Never heard about Powerledger and i will definetly check it out !
It makes me think about Envion who wants to make profits with mining through renewable energy. I agree for Stellar and NEO, if you wish to know my opision about them you can find it on my post: https://steemit.com/crypto/@avre/my-wallet
RE: Best Cheap CryptoCurrency to Invest in 2018 (Part 1)