| Electronics > Projects, Designs, and Technical Stuff |
| looking for a way to connect a pv grid, the main grid, and the house wiring. |
| (1/2) > >> |
| kripton2035:
let's assume I have a 1kW PV array, and a grid subscription of 6kW. I'm looking for a device that would switch between the PV or the grid to the house wiring the PV would be prioritary, so for all low power devices with less than a total 1kW the PV would feed. if I switch a more hungry device, the device would switch to the grid. there must be no interrupt time during the switch. bonus: the device could still feed the 1kW from the PV plus the kW needed from the grid when let's say a 2kW device comes on, the PV feeds 1kW and the grid 1kW. thanks for any hint. |
| kripton2035:
more bonus: the device should charge an expandable array of batteries. |
| Monkeh:
Your magic search terms are: Grid-tie inverter and battery backup. |
| station240:
It's called a hybrid inverter. Takes say 48V input (batteries), PV input and AC input (main grid). Output is AC. Batteries can be charged by any of the 3 inputs. |
| kripton2035:
will it work with a very small battery (as it is the most expensive part of the system) I have very rarely power outage, I only want to use PV when there is sun or light, and grid otherwise. for a 5KWh system, a simple PV with controller is around $7000, and with the batteries it comes to some $15000... I could buy the PV+controller and small battery first, and then eventually later buy some batteries to have some spare energy. |
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