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Post Info TOPIC: 5W Solar Panel direct to vechicle battery?
rockylizard


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5W Solar Panel direct to vechicle battery?
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Gday...

Can I safely connect a 5W solar panel without a regulator directly to my car battery permanently without causing any issues whatsoever?

Or what are the problems I'm going to encounter?

cheers - John



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Aus-Kiwi


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I have left car ( WRX Subaru ) at airport with solar on dash for 6 weeks while overseas . Had no issues . The alarm flattens battery if left without charge more than 14 days ., I use it on motorhome now on motor batteries when free camping more than overnight .

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Delta18


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I leave a 5w connected to my boat battery, panel on the roof.  Even after months away the battery is full on return.



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Neil & Lynne

Bacchus Marsh

Victoria

MY17 Isuzu D-Max Dual Cab / 21' Silverline 21-65.3

1260w Solar: 400ah Lithium Battery: 2000w Projecta IP2000 Inverter

Diesel Heater: SOG Toilet Kit: 2.5kw Fujitsu Split System A/c

 

 
oldtrack123


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HI John
Completely OK to leave connected
It does not have sufficient output to overcharge a normal car or van battery.

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macka17


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It's a good idea to solder a one way diode in there to cover any leak back.
If it hasn't already got one.

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jules47


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We had a 10w panel put on top of the hump on the motorhome, to keep the battery charged, when parked up for a while - works well.

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jules
"Love is good for the human being!!"
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macka17


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Price of panels nowadays.
Just buy a 20\40w and stick a 5a reg in line.
That'll cover the trickle and if anything else starts draining.
You have more chance of it NOT draining the battery.
40w = 2.2a.

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