium iron phosphate battery, and then to the Bluetti EB3A? Would love to see that also.
Not yet. I do want to show a few ways of charging everything with a 180w solar panel. Thanks for the comment.
This is a bit more expensive but also includes a lot more features plus a cooling fan.
Victron Orion 12/24-20 DC-DC Converter IP20
Yes. It's truly a great product for the price. Thanks for the comment!
But it defeats the purpose of this which is Keep It Simple.
Question. I have an EB3A. Instructions say 8.5A max input. If I put more than that in, does the EB3A automatically regulate it as to not cause damage? Good video.
Yes. It will max out at 8.5 amps and hold there. Just make sure not to go over the voltage maximum.
I would check to see if the DC from the boost converter is steady or if it's pulsing.
If it's pulsing you should put a large capacitor on the output of the boost converter.
I didn't know some boost converters pulsed. Thanks for the info!
why do you not use a USB fan to cool that converter?
Can you series connect a pair of 12v batteries to check the efficiency of charging directly with a 24 volt battery? Two 7.5 AH 12 volt SLA batteries would probably be enough to do the test. I've seen converters that look like yours that are only rated for 3 amps. What is yours rated at. It may be overworked.
The boost converter I was using is rated at 10 amps. I would think using 2 12v batteries in series would get close to 94% efficiency, but it's worth checking out. Thanks for the comment.
I have a question:
Since the efficiency is lower using thr converter, then the battery must be drained a lot more the when using buck converter. Can you run this test and measure the energy left in the battery after both tests. I assume that the use of the converter will lower the battery by a noticeable amount.
The buck efficiency is supposedly rated at 97%. It would be interesting to see the difference for each one. Thanks for the comment and the idea.
Presumably, the purpose of this is to expand the capacity of your power station. Compared to the price of power station expansion batteries, an extra 10% loss in conversion isn't that bad. Additionally, you can use this battery for other things or charge it independently while still using the power station.
Thanks for the info and the comment.
Nice video. Curious if you're able to do a 24v to 48v using a buck converter.
Thanks for the suggestion and the comment.
Great info. One question on the straight 12v -> EB3A - is there a voltage level where the Blueetti will stop pulling from the battery? For example when the battery gets low does the EB3A stop charging? I would think so but I'm not finding any info. That would limit how much of the 50AH battery is used.
I would think the EB3A would stop pulling from the external battery as soon as the battery got below 12v. I've got another sub who said he completely killed his external battery overnight by leaving it plugged into the EB3A. I'll need to test it out myself.
I bought my EB3A, just to have a good charge controller. I tried to use AC from a battery to the 110 plug in for charging, with 3 different batteries (not enough amps?) and it did not work, 12 volt works great.
That's a good idea for the unit. Odd that the 110v wouldn't work. Glad to see the 12v work for you. Thanks for the comment.
So when charging like this from a 12V battery we dont really need equiment other than the cables to connect the battery and the unit?? And a boost converter if desired??
That is good to know.
Have you tried charging just one 12V battery with just a solar panel or two? What would be the minimal way to do that? I saw someone using an mppt controller for about $40 with SAE connectors, not sure if that is good enough. Not sure if and when I will ever have a "real" set-up, so I wondered about the minimal safe way to charge one 12V battery.
That is correct. You can use just a 12v battery connected to the EB3A and it will charge. A charge controller with SAE connection would be just fine and it would be a waterproof connection.
I plan on doing a demonstration showing connecting a solar panel to the battery that's charging the EB3A. Thanks for the comment.
With today's 2nd gen ecoflow they use a simple XT60i plug which charges at 185wh with no stepup.
Thanks for the comment and info.
I recently purchased a 15 amp version of the same booster to fast charge my Bluetti EB3A while driving in my Prius but I have not tried it yet. I read using a higher amp 12v-24v Boost convertor would produce less heat. Would you happen to know if that is true? I'm tempted to return it without trying it because I live in Florida and would not want the extra heat in my car. Thoughts...comments?
