WePower and Power Ledger are both great projects, but they operate at different scales.

Power Ledger is providing a peer-to-peer trading platform for micro-grids, for people to sell their own excess energy from renewable sources on a market place that provides energy buyers with cheaper energy. The POWR token will also allow people to obtain equity in renewable energy assets (e.g. solar power plants or wind farms).

WePower operates at a larger scale. They will help people who want to build renewable energy assets sell their future energy at a discounted price before the asset is constructed. The capital raised by doing so will be used to fund the construction of the energy asset. Those who buy discounted energy can either trade it before/during construction, or can use the discounted energy once the asset is complete and providing power.

Both projects are awesome and the crypto community should get behind both. They are both crowdfunding renewable energy projects to help build a better world.