Today it was Labour's turn. And they've announced the same core policy - the Ratepayer Assistance Scheme - backed up with additional loans through lines companies, support for community batteries, and support for renters to get plug-in solar. Which is all good, and unlike National there's no doubts about implementation. Labour will actually do what it promises, at least if there's still a public service to do it with. Not least because their expected coalition partners, the Greens and Te Pāti Māori, will hold them to it (and push it further).
Speaking of the Greens, while they haven't yet announced their solar policy, their 2023 version was twice as generous as Labour's. I'd expect them to be starting from that baseline, and then adding on extra support for renters and community ownership. In the meantime, they're pointing out that with the three largest parties in parliament all supporting the Ratepayer Assistance Scheme, the House can and should just legislate the required tweaks to allow it to be used for solar, rather than making people wait until after the election. But then, that might make National actually deliver on their promise, rather than treating it as a meaningless soundbite.