03-26-2014, 02:39 PM
I believe 60V systems might actually be more common than 36V.
A direct-drive inverter only works in a grid-tie configuration; as the PV harvest fluctuates, there's no way for the inverter to add/drop load to match the available power. Something has to buffer the difference, even if it's a very small buffer.
Counterexample: modern DC fridges (Steca, others) that are designed to be connected directly to a solar panel have variable-speed compressors with a controller that spins them up or down based on the input power.
A simple system would consist of: solar panel(s) - disconnect breaker - charge controller - battery - inverter, all wired to each other serially (and in that order).
A direct-drive inverter only works in a grid-tie configuration; as the PV harvest fluctuates, there's no way for the inverter to add/drop load to match the available power. Something has to buffer the difference, even if it's a very small buffer.
Counterexample: modern DC fridges (Steca, others) that are designed to be connected directly to a solar panel have variable-speed compressors with a controller that spins them up or down based on the input power.
A simple system would consist of: solar panel(s) - disconnect breaker - charge controller - battery - inverter, all wired to each other serially (and in that order).