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I self installed the entire HIS including solar and the LG battery. Happy to help if needed. The LG battery is at a great value right now (wish it was LFP vs NMC chemistry but you can't argue with the price).

Look at your inverter label. The date code (used for M professional) is different from the PIN which should also be on the label.

@tearitupsports Got my DIY install up and running with solar and the LG battery. Have you had success getting it registered with the DeltaSolar app? I have found I can monitor via https://delta-solar.vidagrid.com with using the S/N and pin as login but the webapp is pretty terrible.

Nada (https://www.nada.org/regulatory-compliance/irs-reopen-time-sale-reporting-2024-transactions) seems to only point to 2024 transactions but just wanted to point out that at least for my case, 2025 purchases can be submitted late as well. Purchased: 3/18/2025 Form completed and accepted...