Q: How do solar PV systems and energy storage work together?

A: This downloadable fact sheet provides an overview of battery basics and other useful information: http://www.nrel.gov/docs/fy02osti/31689.pdf

Q: Why is Charge! focusing on Lithium ion batteries and not lead-acid?

A: Charge! Energy Storage is developing a proprietary patent-pending battery management system/charge controller (BMS/CC) device that is specifically designed to maximize Lithium Iron Phosphate (LiFePO4) batteries – which is a member of the lithium ion family – and increase its performance features.

As the chart below points out, lithium ion’s main advantage are high power and energy densities and high efficiency.  Its disadvantages are high production costs (which have to be passed on to end-users) and the requirement of special charging circuits.  Our BMS/CC increases the performance characteristics of lithium ion batteries and thus lowers the total cost of ownership.



Q: What is the difference between energy and power?

A: The easiest way to think about this is power is measured in watts and energy is measured in watts over time or watt hours.  This link provides a great explanation: http://www.pvstudent.com/Power-v–Energy.html