I just stumbled onto this, and as far as I know, it is the first example of the new product class I have been pineing-for / predicting: https://m.huayu-solar.com/Content/uploads/2021694206/PDF/AC-Coupled-Quick-Installation-Guide.pdf
This AC-Coupled battery inverter being introduced by Huayu, the HYH-3K/3.6K/5K-AC, supports 2 CT sensors, one for incoming grid energy (grid load) and a second for incoming PV generation.
This should allow it to be programmed for zero-export by charging the battery with all excess PV generation beyond that needed to serve loads (so Pcharger = Psolar - Pload).
Here is a bit more detail about the 5K version: https://m.huayu-solar.com/ac-couple...r/5kw-lv-ac-coupled-solar-power-inverter.html
I’m hoping this product proves to deliver the capability I am hoping for and will be offered in configurations compatible with the US grid (single-phase 240V or split-phase 120/240V).
My current battery-system is DC-coupled but a smart battery inverter like this supporting zero export would allow me to use microinverters on my 1kW PV array, monitor that production through a CT sensor connected to this battery inverter, and program the inverter to consume as much of that 240VAC production as needed to charge the battery in order to maintain grid consumption at zero.
Dawn of a new era if I’m right about what this product represents…
This AC-Coupled battery inverter being introduced by Huayu, the HYH-3K/3.6K/5K-AC, supports 2 CT sensors, one for incoming grid energy (grid load) and a second for incoming PV generation.
This should allow it to be programmed for zero-export by charging the battery with all excess PV generation beyond that needed to serve loads (so Pcharger = Psolar - Pload).
Here is a bit more detail about the 5K version: https://m.huayu-solar.com/ac-couple...r/5kw-lv-ac-coupled-solar-power-inverter.html
I’m hoping this product proves to deliver the capability I am hoping for and will be offered in configurations compatible with the US grid (single-phase 240V or split-phase 120/240V).
My current battery-system is DC-coupled but a smart battery inverter like this supporting zero export would allow me to use microinverters on my 1kW PV array, monitor that production through a CT sensor connected to this battery inverter, and program the inverter to consume as much of that 240VAC production as needed to charge the battery in order to maintain grid consumption at zero.
Dawn of a new era if I’m right about what this product represents…