The nostr:npub1lrjgpa9m2dl6esdah5pq7m005ymwh4glq4aet76q2zlz2f83esfsa2zvrj S9 space heater build is a great way to monetize your surplus solar electricity. You can be profitable at $0.03/kWh. You're not going to make a ton, but you should be able to stack 60,000+ sats per month.