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Old 04 December 2015, 12:47   #1
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Solar trickle charger

Was thinking of rigging a small solar trickle charger up in my Sib.
My engine has no electric feed.
Got a fixed VHF, running off a 20ah, a plotter, running off a 7ah and colour fishfinder running off a 7ah battery.
Was going to get a small solar charger and mount it to my bow box.
Not clued up on electric stuff - question is - is this worth considering.
How much will a small solar panel charge up my battery.
Would probably leave it hooked up to the 20ah to help replenish what's being drawn out of it by the VHF.
Is this worth consideration.
Thanks in advance
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Old 04 December 2015, 13:46   #2
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Kaman

Why not look into engine charging solves all your problems solar ok for keeping topped up when not in use had one on a fast fisher wasn't impressed with performance though.

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Old 04 December 2015, 18:04   #3
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Howdy Jeff
Engine charging looks to be an expensive add on.
I do a fair amount of drift fishing and at anchor as well so my engine not running a lot of the time.
Dunno how good the solar chargers are just looking to top my batteries up when away fishing / wild camping over a few days as my current batteries only last me 2 days.
Maybe another couple of batteries would be a better solution??
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Old 05 December 2015, 01:59   #4
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Can't help but think that carrying 3 batteries in a SIB is not efficient.

Your panel will have a power rating in watts. You will struggle to achieve that as that's Max power. Needs bright sun and perfect alignment. Typical estimate is 25-50% of rated power. So a 4W panel given 1W. 1W is 1/12 of an amp. So to replace 1Ah a 4W panel takes 12hours. You can probably take 10Ah out the 20Ah battery before it starts to affect performance. To replace that you need 120hrs in light... With a 4W panel. I'd expect anything above 8-10W becomes problematic for space on a SIB.

You really need to know what you are consuming in typical conditions...
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Old 05 December 2015, 03:14   #5
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In reality a practically sized solar panel isn't going to be of any benefit over the course of a day.

I did see this on the shore of Loch Shiel last year though....

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Old 05 December 2015, 03:47   #6
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Cheers guys.
S.S your tech break down puts it in perspective.
Not going to get anywhere near enough power from a small solar panel.
I think a deep cycle leisure battery of 40 ah is the way ahead.
I can use my 20 ah as well.
If I'm away from civilisation for 3 or 4 days if conservative (turning plotter and fish finder off when anchored etc) these two batteries should suffice my needs.
Could always keep one of the 7ah batteries handy for emergencies.
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Old 05 December 2015, 05:22   #7
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Quote:
Originally Posted by kaman View Post
Howdy Jeff
Engine charging looks to be an expensive add on.
I do a fair amount of drift fishing and at anchor as well so my engine not running a lot of the time.
Dunno how good the solar chargers are just looking to top my batteries up when away fishing / wild camping over a few days as my current batteries only last me 2 days.
Maybe another couple of batteries would be a better solution??
I think you have a 20 tohatsu which has an alternator which will charge at around 14volts put a volt meter in line you can then monitor your battery, cost for that 10 off eBay granted you don't run the engine all the time but that will bang more juice in than a solar panel, as said solar not going to help you need to look at a charging kit (second rectifier & fused loom) for my Suzuki was 106 tohatsu will be cheaper possibly,that would keep you going for your wild camping for a few days a second battery possible but it's getting more complicated and more risk with a spare floating about to be honest 20A battery and charge from engine will be all you need don't forget running to and from you will be charging.

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Old 05 December 2015, 09:49   #8
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Hi Jeff it's a 2010 Tohatsu MFS 20C 4 stroke.
I wasn't sure if it had an alternator or not.
Did some research on the net a few months back and thought that it was going to be too much grief and expense.
I will stick a post in the outboard section and see if anyone has any knowledge of what's required.
Cheers.
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Old 05 December 2015, 10:30   #9
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Hi Jeff it's a 2010 Tohatsu MFS 20C 4 stroke.
I wasn't sure if it had an alternator or not.
Did some research on the net a few months back and thought that it was going to be too much grief and expense.
I will stick a post in the outboard section and see if anyone has any knowledge of what's required.
Cheers.
Sorry mate answered your other post before seeing this I had a look on the tohatsu site and they spec an alternator for the 20' what I did was ring up Suzuki with engine info asking can I charge a battery and what do I need.granted it took um four weeks only because out of all the sales team it appeared only one guy knew so it took a while suppose I was in a que and minor in the scheme of things. On the web site quite a few dealers round you so a quick call might get you sorted best way to go mate best of luck.

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Old 05 December 2015, 18:32   #10
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Cheers for your help Jeff.
I'll have a look under the cowling tomorrow and see if there's an alternator in there.
The only thing electrically powered is the small oil presume warning diode.
Must be getting power from somewhere.
There's lots of electrical wiring just behind the fuel hose attachment as I recall.
Hmmmmmmm?
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