Your text defines an electronic payment system as an alternative cash or credit payment method using various electronic technologies to pay for products and services in electronic commerce.

你的文字界定了电子支付系统作为一种替代现金或信用卡付款方式，运用各种电子技术，以支付产品和服务的电子商贸。

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Mark Matthews, one of the designers of the Power on Demand system, says the system is being tested for use as an alternative to the more expensivge diesel generators now being used in various military locations.

FORBES: Power Opportunity for GE, et al: How To Store Wind/Solar Renewable Energy