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Charging Lithium with Solar whilst fishing (9 posts / 4,471 views)
poms
Posts: 791
#1 23 Apr 2025 16:40
0
Guys, ive got a 150W Solar panel that charges my power pack, an Atom, with no issues whist out on the bank.

What do I need to charge my Lithium 12v 100aH whilst out fishing.

Does anyone successfully do this ? Do you use a controller and or a invertor for the Lithium battery charger ???

Any advice much appreciated.

The_Andyman The_Andyman
Posts: 11,320
#2 23 Apr 2025 17:51
0
In reply to Post #1
You will need a charge controller like the below example, however, you must make sure it has a lithium mode like the below example too. In short, solar cables to the controller and the cables from the controller to the battery,

LINKY POO™ https://www.amazon.co.uk/dp/B0CCTZ8WPZ?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1
Reedy Reedy
Posts: 775
#3 25 May 2025 08:44
1
In reply to Post #1
I use a 125amp solar panel and charge controller from Eco Worthy and charge 100ah batteries with no issue - as said already, get a charge controller as this will stop you over charging.

Also you can see the input AH - it makes a huge difference when positioning the panel- a quick move can increase the input massively
nexus6
Posts: 172
#4 25 May 2025 17:41
0
In reply to Post #3
how long does it take on a sunny day to charge 100A Lithium with a 125A panel?
Karlos Karlos
MODERATOR
Posts: 14,136
#5 25 May 2025 22:35
1
In reply to Post #4
Assuming an 85% efficiency and 6 hours of peak sunlight per day, it could take approximately 2 days to fully charge a 100Ah battery.

The actual charging time will vary depending on factors like sunlight conditions, shading, and the efficiency of the charge controller.

My 100W solar panel will give my battery 80w to 90w in full strong sunlight. It will continue to trickle power in, even into the evening...but obviously the charge reduces as the sun gets lower in the sky and weaker
Reedy Reedy
Posts: 775
#6 27 May 2025 21:52
2
In reply to Post #4
That's a tough one, as said by Karlos there are so many variables

I have achieved 5.5amps in good sunshine but you need to constant check and move the panel to get the best results.

I use it for keeping batteries topped up, not letting them get too low
nexus6
Posts: 172
#7 31 May 2025 14:57
0
In reply to Post #5
sod it - I'll continue to check in to an Air&b once a week.............recharge everything including myself!
poms
Posts: 791
#8 7 Jul 2025 08:28
0
In reply to Post #5
Karlos, what charge controller do you use inbetween your panel and your battery ?
Karlos Karlos
MODERATOR
Posts: 14,136
#9 8 Jul 2025 13:50
0
In reply to Post #8
Nowadays I just use a Jackery battery and Jackery panel.

Battery storage
LINKY POO™ https://uk.jackery.com/products/explorer-500w-portable-power-station

Solar Panel
LINKY POO™ https://uk.jackery.com/products/solarsaga-100w-solar-panel

Gone are the days of having solar panel, charge controller and crocodile clips/leads everywhere. The panel plugs directly into the round input socket

The Jackery isn't going to be something you would want in the boat with you (I'd guess) but I use mine to charge everything smaller than itself. I guess it could be used to top up a big battery (for boat/sonar) in between boat uses...
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