Excellent for keeping engine battery alive from solar/leisure battery.

Does the job. Is keeping the starter battery healthy from the solar panels.

This is the best bit of kit that I have bought for the price. Wired it in and it instantly started working. Now when I have it on electric hook-up it keeps both batteries charged up. Very pleased with it especially for the price.

I had installed a solar system for my leisure batteries but as we've not got out much this year, my starter battery went flat - this little gizmo allows the energy from the solar to also trickle charge the starter battery. 12Vplanet were ace - delivery was before expected date - all good, added to my favourite vendors and would recommend.

This is the second one I have bought for our campervans. They appear to work well, keeping the starter battery charged. Obviously it all depends on the size of each battery and if the inbuilt charger is switched on. So, in summery as long as the charger is on then the starter battery will receive a TRICKLE charge.

Works very well and easy to install, using on motorhome to keep cab battery charged

This allows the Solar panel to charge the Leisure battery and a lesser amount of charge is diverted to the Starter battery.
Very useful to maintain starter battery, with the vehicle alarm and tracker systems draining down the Starter battery. Good product, great idea.

The service 12volt planet gave was excellent. Order arrived quickly and they were very helpful over the phone giving me advice as I needed it.Would highly recommend

This is a very effective piece of equipment.
I supply and fit these a lot for my clients as a means to keep their starter batteries full of charge when parked up off grid.
Excellent device.

A simple device which works without intervention to 'share' any excess voltage in the leisure battery with the starter battery which often has a small voltage drain owing to the vehicle system's requirement. Fitting very simple - connect (via 10amp fuses at each battery connection point), to both leisure and starter battery positives with a 1.5/2.5mm single cable. Ideal where the vehicle is not being used during long stationary periods. Thoroughly recommend the device - a simple, zero-maintenance and effective solution.