The ampacity of the busbar refers to how much current the main panel busbar is rated for, and this can be found on the label of your main panel.
Commercial-scale battery energy storage systems (~100kW+ nominal power output) and utility-scale battery energy storage systems (~1MW+ nominal power output) are a rapidly growing sector of the variable renewable energy landscape.
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There are two ways in which three phase systems can be configured: Delta and Wye. In wiring diagrams of these configurations, you will see that the names are aptly given as they resemble the shapes of the characters the names were derived from (Δ, Y).
For average highs up to 100 F and lows down to 0 F, both the IQ7A and IQ7+ would work. The IQ7 will not work as Voc is exceeded and IQ7X will not work as Isc is exceeded by the module.
The BYD H10 is a high voltage battery (409V), you'll want to pair it with a high voltage inverter. We carry Solis inverters for high voltage storage systems.
Hybrid inverter selection will depend upon battery voltage. For low voltage batteries (~12-48V) you'll want a low voltage inverter The Sol-Ark hybrid inverters are a popular option for 48V systems.
The Sol-Ark line of inverters, including the 12K, will function as a grid-tied battery backup unit and do not require the addition of Solar PV.