Ecoflow Bluetti

molly 2

molly 2

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I am tempted to buy a power station , as a back up for van and home ,can I connect it to my 12 van system when my L battery is getting low without using 240 volts for hook up .going through the power station inverta would waste power , their is a 12 v supply cig lighter out put of around ten amps that would run more than I need ,would it possible to connect to L battery if needed . Or not .? Bazz
 
Wait for someone who knows Baz by my gut says yes you can. Reason I think that is those jump start things that plug into your cigarette lighter and power goes to starter battery.
 
No . You cannot just plug it into the leisure battery you will need some form of DC to DC converter to sort it out. Be cheaper just to buy a lithium battery and fit that. Like all this modern tech if you use it you have to find a way of recharging it. During the winter you would be very lucky to put much charge back in unless you plugged it into the mains.
 
prioryi said:
I have a Poweroak ps10 and I have connected the vans hook up to the 240v mains socket on the poweroak and that can then power the on board battery charger for the leisure battery's
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I agree this is likely to be best !
It will also recharge thr onboard leisure battery and so will discharge the external powerbank more quickly and so will need to recharge it but with your onboard battery topped up that should be ok.
I suggest that fridge is run on gas and no silly items such as an inverter in use !
Maybe 2 nights without ehu ? Then ehu to recharge
 
I know you can recharge the Bluetti off alternator whilst running how long to say raise it from 25% to 75% ?
 
QFour said:
No . You cannot just plug it into the leisure battery you will need some form of DC to DC converter to sort it out. Be cheaper just to buy a lithium battery and fit that. Like all this modern tech if you use it you have to find a way of recharging it. During the winter you would be very lucky to put much charge back in unless you plugged it into the mains.
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Why would I need dc to dc conversion as power banks put out 12 v dc ? , Am i missing somthing
 
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molly 2 said:
Question
I am tempted to buy a power station , as a back up for van and home ,can I connect it to my 12 van system when my L battery is getting low without using 240 volts for hook up .going through the power station inverta would waste power , their is a 12 v supply cig lighter out put of around ten amps that would run more than I need ,would it possible to connect to L battery if needed . Or not .? Bazz
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You will need to plug a battery charger into the 240v 3 pin socket and crocodile clip this to the leisure battery.

Or as stated above if using the 12v socket your will require a battery to battery charger.

The charge needs to be controlled else you will damage the battery being charged.

What I found though is that the Sargent power box can’t cope with this independent form of charging and so the battery needs to be disconnected from the 12v circuit which then means none of 12v system can be used whilst independently charging. This might only apply to Sargent power boxes. Don’t know about other types.

Honestly though I find it much simpler to use a 3 pin adapter and with the hook up cable hook up the power pack to the van hook up socket and use the onboard battery charger. I feed the lead through a window which I can still shut on the latches. Then you can use the 12v system whilst charging with the onboard charger.

We have a Bluetti Poweroak EB240 which is the best value unit if you want plenty of power without all the bells and whistles that are nice to have but not a need to have. I simply wanted massive power, a 12v socket, a 240v socket and charging by either 240v ac or solar. It offers us the equivalent of 4amp hook up. It is slow to charge with the power brick however this is not an issue for us as we use solar mainly. We really wanted it for ebike charging when not hooked up and leisure battery charging when we are sun poor.
 
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Nabsim said:
Why will connecting it damage the battery? 12v outlet from power bank on to a 12v battery is no different to connecting another 12v battery in line. Or am I missing something?
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The voltage required to charge a leisure battery has to be higher than the battery itself or else it will not charge.

That is where an inverter and charger comes in. It increases the 12v socket output to upwards of 14v which then forces current into the battery being charged. It also prevents the battery being overcharged by changing the charging profile as it charges. But then why do all this when you can simply plug a charger directly into the onboard 240v power station inverter.

The 12v socket in the power station is a one way power out socket only. It won’t charge the lead acid battery beyond 12v and as it’s a one way socket the series type connection comparison is not valid.

If you connect 2 equivalent and identical 12v leisure batteries together, one charged and one discharged, you are not adding anything to the power bank as the charged battery will discharge by the amount the discharged battery draws. The discharged battery will never fully charge.

You need to introduce a higher voltage to fully charge a discharged battery.
 
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My Bluetti outputs 13.28V from the 12V output but the battery inside is not 12V so whatever you use it is being converted/inverted to achieve the output voltage. AC200P has a 50V battery
 
Moped said:
The voltage required to charge a leisure battery has to be higher than the battery itself or else it will not charge.

That is where an inverter and charger comes in. It increases the 12v socket output to upwards of 14v which then forces current into the battery being charged. It also prevents the battery being overcharged by changing the charging profile as it charges. But then why do all this when you can simply plug a charger directly into the onboard 240v power station inverter.

The 12v socket in the power station is a one way power out socket only. It won’t charge the lead acid battery beyond 12v and as it’s a one way socket the series type connection comparison is not valid.

If you connect 2 equivalent and identical 12v leisure batteries together, one charged and one discharged, you are not adding anything to the power bank as the charged battery will discharge by the amount the discharged battery draws. The discharged battery will never fully charge.

You need to introduce a higher voltage to fully charge a discharged battery.
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What you say makes sense in that you would need a decent smart charger to charge a discharged battery to over 80%.
 
Nabsim said:
Why will connecting it damage the battery? 12v outlet from power bank on to a 12v battery is no different to connecting another 12v battery in line. Or am I missing something?
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You have to control the transfer of energy from one to the other otherwise you will melt cables and destroy batteries. The battery charger controls the flow of electrons into the battery. The DC to DC converter does exactly the same thing it controls the flow of electrons from one battery to the other.
 
Victron dc to dc converta , converts 24 v to 12 v , I don't get why I would need a converta to covnvert 12 v DC from power Station to 12 v DC to leasure batter ? .
 
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