All the products (dual battery kit and SBI dual battery isolator switch) available through this site have been used by us personally and proven through application to be good products that truly do what they are supposed to do. You will find videos and directions for using these products as we have used them.Our hope is to actually make the DIY’s life a little easier as we go. Or to possibly provide convenient products (dual battery isolator switch) to some of the smaller shops around the country so that they can, in turn, offer the related services of installation and use of these products.