Help - Can someone answer - series or parallel connected ?

[Refueler]

I have been sent a photo of 4 Trojan 6V batterys connected to power a machine ... but I cannot decide if they are series connected to make 24V or parallel ?

Please can someone look and help ?

 

[KevinV]

Unless I've totally lost the plot that's in series, giving 24V

 

[Stemar]

If you want 24v, connect in series, +ve on one to -ve on the next.

Parallel will give you 6v. To get 12v, connect pairs in parallel and the pairs in series

 

[ylop]

Unless I've totally lost the plot that's in series, giving 24V

Agreed you can see "NEG" on the battery closest to camera and as all the batteries are the same brand can work out from there what's what.

 

[MontyMariner]

They are all wired in series to give 24v

 

[billskip]

Looks to me like it's 18v..the left hand pair (front and back) .....I'm wrong the other two are physically reversed...sorry..

 

[rogerthebodger]

They are all wired in series to give 24v

Agree if you masure the DC voltage on the red connector on the externe right will confirm

 

[MontyMariner]

Looks to me like it's 18v..the left hand pair (front and back) .....I'm wrong the other two are physically reversed...sorry..

No, look where the battery labels are, the back 3 are the opposite way round to the front 3.

 

[billskip]

No, look where the battery labels are, the back 3 are the opposite way round to the front 3.

Yes I realised my mistake re the labels and as you can see I edited my post, I apologise

 

[ylop]

Agree if you masure the DC voltage on the red connector on the externe right will confirm

Only if they are charged!

 

[rogerthebodger]

Only if they are charged!

Yes if they are complety flat with no voltage but if they are zero volts they may be shot anyway,

You can check the voltage on each battery and add to together and compare with the reading on the red plug

 

[Refueler]

I went back to the photos after posting and as others noted - its 24v setup.

I'm now questioning whether I want to drive the near 5hrs to view the machine .... guy advertised as having new batterys - but when we spoke to him today - he says batterys need replacement. He offered a 200 euro discount !!

They are Trojan T105 6v .... 4 of them .... at about 240 euros EACH !

The battery rack is designed for them - so question is whether another brand could fit in there ... whether possible to substitute two 12v deep cycles in their place ? With same AH rating.

 

[billskip]

It's risky,.. but make him an offer what you are prepared to pay tak it or leave it.
Risk is he my agree and when you get there he changes his mind.

 

[Alicatt]

Our boat originally in 1978 had 4 x 6V batteries in series to give 24V for the house load, they have been replaced with 2 x 12V 310AH to give 24V, also has 2 smaller 12V batteries in series to give 24V for the engines. Now the battery compartment is half empty with only the 2 12V semi traction batteries and the 2 start batteries


I replaced those batteries with new ones, these two were off gassing and tripping the gas detector.

Edit: Page from the manual, there were 8 6V batteries so, series + parallel connection to give 24V

 

[William_H]

Hi Nigel that is a bit of a dilemma for you re driving 5 hours to view the cherry picker. I hope you can get a satisfactory outcome.
Regarding batteries I have just taken delivery of 2x 50AH lithium LiFePo4 batteries for my mobility scooter. 24 v x2 in series. I am happy with outcome and found the lithium cheaper that slightly less capacity LA. (40AH)
The batteries have built in charge controller and in my case 50 amp load current limited. About half the weight. of LA.
My recharging is quite low current 2 amps or less. No need for rapid recharge.
What may be a concern is I think the charge controller will cut supply when batteries get low. Possibly no warning could leave you hanging up there. Unless there is a get down function no power. I presume this is a hydraulic controlled electric pump arrangement.
Look for Lifetime batteries from China. I was amazed at the (free) delivery time. (Perhaps I should thank Donald Trump)
Anyway time will tell if they are good batteries but so far so good. Might suit Cherry picker. ol'will

 

[garymalmgren]

to power a machine

Off topic, but what actually is "the machine"
It must be pretty old to have that set up.

gary

 

[Bouba]

It’s very difficult to make out from the photo….but as a general rule….you usually have 6v batteries in a series to get the voltage higher

 

[Refueler]

Machine is a Meiller 123 .. 15,5m height unit.

What may be a concern is I think the charge controller will cut supply when batteries get low. Possibly no warning could leave you hanging up there. Unless there is a get down function no power. I presume this is a hydraulic controlled electric pump arrangement.

All machines asimilar are fitted with manual pump as well ... so person on ground can actually raise / lower in event of electric failure. Of course lowering is quicker than raising !! And hard work ...

I'm reluctant to drive 5hrs if guy is not willing to keep to the advertisement claim of new batterys.

I've checked online here and regardless of Trojan or not - the 225Ahr specification of 24V and Deep Cycle gives similar costs whatever batterys I go for ... FLA .. AGM .... LiFePo4 ..... in bank of 6V or 12V units ~ 1000 euros

 

[Bouba]

to power a machine

Off topic, but what actually is "the machine"
It must be pretty old to have that set up.

gary

It could be a wheel chair or golf buggy

 

[Refueler]

It could be a wheel chair or golf buggy

Here ye go :