I believe that would be correct. You wouldn't be using the full capacity of the unit so it wouldn't get as hot. It still might get warm though. It really depends on how much heat you can handle. Sorry I can give you a better answer.
I was about to buy one, I'm glad I saw this video
Glad you got something out of it. Thanks for the comment.
Hello and good to know!!! Wondering what percent of the battery was used to charge the Eb3a??
Many thanks!!
I haven't tested it, but with conversion loss I would think it took about 25% of the 100ah battery to fully charge the EB3A. Hope that helps. Thanks for the comment.
Looks like the EB3A’s DC charge controller has about an 8 amp limit. It also has a 200 watt charge limit. That’s your efficiency loss and source of heat.
Thanks for the info and the comment.
Question could you connect a 12v to 24v converter to a 140watt usb-c cable to charge an Anker Solix C300 through the 140watt charging port using an expandable battery.
As long as it can handle 24v, then yes.
Hey I have an rv lithium charge controller.So on shore power kicks out for li 12v battery charging.
My question is: Will my 12v converter adapt to a 24v bat bank using your step up buck thing to charge 24v bat bank?
I don't think so. You need more than 24v to charge a 24v battery. You need more like 26v. I don't think the converter will go that high.
LOVE this! Thanks for sharing.
You are so welcome! Thanks for the comment.
Thanks for doing the experiment.
No problem! Thanks for the comment.
Hello, Could you confirme me that the converter used is the Setup 12v>24v 10A model ? Thank You
Yes. It's a 10a version. There is an Amazon link in the description. Thanks for the comment.
I’m going to try using a boost 24v to 48v it’s 20amps on my Anker F3800. My question for heat I have a 24v computer fan, should that be placed pointing UP to help remove the heat ? Or down directly on the top heat sinks blowing down ?
I would point it up to suck the heat from the unit, but I think either way would work just fine.
I'm out at a small fan out of a computer to my buck converter and it stays nice and cool
That's a great idea! Thanks for the comment.
Boost converter. You're "boosting" the voltage to 24v. How long would it have taken to Google that?
I know. Stupid, right?
I purchased a 5000w inverter not realizing its a 24 volt inverter. Is there still some way i can use it in my 12 volt semi truck?
Ouch. You can still use it if you get a boost converter, but I HIGHLY don't recommend doing that. I would send the inverter back and get a 12v. Sorry!
Say your booster/converter is only 10 amps input. How's the battery gonna know to only put out 10 amps. That battery should b able to put out around 100 amps or so
It's limited by the EB3A @ 8.5 amps.
@@OffGridBasement thank you much
Great vids thnks, ive been learning alot🤘🏼, also i hope not to offend you but u look like tucker carlson😂✌🏼
No offense taken, but that's a bummer! Thanks for the comment.
I have to admit I thought the same thing, especially in the cheeks.
Hi i love your videos. Can i conect any appliance while i am charging the eb3a with the battery?
Yes. Anything the EB3A can accept, you can still use.
Hi
I am a newbie, but interested in this type of connection. If you connect battery to solar station without boost converter, what makes current flow from battery to solar? If I have solar DC input 30v and 10Amp if I connect 12v and 100amp battery will current flow at 8Amp and at what voltage? Does current flow depend on solar station input or from battery itself?
The battery only supplies 12.8v nominal... in other words...on average. The solar station can accept between 12v and 28v and a maximum of 8 amps. So the battery will give 12.8v @ 8amps to the power station. If the battery is 24v then the power station would accept 25.6v nominal @ 8amps. I hope that answers your question.
@@OffGridBasement
Thanks,
My understanding is that the EB3 limits amperage for solar charging. 18 amps seems to exceed the capacity of the unit. Could the built in limiting be the source of the heat?
I figured the heat was coming from the actual conversation process in the unit. My mindset was if I bought a converter with more amperage capability then there wouldn't be as much heat. Thanks for the comment.
