Hi Dave and thanks for all that info, and while I agree with most of it, the difference between what you get in the way of available accessories battery capacity is quite a large amount more than you covered.
The advantages of using my systems is as you have posted, my systems are far gentler on the batteries, for the same amount of energy used, because my systems spread the load over at least two batteries.
But it doesn't end there.
Because my systems allow up to 50% of the cranking battery's capacity to be used to run your accessories, if you use the same amount of capacity as you would do with either a DC/DC unit or with Standard type Voltage Sensing Relay ( VSR ) Isolator, you will draw 50% less off both batteries and this has a number of very useful benefits.
Lets say you have a 100Ah auxiliary battery being recharged via a DC/DC device or Standard VSR.
You have a total usable capacity of 80Ah, which means your auxiliary battery will be discharged down to 20% ( the safe level for all types of modern deep cycle batteries ).
If you were to use the same amount of battery capacity with one of my systems, and say the cranking battery also has a 100Ah capacity, then the two batteries will only be discharged down to 60%.
Because all alternators in late model vehicles can easily charge two or more batteries at the same time, this means that when you do start your drive, you will need 1/3 less driving time to fully charge the two.
Plus each battery will not be charged with as high a current, which again, is kinder on the battery.
And if you need more capacity, you have the added bounce of having 130Ah available verses just 80Ah with the DC/DC or Standard VSR setup. And the additional battery capacity available at no extra cost and no extra weight or space lost.
Next, and Dave, this is one I disagree with you on. You can use dissimilar batteries in a parallel DBS setup and you will not have any problems that are different to problems you can have when using identical batteries.
Furthermore, my system can actually take advantage of different battery types and put that to use.
If you have a rapid charge battery like an Optima as your auxiliary battery, every time you turn off your motor, because the auxiliary battery is always going to be in a higher state of charge than the cranking battery, and because of the unique way my isolators work, the higher charged auxiliary battery is able to back discharge into the cranking battery.
This feature, over a short period of time after one of my systems is fitted to a vehicle, actually increases state of charge of the cranking battery. And this in itself has lots of benefits, like a healthier cranking battery, which makes it easier to start your motor and helps to increase the cranking battery's life span.
Babs, this is just the basics but as you can see, there is no other DBS that can match the benefits my systems offer. And this is not unsubstantiated sales hype, it's based on more than 25 years that my isolators have been in use.
