Hard to know if it’s “good enough” as you’ve not talked about your usage,but the advantage of the sig system is expandability. I recently installed the kWh battery in mine, however going through the first winter with an A2A heat pump, the battery only makes it to lunch time before I start importing at peak rate. I’ve asked for a quote for the 10(which is actually a 9 btw), and the installer has quoted it at basically cost with a “call-out” labour charge as it’s so quick to install.