# Cross-Check Results

Date checked: 2026-04-13

## Confirmed

- Current Irish EV-style tariffs are much more favorable for battery arbitrage than ordinary smart tariffs.
- Dynamic tariffs are not yet in the Irish retail market, but they are scheduled to arrive by June 2026 for obligated suppliers.
- Domestic battery installs face REC, certification, and ESB Networks notification requirements.
- The public grant structure is solar-PV centric, not battery-centric.

## Corrected Or Reframed

- The business should not be framed as "home batteries are broadly attractive in Ireland." It is narrower: "home batteries are conditionally attractive for a subset of smart-meter EV households."
- Battery-only payback should not be compared to solar PV payback as if they were the same product. Batteries add cost on top of a system that already has admin and certification overhead.
- Retail battery pricing should be split into integrated-BMS modules, external-BMU stacks, and all-in-one systems.

## Model-Killing Uncertainties

- Dynamic tariffs arrive and compress the current EV spread faster than expected.
- The customer base willing and able to move to the best tariff class is much smaller than the current smart-meter population.
- Installation/compliance overhead pushes all-in cost above the threshold where payback looks acceptable.
- Imported hardware support, firmware, and warranty handling create a margin sink rather than a moat.