Crown Solar Energy — Inverter Product Update

Added five supplied inverter product images and matching product explanations to inverters.html:
1. Growatt
2. Huawei
3. Inverex Nitrox
4. Knox Max II 10kW
5. Solis

The product presentation uses equal image/text columns on desktop, stacks cleanly on mobile, and uses contain-fit image framing so supplied product images are not cropped.