Chris_Stannard
New member
I have a Tudor battery in my boat which needs replacing. Does anyone know where I can get them, location Isle of Wight or Southamptonish?
Chris Stannard
Chris Stannard
Tudor Battery
- Thread starter Chris_Stannard
- Start date
HaraldS
New member
Chris,
I see that you also have a Najad, so it might well be the same batteries I have. I did check this out as my plan was to use the regular batteries for four years and replace them before leaving the civilized world with something more lasting, like Gel or AGM.
They do have standard measures so it is possible to find all sorts of alternatives that fit in the same box.
The Tudors are made in Sweden and I have not found them elsewhere. They are of the robust semi-traction type and have the following spec:
12 VOLT HDX [Tudor Sweden]
AmpHrs.: 145Ah
Crank Amps: 1050A
Length: 513mm / 20.2”
Width: 189mm / 7.44”
Height: 220mm / 8.66”
Config: 3
Pole Type: 1
Weight: 40.0kg
They are used in busses and trucks, so fairly good price performance.
You should be able to find all sorts of alternative ones.
I see that you also have a Najad, so it might well be the same batteries I have. I did check this out as my plan was to use the regular batteries for four years and replace them before leaving the civilized world with something more lasting, like Gel or AGM.
They do have standard measures so it is possible to find all sorts of alternatives that fit in the same box.
The Tudors are made in Sweden and I have not found them elsewhere. They are of the robust semi-traction type and have the following spec:
12 VOLT HDX [Tudor Sweden]
AmpHrs.: 145Ah
Crank Amps: 1050A
Length: 513mm / 20.2”
Width: 189mm / 7.44”
Height: 220mm / 8.66”
Config: 3
Pole Type: 1
Weight: 40.0kg
They are used in busses and trucks, so fairly good price performance.
You should be able to find all sorts of alternative ones.
Chris_Stannard
New member
Many thanks for the advice. I will have a search and let you know if I find one.
Chris Stannard
Chris Stannard
Chris_Stannard
New member
Najad Battery - Supplier
I am told that John Tuffin on 0046303 331000 (in Sweden) can supply through Exide in this country.
My research to date indicates that other manufacturers only get about 110 aH into the same volume.
A thought for all Najad owners is that if we all throw a tenner in then perhaps Najad could be persuaded to keep a few batteries in stock so we would have them to hand when we needed them. Once the stock is established people would obviously pay for them and Najad could add a handling charge for the re-order process
Chris Stannard
I am told that John Tuffin on 0046303 331000 (in Sweden) can supply through Exide in this country.
My research to date indicates that other manufacturers only get about 110 aH into the same volume.
A thought for all Najad owners is that if we all throw a tenner in then perhaps Najad could be persuaded to keep a few batteries in stock so we would have them to hand when we needed them. Once the stock is established people would obviously pay for them and Najad could add a handling charge for the re-order process
Chris Stannard
HaraldS
New member
Re: Najad Battery - Supplier
From my experience so far, the Tudor Battries that Najad supplied are pretty decent, but probably not worth shipping the weight around. You are right though that many of the same size are rated lower.
I plan to replace them in two years and was planning to go to Gel or AGM. I have found several Gel batteries in that size, they are all 120Ah. Haven't found and AGM in the same form factor yet.
A 120Ah Gel battery should have about the same usable capacity as the 145Ah Tudor, since you can discharge it lower without harming it.
On a 'normal' day, sailing and at anchor I run my battreies down to 45% and back up to 85%, because this type of battery doesn't like it too much going belowe 50% that's already stretching it, and I can fast charge to 85%, but then it takes time. They get topped up only if I need to motor for a longer time or if connected to shore power, so maybe once a week, which is just often enaough to keep them happy.
The Gel battery you can frequently take down to 30% without problem, with the right type Gel youcan fast charge to 85% aswell, but there is no need to top them up as frequent, every 30 cycles is sufficient.
So for me the Gel battery would be: 85% down to 30% = 55%; 55% *120Ah = 66Ah.
My current Tudors: 85% down to 45% = 40%; 40% * 145Ah = 58Ah.