18A was at the input of the converter (battery side) 18A * 12V = 216Watts. At output of the converter, the Bluetti was showing about 200W of power draw at 24Volts. 200W / 24V = 8.34 Amps on the Bluetti side....well within its limit. More volts require less current to produce the same amount of watts (power). I've rounded a few things off and used 12v for simplicity, but I hope that helps.
I want to get a $50 battery box put a lithium battery in that then use the bluetti car charging cable to charge the Eb3a. I wonder what the efficacy loss would be compared to the direct charge from a battery.
I'm sure you would probably still get in the 90+% range.
What's the app you used to test all this? Does that work with the bluetti app somehow? Where's that information being drawn from?
The SoK 12v battery has a smart BMS. That's where I got the battery measurements. Hope that helps. Thanks for the comment.
Nicely done, however I think your efficiency calculation is off because the Bluetti only allows up to 200 watts input on the DC side. I have this setup and an EB3A, also a Renogy Phoenix 1000 and can get 243 watts using the convertor on the Renogy because it allows 400 watts DC input.
BTW, a Buck convertor takes voltage down, so 24 VDC to 12 VDC.
Keep up the great ideas, I love your channel and all the trial and error you put into it.
Thanks for the info. I realized I should've been saying "boost", not "buck". Bummer on my part. Thanks for the comment.
Boost converter. Good demo.
I realized that a bit too late... Thanks for the comment!
If you use a lower current Buck converter like 3A or 6A instead of the 10A you will loose some input power but it will run allot cooler(safer).
Thanks for the info and the comment.
All parts arrived today from China. Curious to put them together. My idea is to use battery clamps on one end to use it in the garden as a booster with a led acid battery.
That should work well for you. Good luck and thanks for the comment.
@@OffGridBasement finished the project and uploaded video ☺️ it charges with 148 watt since lead acid are weaker. But still totally fine for me.
What if you put a 500 watt power inverter on the 100ah battery and then plug an AC cable into the bluetti if it would charge at the full rate?
If you don't set the Bluetti up to turbo charge I think that would work. Thanks for the comment.
I tried doing that my eb3a and now my power station is not working anymore. I think that power station is defective because I done it to my ecoflow River 2 so far it's working fine. I think that the EB 3A has a problem with the reset button.
That's not good. I do know for a fact that it does work. Hope you get it worked out and thanks for the comment.
"Boost" converter. Not "Buck" converter. Seems to work well.
Yes! Buck is step down and Boost is step up. I don't know what my problem was. Thanks for the correction and the comment.
@@OffGridBasementwe know u meant, youre the one making these videos not these random people always putting there two-sense in it ✌🏼
Wow didn’t know of up n down ,boost and buck.
I think I need one of each.Using12v rv charge controller to two 12v bats wired 24v to have more power from mttp panel charging system.
Is that doable?Whats the max voltage for those two units!
I read a comment saying he wouldn’t trust one over 5v? Step down I think was he talkin about.
Hopefully someone can help. Can you just connect the battery to the Delta 2, using a battery and the xt60i. A DC to DC converter isn't really necessary? Especially if the Delta accepts DC and limits the consumption at 500w. Just really trying to understand if or why the DC to DC is needed or not.
The DC to DC isn't needed if the Delta can accept a voltage as low as 12v. If it needs a higher voltage to work then you will need a boost converter. I hope this helps!
@@OffGridBasement I went without the converter and just created connectors so I could use the Delta 2 cord. As a result I now have more input power. I'm going to convert to a 24 volt setup to produce more power. Appreciate videos like these.
You are limited by the input specification, 200watts max. That doesn't change. You got 1/2 the charge time over the 12 v battery. The efficiency loss you are dealing with is in the boost converter. If you matched the boost controller to the input spec's of the bluetti 200watts, then the efficiency loss would be nill. But you ordered a 240 volt converter, so yea efficiency loss occured-heat buildup, however it still charged you bluetti in half the time.
