Charging AC200P Bluetti with batteries

JayB

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May 24, 2021
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I am thinking of placing 5 Fullriver LiFePO4 12V 22.5 amp battery packs in series, to charge my Bluetti through the solar charging port. This will have the potential to deliver 1,350 watts. Bluetti maxes out at 700 watts for solar input. Does this mean over 700 watts causes a problem or does it mean the Bluetti limits it's intake to 700 watts?
I assume this will not cause any harm?
Thanks. Jay
 

Johnjayjrv

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I'm doing this the exact way in that video but with 48v lifepo4 pack. I use the ac200p charger to charge the pack too.
 

JoshuaG

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That sounds cool! I'd love to see it. I'm thinking of doing something similar.
 

Johnjayjrv

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20210612_192716.jpg


It's at 100% so it's not charging but it charges at about 650w. I also have a CTK300 solar charge controller to charge the batteries with 2 bluetti panels. I have 2 battery banks so I can solar charge 1 and use the other and switch out when one is depleted.20210612_192713.jpg
 

nifty-stuff.com

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I was going to start a new thread, but figured I'd piggy-back on this one even though my question is slightly different! ;)

I've watched all of jehugarcia's videos on how to extend the battery on the Bluetti AC200p (and he has a LOT of them), but they are all higher voltage battery packs.

My question is this: Can I just go the simple / slow route and get one of the batteries Will lists on this page: https://www.mobile-solarpower.com/lithium-batteries.html

... and just hook it (12v or 24v battery) up direct to the DC input and set the charge to "car"?

I know it will SLOW charge, but I'm cool with that.

Besides charge speed, any other cons to extending the battery capacity with an off-the-shelf 12v LifePo4 battery?

Thanks!
 

Discharged

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I would use 24v minimum. But you can use either.
Is it possible to see your whole Jehu Garcia extra battery setup? especially how you are charging the extra battteries. I'm thinking of going this route with the scooter batteries and looking to see how people are charging the extra batteries. Thank you.
 

Johnjayjrv

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Is it possible to see your whole Jehu Garcia extra battery setup? especially how you are charging the extra battteries. I'm thinking of going this route with the scooter batteries and looking to see how people are charging the extra batteries. Thank you.
I have the 12v battery packs from Jehu. I have them in series to make 48v. I have 2 48v packs. I use the AC200P charger to charge the packs. I confirmed from Bluetti that it is a 3 stage charger. Haven't had an issue yet using it to charge the battery pack. I also have a CTK300 Solar Charge controller to use 2 110w panels to charge the batteries.
 

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nifty-stuff.com

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I have the 12v battery packs from Jehu.
Oh man, I went to go buy these and they were sold out! Good job grabbing them!

I have 2 48v packs. I use the AC200P charger to charge the packs. I confirmed from Bluetti that it is a 3 stage charger. Haven't had an issue yet using it to charge the battery pack.
Can you clarify this a bit for a newbie like me? :D How is the AC200P charging a 48v LiFePO4 pack properly? There isn't a 48v output, right? Are you using one of the 12v out and splitting the pack up in 4 pieces for charging?
 

Johnjayjrv

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Oh man, I went to go buy these and they were sold out! Good job grabbing them!


Can you clarify this a bit for a newbie like me? :D How is the AC200P charging a 48v LiFePO4 pack properly? There isn't a 48v output, right? Are you using one of the 12v out and splitting the pack up in 4 pieces for charging?
It's the other way around. The batteries are charging the Bluetti. I have 4 12v packs from Jehu in series. Each pack has xt60 connectors then I made a series cable to connect them. Series is when you bump up the voltage by connecting the batteries positive to negative. I then have an xt90 connector to the series cable. I then use the Accessory connection that came with the AC200P to connect to the xt90 battery pack.

Hope this is helpful.
 

