Solar panel charger for leisure battery

AndyJF replied on 08/11/2021 10:29

Posted on 08/11/2021 10:29

I'm looking for a solar panel charging kit to keep my leisure battery topped up. Can anyone recommend a product that works and won't stop working after a few weeks please? Something like this, but some of these panel kits seem suspiciously cheap -

20W Solar Panel

 

AndyJF replied on 08/11/2021 10:47

Posted on 08/11/2021 10:39 by SleafordQuin

I have just had a victron 175w panel and a bluesmart 75/15 mppt controler installed on my motorhome.  Working a treat

 

https://www.sunstore.co.uk/product/175w-12v-mppt-solar-battery-charger-vehicle-kit/

Posted on 08/11/2021 10:47

Wow that's expensive. Do you really get 175W out of that panel?! I think 10W or 20W is sufficient to charge the battery. 

Do you need that power to run appliances directly off the panel?

 

SeasideBill replied on 08/11/2021 10:53

Posted on 08/11/2021 10:29 by AndyJF

I'm looking for a solar panel charging kit to keep my leisure battery topped up. Can anyone recommend a product that works and won't stop working after a few weeks please? Something like this, but some of these panel kits seem suspiciously cheap -

https://www.amazon.co.uk/Monocrystalline-Charge-Controller-Extension-Battery/dp/B07RZBVTGR/ref=asc_df_B07RZBVTGR/?tag=&linkCode=df0&hvadid=375423088030&hvpos=&hvnetw=g&hvrand=12220336403084661279&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1007129&hvtargid=pla-843716935674&ref=&adgrpid=82457260731&th=1#descriptionAndDetails

 

Posted on 08/11/2021 10:53

I’ve always been happy with Photonic Universe 

Buyer beware on Amazon - maybe knocked up by a 10 year old in Mumbai sweatshop!

SleafordQuin replied on 08/11/2021 10:57

Posted on 08/11/2021 10:47 by AndyJF

Wow that's expensive. Do you really get 175W out of that panel?! I think 10W or 20W is sufficient to charge the battery. 

Do you need that power to run appliances directly off the panel?

 

Posted on 08/11/2021 10:57

Cost me £590 fitted. I was recommend the 175 w as it is good even in low light.  Mine also has a battery maintainer for the starting battery.  The guy that fitted mine explained it like this. even when you have a solar panel all 12v dc appliances still run from the battery the solar panel replaces the energy that is drawn out the battery.

SeasideBill replied on 08/11/2021 10:58

Posted on 08/11/2021 10:47 by AndyJF

Wow that's expensive. Do you really get 175W out of that panel?! I think 10W or 20W is sufficient to charge the battery. 

Do you need that power to run appliances directly off the panel?

 

Posted on 08/11/2021 10:58

No, nothing like. Work on best case scenario of 65Ah for a UK based 100w panel in completely ideal circumstances e.g. mid june, sunny day, south coast, panel perfectly aligned. In reality you’ll get a fraction of that e.g. mid winter in Scotland will get you a max of about 5Ah per day. Go for at least a 150w panel.

SleafordQuin replied on 08/11/2021 11:00

Posted on 08/11/2021 10:58 by SeasideBill

No, nothing like. Work on best case scenario of 65Ah for a UK based 100w panel in completely ideal circumstances e.g. mid june, sunny day, panel perfectly aligned. In reality you’ll get a fraction of that e.g. mid winter in Scotland will get you a max of about 5Ah per day.

Posted on 08/11/2021 11:00

pretty much what my fitter told me as well

SeasideBill replied on 08/11/2021 11:16

Posted on 08/11/2021 11:16

Andy, if all you want to do is keep a caravan leisure battery topped up over winter, you can simply buy a portable kit with a couple of crocodile clips for the battery. The solar panel will work behind glass/perspex but less efficiently.

SeasideBill replied on 08/11/2021 11:24

Posted on 08/11/2021 11:15 by AndyJF

Is that product I linked to a waste of money then?

 

Posted on 08/11/2021 11:24

You asked a couple questions…. if all you want to do is trickle a charge a battery something like the product you highlighted will do the job. As for reliability, who knows? Buy cheap, but twice?

The second question was about power output and running appliances which is a different ball game as I’ve tried to illustrate.

AndyJF replied on 08/11/2021 12:26

Posted on 08/11/2021 11:24 by SeasideBill

You asked a couple questions…. if all you want to do is trickle a charge a battery something like the product you highlighted will do the job. As for reliability, who knows? Buy cheap, but twice?

The second question was about power output and running appliances which is a different ball game as I’ve tried to illustrate.

Posted on 08/11/2021 12:26

Thanks yeah all I want to do is trickle charge the battery. I just wondered if a 175W was overkill for that purpose, but from what you've said, the one I linked to is adequate. It's only £34 so it's not a fortune even if it does fail.

 

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