Thanks for the info and the comment.
I ran across a 19v convertor. Seems like you would get less heat and more efficiency with that.
I believe the heat comes from the amperage, not the voltage. Thanks for the info and the comment.
I have been messing around with chaining 2 EB3A's together it works but you lose energy via the inverter ...wonder what a 24 volt battery would be like as a source of power?
My guess is the efficiency would be the same as the 12v. About 94%
@@OffGridBasement no hot wires hopefully
How many watts was the buck converter. And does it matter
I sized it to what the Bluetti can handle. The max on the Bluetti is 8.5A so I picked the 10A converter. Hope this helps. Thanks for the comment.
New to this- Do you have any way to measure the charge left in the 12v battery?
The best way to measure the charge left is with a shunt. You can measure the voltage of the battery if you need a very basic idea. You just need to make use it's not under any load.
What about using a BLUETTI P090D To DC7909 External Battery Connection cable with a b230 battery with the EB3A???
The physical connections would seem to work. It depends on the voltage the battery supplies. If it's between 12v and 28v then I say go for it. Does the battery need to recognize the unit in order to work?
@@OffGridBasement actually I did some research and it seems like the b230 battery delivers 51.2 volts. I didn't realize the ac200 max system was a 48 volt system , I thought it was a 24 volt one, but you can still use the b230 battery with the cigarette lighter type cable, but will be limited to 100 watts unless you do the buck converter trick.
Noob here. Why doesn’t the 24v side need different wiring to handle the higher voltage?
Because it reduces the amperage. The amperage is what heats up the wires. Hope that helps!
What size in AWG Wire you are using?
I believe it is 10awg wire. That would be plenty for the amperage used.
@@OffGridBasement Another question, it needs a reverse polarity protection?
There probably is no protection in the EB3A for that. You need to make sure your wiring is correct before attempting to plug in.
I wonder what's inside it. I really don't know if anyone has opened it because I don't know the keywords to search
I would try "Bluetti EB3A teardown". I don't know if you will find anything. Thanks for the comment.
Does the buck converter have a power draw at idle?
My 24 volt to 12 volt "Buck" converter uses about 50 milliamps at idle.
No. Nothing that I could measure.
What if you connect to bluetti main battery .
That is what the video is about. I'm not sure what you're asking.
You can mount the 12 to 24-volt inverter on the opposite side of the eb3a the cooling fan of the eb3a will keep it cooler.
Just make sure you don't block the airflow from the unit. Thanks for the comment and info.
Inverter are not efficient and beat the purpose of keeping it simple. 100W will run a camping fridge and charge phones while you sleep and keep the power station topped off.
I don't use a buck converter on my ecoflow River 2
I'm sure it still works just fine. Thanks for the comment.
Good Test... 👍
Thanks!
👍
a small fan on top of the buck converter would cool it
Yes. A small desktop computer fan would do the trick. Thanks for the comment.
Thats was surprising how hot your buck converter got. If you dont have a fan, maybe at least put it on a silicone pad. I guess efficiency versus shorter charging time depends on your immediate need??
Yes it does. I think it's a good idea in case of emergency. I wouldn't want to use it as a permanent solution.
The Bluetti is only letting in 24v at 8 amps brother
Thanks. My calculations were a bit off!
Isn't that a "BOOST" converter? I thought a "BUCK" converter reduced voltage and a "BOOST" converter increased voltage.
That being said, using a BOOST converter in a car while driving, with it wired directly to the battery (and fused and cooled), is a quicker way of charging these portable power stations through the solar inputs. BOOST converters can be purchased to at least 48 volts and can mimic solar input.
You are definitely correct. I mistakenly said "BUCK" converter in the video! That's a great idea about the use of a car battery. Thanks for the info and the comment.
Buck converters reduce the voltage.