Discharged

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It's the other way around. The batteries are charging the Bluetti. I have 4 12v packs from Jehu in series. Each pack has xt60 connectors then I made a series cable to connect them. Series is when you bump up the voltage by connecting the batteries positive to negative. I then have an xt90 connector to the series cable. I then use the Accessory connection that came with the AC200P to connect to the xt90 battery pack.

Hope this is helpful.
Ok.... So, you the Bluetti has extra battery capacity which is nice but what do you do when those extra batteries deplete to the point that they need to be recharged? How do you charge the extra batteries?
 

dmholmes

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I was going to start a new thread, but figured I'd piggy-back on this one even though my question is slightly different! ;)

I've watched all of jehugarcia's videos on how to extend the battery on the Bluetti AC200p (and he has a LOT of them), but they are all higher voltage battery packs.

My question is this: Can I just go the simple / slow route and get one of the batteries Will lists on this page: https://www.mobile-solarpower.com/lithium-batteries.html

... and just hook it (12v or 24v battery) up direct to the DC input and set the charge to "car"?

I know it will SLOW charge, but I'm cool with that.

Besides charge speed, any other cons to extending the battery capacity with an off-the-shelf 12v LifePo4 battery?

Thanks!
Bluetti sells the cable to charge from 12v/24v battery, do you mean something else?

I wonder if anybody has tried a boost converter to get to 36v?
 

dmholmes

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Ok.... So, you the Bluetti has extra battery capacity which is nice but what do you do when those extra batteries deplete to the point that they need to be recharged? How do you charge the extra batteries?
AC200P -> AC charger -> battery, with the losses :(
 

Discharged

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AC200P -> AC charger -> battery, with the losses :(
If using a 36v 18a charger, that is around 1400 watts to charge a set of 4 scooter batteries (similar setup to what Johnjayjrv has). I know that Bluetti AC200P has a 1800 watt capacity before it starts to give off alarms. So, you lose most of your wattages to charge the batteries that you are using extra battery capacity. Which in turn makes the Bluetti with extra batteries...useless if you have to use the Bluetti to charge the extra batteries.
 

dmholmes

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If using a 36v 18a charger, that is around 1400 watts to charge a set of 4 scooter batteries (similar setup to what Johnjayjrv has). I know that Bluetti AC200P has a 1800 watt capacity before it starts to give off alarms. So, you lose most of your wattages to charge the batteries that you are using extra battery capacity. Which in turn makes the Bluetti with extra batteries...useless if you have to use the Bluetti to charge the extra batteries.
Would work out better for my application. If AC200P is fully charged, full 700 watt solar input, and charging a 100ah battery. But still not great with the conversion loss.
 

nifty-stuff.com

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It's the other way around. The batteries are charging the Bluetti. I have 4 12v packs from Jehu in series. Each pack has xt60 connectors then I made a series cable to connect them. Series is when you bump up the voltage by connecting the batteries positive to negative. I then have an xt90 connector to the series cable. I then use the Accessory connection that came with the AC200P to connect to the xt90 battery pack.

Hope this is helpful.
Thanks for the clarification... but I think I must have miscommunicated, sorry. I'm planning to use external packs to charge the AC200P just like you're doing, but my question is: How are you charging your external 48v pack? Are you using an external LifePo4 charger (which one), power supply, something else? Thanks!
 

Johnjayjrv

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Thanks for the clarification... but I think I must have miscommunicated, sorry. I'm planning to use external packs to charge the AC200P just like you're doing, but my question is: How are you charging your external 48v pack? Are you using an external LifePo4 charger (which one), power supply, something else? Thanks!
I use a solar boost charge controller, CTK300, when not near land power and when by a power source, I use the Bluetti charger. I had to buy the 7909 to XT90 adapter to connect the charger but it works great.
 

nifty-stuff.com

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I use a solar boost charge controller, CTK300, when not near land power and when by a power source, I use the Bluetti charger. I had to buy the 7909 to XT90 adapter to connect the charger but it works great.

Brilliant, thanks!

I'm SUPER excited to receive the unit I just ordered... and posted a few questions / ideas here:
 
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