The good thing about the Tudor is the high crancking amps (way more than we need as these are my service batteries), but it also translates into permitting a higher charging current. Normal Gel batteries shouldn't be charged herder than with 10% - 15% of their Capacity rating, which would mean no more than 18A for one battery. The Tudors I charge with about 30Amps each up the the 85%. About the same can be accomplished by a somewhat better type of Gel battery.
Here are some samples:
Exide G120 12
AmpHrs.: 120Ah
Crank Amps: 450A
Length: 513mm
Width: 189mm
Height: 223mm
Config: 3
Pole Type: 1
Weight: 40.7kg
Sonnenschein/Prevalier DF4DLT same as above, except Cranking = 650A
Sonnenschein A200 Series: A212/120 same as above but: 41.6kg, 2600A for 5sec.
The last one is one that can absorb more current.
You need to see if you need that. I definitely do as my shore and generator charger does 75A at 24V, each of the six batteries gets up to about 25A.
The engine alternator is even bigger, rated at 135A 24V, but I'd say 100A is realistic, so over 30A per battery. Off course you need a smart regulator to do that, but I saw that you are getting one.
The benefit of this is that I can replenish a days use in about an hour and a half, generator or engine, which doesn't matter much.
Hope that helps.
From my experience so far, the Tudor Battries that Najad supplied are pretty decent, but probably not worth shipping the weight around. You are right though that many of the same size are rated lower.
I plan to replace them in two years and was planning to go to Gel or AGM. I have found several Gel batteries in that size, they are all 120Ah. Haven't found and AGM in the same form factor yet.
A 120Ah Gel battery should have about the same usable capacity as the 145Ah Tudor, since you can discharge it lower without harming it.
On a 'normal' day, sailing and at anchor I run my battreies down to 45% and back up to 85%, because this type of battery doesn't like it too much going belowe 50% that's already stretching it, and I can fast charge to 85%, but then it takes time. They get topped up only if I need to motor for a longer time or if connected to shore power, so maybe once a week, which is just often enaough to keep them happy.
The Gel battery you can frequently take down to 30% without problem, with the right type Gel youcan fast charge to 85% aswell, but there is no need to top them up as frequent, every 30 cycles is sufficient.
So for me the Gel battery would be: 85% down to 30% = 55%; 55% *120Ah = 66Ah.
My current Tudors: 85% down to 45% = 40%; 40% * 145Ah = 58Ah.
The good thing about the Tudor is the high crancking amps (way more than we need as these are my service batteries), but it also translates into permitting a higher charging current. Normal Gel batteries shouldn't be charged herder than with 10% - 15% of their Capacity rating, which would mean no more than 18A for one battery. The Tudors I charge with about 30Amps each up the the 85%. About the same can be accomplished by a somewhat better type of Gel battery.
Here are some samples:
Exide G120 12
AmpHrs.: 120Ah
Crank Amps: 450A
Length: 513mm
Width: 189mm
Height: 223mm
Config: 3
Pole Type: 1
Weight: 40.7kg
Sonnenschein/Prevalier DF4DLT same as above, except Cranking = 650A
Sonnenschein A200 Series: A212/120 same as above but: 41.6kg, 2600A for 5sec.
The last one is one that can absorb more current.
You need to see if you need that. I definitely do as my shore and generator charger does 75A at 24V, each of the six batteries gets up to about 25A.
The engine alternator is even bigger, rated at 135A 24V, but I'd say 100A is realistic, so over 30A per battery. Off course you need a smart regulator to do that, but I saw that you are getting one.
The benefit of this is that I can replenish a days use in about an hour and a half, generator or engine, which doesn't matter much.
Hope that helps.
HaraldS
New member
Re: Najad Battery - Supplier
Forgot to ask, but very curious: How long did your Tudors last?
Forgot to ask, but very curious: How long did your Tudors last?
Frank Hatfull
New member
Najad Owners Frorum
I replaced mine with Exide.
Have a look at The Najad Owners Forum for further discussions
www.Najadowners.co.uk
Frank Hatfull
I replaced mine with Exide.
Have a look at The Najad Owners Forum for further discussions
www.Najadowners.co.uk
Frank Hatfull
youngwrinkley
Member
Tudor batteries
I fitted two of them to my old Boat, Tudor Rose, and they lasted 12 and 14 years! I wish I could get some more.
I fitted two of them to my old Boat, Tudor Rose, and they lasted 12 and 14 years! I wish I could get some more.
