Hi
I have two sterling desulphation units fitted, one on the starter battery and one on the domestic bank. Looking at the earlier relevant clicky link the similar units available seem cheap (in money terms) as I paid around £51 each via chandlers.
Cant say how good they are just yet, but they are silent and the led when lit means they are active (they only kick in around the 12.8 volt mark).
Just recently, one of the units led indicator has failed to illuminate. I emailed Sterling on monday to ascertain if there is anyway to test the unit to see if it is dead or just the led bulb that has failed. No reply as yet, so wondered if any members can suggest how to test these units with a multimeter. The blurb states that they work by pulsing a high pitched radio frequency into the battery to desuphate the plates.
Thanks in anticipation.