Boost converters increase the voltage.
Thank you. I know I used the wrong verbiage in the video.
You also need a separate way to charge the external battery.
I have an additional video on that.
ua-cam.com/video/ppujPRMS4YA/v-deo.html
...or buy 24v batteries?
That would also work... Probably the most efficient as well! Thanks for the comment.
The item is waterproof you can cool it down in a glass with a couple of Ice cubes
I like the idea, but I don't know if I would actually try that! Thanks for the comment.
Could I just use a car battery
Definitely. Make sure to not have the car running. You could always use the cigarette lighter adapter if the car is running. That is also DC charging. Thanks for the comment.
get the orion brand
converter way more efficient its more expensive but a lot better.
True. Victron is the way to go. Thanks for the comment.
The eb3a is only capable for 200 watt max input. thats why your not seeing the 230 watts.
I was going by what the EB3A can accept. The solar port will max out at 28v @ 8.5A. That equals 238w.
@@OffGridBasement But the max input watts is 200 wmax, regardless.
Also, a buck converter is a step down converter. You are using a step up converter, or boost converter.
If you add a 12v fan connected to the battery then using a buck converter just to cool it down a bit then it is even more ineffecient...not worth the money nor the risk.
You have a very good point. Thanks for the comment.
The best way would be wire 2 batteries in series to get 24 vdc.
This is true. That would be the most efficient way. Thank.
instead of that converter thing why don't you just use 2x 12 v batteries in series so you have 24 v then you shouldn't be loosing anything
I did this because it's a less expensive option. Thanks for the comment.
@@OffGridBasement Two 12V 50AH batteries
connected in series will be cheaper and more efficient or am I wrong?
That's correct.
If there's energy lost as heat using the boost converter than without, then that tells me immediately there's less power reaching the EB3A. No measurement needed.
Thanks for the comment.
Just buy a DC to AC 500w inverter and plug the eb3a in the inverter . Get a pure sine wave. 100% efficient ! Under 100 bucks ! No splicing, or wiring ! Simple !
It would be easier, but unfortunately it wouldn't be 100% efficient. You would be going from DC to AC then back to DC to charge the EB3A.
I did this with my Bluetti AC180P, what it did was attempt to draw 850W and the 500W inverter shut off because it couldn’t supply 850W.
but EB3A takes a max of 200 watt solar charge
I was going by what the EB3A can accept. The solar port will max out at 28v @ 8.5A. That equals 238w.
charge it with your 18 v ryobi batteries.
That would a good direct source. Wish I had bigger Ryobi batteries... Thanks for the comment.
It is a BOOST converter not buck. 12 v to 24 v is a. boost converter.
Yes. I misspoke in the video.
i tried that it work But it Got so HOT i turn it off and sent it Back to Amazon
Yes. I was surprised by the amount of heat it produced.
Important to note that if you accidentally connect the converter up the wrong way you fry it irreversibly and have to buy a new one. So quadrouple check before connecting.
He made it pretty foolproof.
Thanks for the info and the comment.
Think i just did that
Not worth it. There's also heat generated inside the Bluetti as it steps it back down 13V. Also consider that you are putting more stress on your Bluetti and SOK batteries and BMSs. I know LiFePO4 is supposed to be able to handle it better but charging at ~0.7C isn't something I'd do on a regular basis unless I had a reason.
Good info. Didn't think about inside the Bluetti. Thanks for the comment.
bluetti shouldnt be stepping the voltage down, the boost converter is putting out 24v and is within the 12-28v range, and charging from ac on standard is using 268watts, but doing DC charging it won't go over 200watts so there will be less heat than using ac charging, all I'm saying everything is fine, also try another test with a 20amp DC converter to see if it gets less hot.
If you are charging in a car and have to idle to charge, that changes the math a lot
Yes it does. You don't want to do this setup using a car cigarette lighter.
@@OffGridBasement I meant the math of efficiency. Regardless of connection.