Solar Panel for two Batteries!

The 85Ah leisure battery is not intended for engine starting.. They make the point that it is a leisure battery and therefore do not quote a CCA.
It'll probably do Ok though!

Some leisure batteries have a CCA quoted some do not. ( My current one does not the previous one did)

I think if I was intending to use a leisure battery for engine starting I'd pick one for which a CCA is quoted. It may not mean much but it at least implies that it ought to be suitable for engine starting.

Just my thoughts on the matter ... no more
 
Zagato said:
Cheapest wet batteries seem to be £50

Should I go for 2 x 85AH Leisure batteries e.g.

http://www.tayna.co.uk/Leisure-Battery-Powerline-85-CaravanLeisureMarine-Battery-P7713.html

or a car 45AH and one of the above?

http://www.tayna.co.uk/063-Numax-Car-Battery-P937.html

Anybody know of anything cheaper!! Got to keep costs down so don't mind if they only last a few years, can get better in the future...
Click to expand...

What's the problem with the existing ones? Are you replacing them for piece of mind or are they knackered?
 
The Crabber has been out of the water for 14 months. I put the batteries straight on charge as soon as I got the boat but they were showing below 25%. I eventually got them up to full charge over a number of days but they lose charge very quickly, dropping to below 25% in a week. The water was also below the plates so I think they have had it - going to take them to Halfords today for a check.

Does it matter if I have a 85AH Leisure and a 55AH car starter batterry - do they have to be the same AH or AMPs :confused:

Cheapest wet batteries seem to be £50

Should I go for 2 x 85AH Leisure batteries e.g.

http://www.tayna.co.uk/Leisure-Batte...ery-P7713.html

or a car 45AH and one of the above?

http://www.tayna.co.uk/063-Numax-Car-Battery-P937.html

Anybody know of anything cheaper!! Got to keep costs down so don't mind if they only last a few years, can get better in the future...

Thanks VicS not sure what the Cranking Capacity of a 2GM20 is... Further investigation needed and a bit of phoning around.

I will only ever be using one internal light and a Garmin 5" GPS during the day, I have no other electrics or needs e.g. no electric windlass, bilge pump, sink pump, computer etc so thankfully no gadgets to go wrong!
 
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Zagato said:
The Crabber has been out of the water for 14 months. I put the batteries straight on charge as soon as I got the boat but they were showing below 25%. I eventually got them up to full charge over a number of days but they lose charge very quickly, dropping to below 25% in a week. The water was also below the plates so I think they have had it - going to take them to Halfords today for a check.

Does it matter if I have a 85AH Leisure and a 55AH car starter batterry - do they have to be the same AH or AMPs :confused:

Cheapest wet batteries seem to be £50

Should I go for 2 x 85AH Leisure batteries e.g.

http://www.tayna.co.uk/Leisure-Batte...ery-P7713.html

or a car 45AH and one of the above?

http://www.tayna.co.uk/063-Numax-Car-Battery-P937.html

Anybody know of anything cheaper!! Got to keep costs down so don't mind if they only last a few years, can get better in the future...

Thanks VicS not sure what the Cranking Capacity of a 2GM20 is... Further investigation needed and a bit of phoning around.

I will only ever be using one internal light and a Garmin 5" GPS during the day, I have no other electrics or needs e.g. no electric windlass, bilge pump, sink pump, computer etc so thankfully no gadgets to go wrong!
Click to expand...
If the water is below the plates, you'll never get full voltage from them. Top them up, charge them and see how they respond. My suspicion is that you need 2 new batteries though.
 
Yes both batteries were tested at Halfords and are dud!

Gel batteries :eek: no more confusion I can't take it :confused: Where are my pills :D

I'd be happy with one of the above batteries and a cheaper starter battery but I'm not sure you can put both on together through a 1,2,Both switch and when the negatives are linked together...

More money I didn't account for. You could buy a new small car every year for the price of sailing :rolleyes:

IMG_2893.jpg


Or even a Red Flash for the same money... I give up, battery suppliers don't seem to know either. I suppose there is no right or wrong way to do all this!
 
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Zagato said:
Is it worth paying £10 more for calcium batteries, what ever they are...
Click to expand...

Silver calcium batteries are specified by Ford and others for cars with smart alternators, where there are extra connections to the ecu.

For boat engine starting, a bog standard lead acid is fine - do you know how many cc's your boat engine is - 1200?, 1500? If say 1200cc, then look at batteries for a 1200cc diesel car or, if you want a bit more margin, get one for a 1500cc. Most leisure batteries are not designed for engine starting, they have different plates to allow deeper discharges over longer periods, rather than short period heavy starting loads.

If in doubt talk to Tayna and get their advice, Joe has a wealth of knowledge.
 
Thanks I'll ask for Joe next time ;)

OK got this so far onto two 90AH or AMP batteries!

Ignore the positive connection to the negative. And I don't thik I need diodes if using a controller!

IMG_3027.jpg
 
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GrahamM376 said:
Silver calcium batteries are specified by Ford and others for cars with smart alternators, where there are extra connections to the ecu.

For boat engine starting, a bog standard lead acid is fine - do you know how many cc's your boat engine is - 1200?, 1500? If say 1200cc, then look at batteries for a 1200cc diesel car or, if you want a bit more margin, get one for a 1500cc. Most leisure batteries are not designed for engine starting, they have different plates to allow deeper discharges over longer periods, rather than short period heavy starting loads.

If in doubt talk to Tayna and get their advice, Joe has a wealth of knowledge.
Click to expand...
The OPs engine is a Yanmar 2GM which is 600cc - tiny!
 
GrahamM376 said:
Silver calcium batteries are specified by Ford and others for cars with smart alternators, where there are extra connections to the ecu.

For boat engine starting, a bog standard lead acid is fine - do you know how many cc's your boat engine is - 1200?, 1500? If say 1200cc, then look at batteries for a 1200cc diesel car or, if you want a bit more margin, get one for a 1500cc. Most leisure batteries are not designed for engine starting, they have different plates to allow deeper discharges over longer periods, rather than short period heavy starting loads.

If in doubt talk to Tayna and get their advice, Joe has a wealth of knowledge.
Click to expand...

The calcium-silver batteries specified by Ford for recent models are not the relatively common calcium batteries Zagoto was referring too I suspect.
 
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