Keep back e.g. 10 % of potential production for load balancing. (planet3.org)
Resources that do not help with load balancing may be a good selection at times and have a place in the generation mix if they have other positive characteristics. (judithcurry.com)
With this, you can easily load the balance that you might have on one credit card to either another credit card or to your bank account, and close the debt. (credit-land.com)