As we've grown as a company, we've become better at communicating through our reseller partners that Solar Analytics is a software subscription service (that's a roundabout way of saying that we've sometimes been a bit crap at that). All our Solar Analytics users are on a paid subscription from the moment of installation.
You can see exactly what kind of subscription you are on in the My Subscription tab on your Dashboard (i.e Refer to the screenshot below to locate it). This will generally either be Lifetime or One Year - both of which your reseller has paid for on your behalf. Alternatively, you may be on a 30 Day trial.