Engine starter battery

[Siriussl23]

Can anyone advise please. What size battery in terms of power do I need for a Bukh DV20 engine. The hand book says no bigger than 85AH but the old battery has given up the ghost and it's 110AH, but I think it's a compromise between a starter and domestic battery. I would like to replace it with a dedicated starter battery. Any thoughts. Thanks.

 

[alan17]

I had a Bukh 20 in previous boat. I had a dedicted engine start battery and it was a 40AH. Exactly the same battery as used on a 1200 Vauxhall Nova. I think in battery jargon it is a 363.

 

[Richard10002]

It's CCA that matter, not Ah. I've just repalce a 126Ah starter battery with a 100Ah - merely because it was available, and fits the box. Anything smaller would rattle about.

 

[nordic_ranger]

I have a Bukh 20 and use two 60 amp batteries one as a starter and the other as domestic. I switch between batteries ocasionaly just to keep the domestic toped up.

 

[waterbuffalo]

I use a London Taxi battery.


About £50 from Costco.

 

[BobE]

When I bought the old girl she had 3 Varta 70 a/h fitted one of which was the dedicated Emgine start..
I've replaced them with 3 x 75 a/h Vartas Plus a 680 CCA Odessey which is really small..
The Vartas now supply everthing excapt engine ( Bukh 24 ) starting which is covered by the Odyssey.. You can see details of them all on

http://www.bardenbatteries.co.uk/

The Odeddey is not cheap but they can be mounted on their sides and take up minimal space..
So far, after three years, no problems and stacks of capacity (well 225 a/h i/o 140 a/h) from the 3 Vartas for all the electronics and fridge...
That's the kiss of bleedin' death I s'pose!
Cheers Bob E...

 

[steveallan]

If you are only using it to start the engine then go to Halfords and buy the cheapest 80 amh battery they have.

 

[BobE]

If you've got the space for it... I'd agree...
Cheers Bob E....

 

[BobE]

How many ways can I spell......

Odyssey AGM (Gel Type)

I'd better start writing those lines
sorry 'n Cheers as ever Bob E....

 

[macd]

Couldn't agree more. Mine starts a 2 litre Transit diesel, so has no problems with a 1 litre Beta. Starter batteries aren't very bright: they never twig that they're on a boat.

 

[dam747iam]

battery code 096 used on transit and other diesel vans and cars

 

[Dave_Rolfe]

I have never heard of a 'no more than' size quoted for an engine start battery. I have just fitted an extra battery dedicated to engine start (for a Yanmar 2GM20) and fitted a 95Ah (about 680CCA) as it was cheaper than a 70Ah from the same supplier. Shop around for the best price as Halfords were about £20 more than I paid from a local battery outlet (Exeter Battery Centre, excellent). It also gives me a little in reserve if the domestic batteries ever go a bit low.