The LONGi label photo yields the exact model (LR4-60HPH-370M) and its
electrical figures. The voltages nearly settle the DC/AC split on
their own: ten panels in series reach 409 V, beyond the 250 V MPPT
ceiling but inside the Fronius MPP window, while the MPPT tops out at
five-panel strings. Fixed deck to MPPT as 2x5, sliding deck to
Fronius as 1x10, one conductor pair through the flexible link.
First numbered estimate for the solar roof: 20 LONGi 370 panels at
about 19.5 kg each plus fixed rails, the self-supporting sliding
frame (aluminium mandatory, steel would double it) and cabling land
around 650-700 kg. Recorded in the weight tracker and the roof
concept doc with the structural and centre-of-gravity implications.
Deep regulatory research (15+ official sources, RTI 03.8.3 sheet read
in full): the TCP-to-VASP procedure is nailed down (13-item dossier,
seat reduction handled inside it, 86.90 EUR), but two blocking
uncertainties surfaced. First-registration date may forbid the
conversion or require a ministerial derogation, and no firm text
covers the sliding solar deck. Both flagged as blocking questions in
parcours-vasp.md and solaire-toit.md: DREAL first, fabrication later.
L'électron rare