The installation kit is offered for sale if you need an additional kit because perhaps you changed RV's, and took your SoftStartRV to the new RV...
This kit is offered FREE with every SoftStartRV.
You do NOT need to buy this with your initial SoftStartRV purchase as it is included in the box.
Buy this ONLY if you need an additional kit - or two - to the one(s) supplied.
UPS Ground Shipping is Free.