Over five weeks we tracked policy and data across six markets. Looking back, the signals converged into five judgements — not forecasts, but patterns drawn from what already happened.

1. Regulation is defining what a compliant product is.
Poland draws a capacity line at 10 kWh. The UK draws a safety line at installation location — lofts, bedrooms and escape routes are out, outdoor units need 1 metre clearance. Germany defines storage's role in markets. Australia sets a 5–100 kWh eligibility band. The policy focus has moved from "encourage installation" to "define what a good installation is." Compliance is no longer an entry ticket; it's part of the differentiation.

2. Growth comes from retrofits, not new builds.
Australia's attach ratio is 153 batteries per 100 new solar systems — above 100%, which can only mean existing solar owners are adding storage. Poland's subsidy targets households that already have solar. That changes the whole service chain: site surveys check existing inverters, designs account for existing location compliance, quotes include retrofit costs.

3. Markets are stratifying; one product line can't cover them.
Australia rewards install efficiency — high-voltage platforms, retrofit compatibility, fast commissioning. Europe rewards provable compliance — enclosure ratings, metering, protocols, bidirectional capability. Emerging markets reward reliability — backup, off-grid and hybrid configurations. These requirements conflict. A single universal model ends up strong in none.

4. Delivery certainty beats unit price.
Poland's window runs to October 2027 and closes early if funds run out. Australia's A$7.2B targets 2 million homes by 2030. Demand concentrates around policy windows, so delivery capability in the first 3–6 months decides channel partnerships. In subsidy markets, stockouts hurt more than a 5% price gap.

5. Service capability is now a pre-sale condition.
Compatibility lists, compliance documents, installation-location guidance, grid-connection paperwork — formerly "after-sales support" — now appear at the quotation stage. Whether you sell depends on proving it can be installed, approved, and delivered.

WHAT TO WATCH NEXT
Poland's first application data and fund burn rate; Greece's HEDNO requirements for plug-in solar and household batteries (subject to official publication); the UK's measurement conventions and retrofit scope; post-show moves in Australia — signings, local stock, certification progress.

Sources: pv magazine (Oct 2026); Smart Solar Homes; Virtual College; CEC (via PV Tech, 12 Oct 2026); Clean Energy Regulator; SAnews; South African Ministry of Electricity and Energy.

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