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Post by serena on Nov 30, 2016 23:21:06 GMT
Good evening,
A question relating to a narrow boat with 9.9 Yamaha outboard motor.
This boat has 250w low level solar panel with Secca controller and breaker
Two 110ah leisure Batteries
The solar is the only way to charge the leisures! Is there a way to also charge the leisures from the outboard when cruising or is the motor too weak??
Thank you
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Post by JohnV on Dec 1, 2016 0:05:09 GMT
I am not familiar with the 9.9 Yamaha but looking up it's spec it quotes the alternator at only 80 watts, which by my reckoning is only 6 and a bit amps. Not a lot spare I would have thought after charging the starter battery. I suppose if you are really struggling for the last tiny bit of electrickery you could connect the batteries together using a VSR (Voltage sensing relay) but I personally doubt you would get much benefit. One of the proper experts might be along and give you a different view, but for what it's worth that's my take on it,  Welcome to the Thunderboat Serena  |
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Post by serena on Dec 1, 2016 0:11:25 GMT
Thanks Johnv, that's what I thought, thanks for confirmation. Would installing a shoreline hookup be less expensive than buying a Genny for occasional winter boosts then??
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Post by kris on Dec 1, 2016 0:21:35 GMT
I presume from your comment about shoreline your on a mooring with electricity? If so buying a battery charger and using the shoreline will be cheaper than a genny for setup costs and running costs( ie your electric will be cheaper)
Hope that helps till the experts get here.
Oh and welcome aboard thunderboat
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Post by serena on Dec 1, 2016 0:28:22 GMT
Thanks kris, not on a mooring, continuous cruising, thanks
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Post by kris on Dec 1, 2016 0:31:38 GMT
Then the only way is a generator and battery charger.
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Post by serena on Dec 1, 2016 0:32:02 GMT
There is no no plug on the boat for shoreline so would have to install one I guess!? Then power up at marinas sometimes. I'm just trying to figure out what would be the best way forward. Thanks for welcoming me.
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Post by kris on Dec 1, 2016 0:37:44 GMT
id say the generator route, then you can charge your batteries when you need too Which might be a bit more often than you think in winter. I don't know where your crusing, but marinas aren't everywhere and I'd think it would get exspensive paying for mooring plus electric to charge your batteries all the time.
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Post by serena on Dec 1, 2016 0:43:14 GMT
I am very grateful for your responses, thank you. I Guess I shall have to shell out for a generator and charger then😭.
Much obliged, great forum, thanks again x
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Post by kris on Dec 1, 2016 0:48:08 GMT
It wouldn't have to be a large generator particularly. Depends on how much power you use. Some of them are really quiet. You have to be really careful with storing petrol and not running it with the exhaust fumes entering the boat. Oh and when you buy a genny buy a padlock and chain at the same time.
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Post by serena on Dec 1, 2016 1:08:59 GMT
Thanks kris! Hadn't thought about all the other points! Lots to ponder
Thank you so much!
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Post by geo on Dec 1, 2016 1:14:44 GMT
There is no no plug on the boat for shoreline so would have to install one I guess!? Then power up at marinas sometimes. I'm just trying to figure out what would be the best way forward. Thanks for welcoming me. Serena, this is difficult and a grandfather's mind, (I am in my 70s  is say I am wondering how long those batteries will last in this cold. Cold batteries, 0C, produce less electricity than warm ones, 20C. The cold reduces the batteries ability. I am wondering if you should not be heading for a marina and smiling sweetly and getting them to rig you a temporary shoreline and charger while you sort yourself out as whether to sit in a marina on shoreline while it is so cold or go the generator route. You can then calmly look at costs etc in a boat that is working and not in a boat that is closing down and making life difficult. |
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Post by bodger on Dec 1, 2016 9:01:05 GMT
I believe certain smallish outboards have a significant charging capacity - Honda springs to mind (12amps??). However at canal speeds it is unlikely that you would get many amps out of it.
Most electric start outboards are designed just to keep the starter battery charged up.
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Post by Telemachus on Dec 1, 2016 9:52:43 GMT
Yes I think a generator and battery charger would be the only practical answer. As said, whilst the outboard does have a small generator, it would take long days of cruising, every day, to charge the batteries up. I'd look at one of the suitcase generators. I recently bought a kipor which is a poor man's Honda, but it works and starts fine. Something like the IG1000 which is a modest power output but probably adequate and not too heavy. You need a charger whose power demand is quite a bit less than the generator so that it can cope with the initial power surge and a mystical thing called "power factor". I'd suggest something around a 30A charger, or 20A if budget is tight. The Sterling pro charge ultra is good because you can manually set the charging voltages and it doesn't go to float prematurely, but there are cheaper options.
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Post by Deleted on Dec 1, 2016 10:00:29 GMT
Yes I think a generator and battery charger would be the only practical answer. As said, whilst the outboard does have a small generator, it would take long days of cruising, every day, to charge the batteries up. I'd look at one of the suitcase generators. I recently bought a kipor which is a poor man's Honda, but it works and starts fine. Something like the IG1000 which is a modest power output but probably adequate and not too heavy. You need a charger whose power demand is quite a bit less than the generator so that it can cope with the initial power surge and a mystical thing called "power factor". I'd suggest something around a 30A charger, or 20A if budget is tight. The Sterling pro charge ultra is good because you can manually set the charging voltages and it doesn't go to float prematurely, but there are cheaper options. Lat charger I had didn't. I got so frustrated with it, I chucked it in the canal expecting it to go into float, bloody thing sank like a stone! |
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is say I am wondering how long those batteries will last in this cold. Cold batteries, 0C, produce less electricity than warm ones, 20C. The cold reduces the batteries ability. I am wondering if you should not be heading for a marina and smiling sweetly and getting them to rig you a temporary shoreline and charger while you sort yourself out as whether to sit in a marina on shoreline while it is so cold or go the generator route. You can then calmly look at costs etc in a boat that is working and not in a boat that is closing down and making life difficult. 
