Ring Automotive RSP600 Solar Maintainer 12v 6watt £19.99 @ Argos on eBay
31°Expired

Ring Automotive RSP600 Solar Maintainer 12v 6watt £19.99 @ Argos on eBay

£19.99eBay Deals
7
Found 19th Jun 2015
This is the biggest of the Ring Solar maintainers, full price seems to be 50 or 60 depending on where you look. Amazon have it for £40, Go Outdoors seem to be the next cheapest at £34, possibly plus P&P so a decent saving.

12 volt, 6.0 watt solar powered battery maintainer for car and leisure batteries.
Complete with mounting screws (presumably for the roof of a shed or something?)
12V DC power plug (cigar lighter)
Battery clips
Nice long 2.7 metre lead
Can be left connected overnight.

They call these battery maintainers rather than chargers as the output is fairly low and obviously varies with light. The idea is that if you have a car that you regularly park up for a few weeks, you plug this in when the car has just been parked (so the battery has a decent level of charge) and these work to undo the natural discharge of the battery / your alarm and immobiliser.

These will work when it's overcast, and through glass, though obviously max output comes when they are outside and it's sunny!

A couple of other things to note:
The cigar lighter attachment only works if your vehicle has a live all the time cigar lighter.

Ring are a little cheeky when they describe it as waterproof as they state in the manual that you have to seal around the edges of the panel with silicone for it to be used outside!

It's fairly large, for an idea, around twice the size of a laptop.

There is no light or anything to indicate that they are working (I guess that would just take from the charge current).

I bought this for my old Porsche 944 which is currently living outside and has suffered head gasket failure so isn't getting a regular run to keep the battery charged.
Mine has just arrived, so I'm not sure how good they are, but comments online seem to suggest they do what is intended.

7 Comments

No good! Had it from Halfords some time ago; If pluged in to cigar lighter socket, central locking won't allow to lock my car.So whats the point? Returned to Halfords and they said they know this problem,as many who bought-returned them because of that.
Also,charging at 49 mAh at sunny day,so even AA battery will take ages to charge and I don't think 49mAh is enough to keep car battery charged...
Useless gadget.

Edited by: "Rimi" 19th Jun 2015

Rimi

No good! Had it from Halfords some time ago; If plunged in to cigar … No good! Had it from Halfords some time ago; If plunged in to cigar lighter socket, central locking won't allow to lock my car.So whats the point? Returned to Halfords and they said they know this problem,as many who bought-returned them because of that.Useless gadget.


Could be useful with other applications. Caravan, boat etc.

I think it has been reported previously that these can discharge a battery too (eg on a cloudy day) unless modified.

Original Poster

Rimi

No good! Had it from Halfords some time ago; If pluged in to cigar … No good! Had it from Halfords some time ago; If pluged in to cigar lighter socket, central locking won't allow to lock my car.So whats the point? Returned to Halfords and they said they know this problem,as many who bought-returned them because of that.Also,charging at 49 mAh at sunny day,so even AA battery will take ages to charge and I don't think 49mAh is enough to keep car battery charged...Useless gadget.



I guess the central locking is specific to your car (might be worth mentioning to others what it is to avoid this issue).
I'm using the clips direct to the battery - battery is in the boot of my 944 and the boot is electronically opened, so all I need is enough juice to get it open for jump leads if need be!
The box claims up to 343mAH rate (at 17.5v).
I'd say a 50 milliamp drain due to a security system is an over estimation so it should at least prolong.
As I said in the original post, this isn't meant for charging a battery, more for cancelling out the discharging.

If it is indeed useless, I can be happy in the knowledge that I bought the biggest on the range for the cost of the smallest

fairytooth

I think it has been reported previously that these can discharge a … I think it has been reported previously that these can discharge a battery too (eg on a cloudy day) unless modified.

yep you need to add a led inline to the positive + red line

Edited by: "_Rappy_" 19th Jun 2015

I wouldn't install an LED, just a normal diode if it hasn't got one installed.

Most of these have a vanity LED anyway to show that its doing something and on some it will even light up in the dark if it hasn't got a blocking diode installed, draining the battery thanks to reverse charging. In short *most* of these types of trickle chargers are useless but this one looks large enough to possibly maintain a fully charged healthy battery.

If you're looking for something to maintain a battery with the option of charging it from a discharged state you would be best off with a 20w Poly/Monocrystalline panel and a cheap 10amp charge controller, it can be done for under £30. With that its more useful putting at least an amp into the battery in full sun and also protecting against over charging. Ideal for those with an expensive Campervan that has a high drain GPS tracker installed.

Original Poster

Thought I'd come back and add that nearly 4 weeks later (and certainly 4 weeks since the car had been started) my car (which is a 3 litre 4 cylinder that needs a fair bit of cranking to start) coughed over happily having sat outside with the maintainer sitting in the back window, connected directly to the battery. The battery wasn't fully charged when I parked it up either, having done 2 5 mile journeys to and from work a few days previously.
Also, the battery has been known to go flat in 7-10 days presumably due to the ancient alarm / immobiliser.

I didn't do any modifications as mentioned above, just straight out the box
Post a comment
Avatar
@
    Text