Your Solargis account username is same as your email address.
To use Solargis services with a new email address you will have to create a new user account with a new email address. Once you have created a new account, you can request a transfer of iMaps, pvPlanner, and pvSpot subscriptions from the old account to the new account.
Bookmarks can be transferred from old account to new account using the following steps:
Please note that for the moment it is not possible to transfer purchase history from your old account to the new account.