The current sharing capabilities allows you to share everything at an organisation level. You can share individually share:
Solar Farms
Reports
Task Lists
You can share a solar farm without having to share any reports or task lists
You can share a solar farm + 1/multiple reports
You can share a solar farm + 1/multiple task lists
You can share everything
Also Important:
Solar Farms can only be "shared" from the analyst portal, adding "Interests" to the Solar Farm
Reports can be "shared" both from the client portal or the analyst portal
Task Lists should be shared from the client portal