Full disclosure, I'm a eufyCam owner from the original kickstarter. I love my set.
$290 for two Solo Pro (not sure which exact model, looks like the E40 - details below - usually $130) and 2 solar panels (~$40 each at lowest)
So, 130x2 + 40x2 = $340. Realistically saving about $50 for a complete wireless solution for cameras. These run on Wi-Fi so make sure you have a network for them.
Hope this helps some people!