Some batteries are chosen from the Device Chooser as a unit of their own; others never appear there at all. One question decides which yours is: does the box output AC?
A smart battery — sold as an AC, AC‑coupled or all-in-one battery — has an inverter built into the case and outputs AC. Under G98/G99 that makes it a generating unit, so it must be chosen from the Device Chooser. Its register entry describes the inverter inside — the export kW, phase and protection the DNO assesses — so choosing your battery there isn’t mis-filing it as an inverter: it is an inverter too.
A DC battery outputs nothing by itself — it attaches to the DC side of an inverter and is never in the chooser. It is recorded as the Battery / Storage capacity on that inverter’s row.
The ENA register has no storage column — an entry carries the inverter’s figures only. The DNO forms do declare each unit’s storage, so the kWh is always entered by you, on the unit’s own row — whether the cells are built into the device or attached to it. (A Battery Only Inverter also takes the battery chemistry; a V2G charger takes the usable capacity of the largest vehicle it will serve.) The figure prints on the forms; routing reads only the inverter’s kW.
Not solar-connected. A Battery Only Inverter is a grid-charged battery — a smart battery, or a battery inverter with DC modules — with no PV attached: it charges cheaply during off-peak hours, then powers the premises (or exports) at peak. The Device Chooser offers the same devices under Solar Inverter and Battery Only Inverter — the register can’t tell them apart; the type records what charges the battery: solar, or the grid. Storage attached to a solar inverter is not “battery only”: it rides the Solar Inverter row as that unit’s storage figure and adds no unit of its own.
A microinverter system (Enphase IQ8, Hoymiles and similar) has a small inverter behind every panel. Each one outputs AC, so each is a Generating Unit with its own entry on the ENA register, at its own small capacity: an Enphase IQ8X is 0.38 kW. You do not enter twelve rows for twelve panels. Choose Solar Inverter, pick the microinverter once, and enter the Quantity installed. The Quantity field appears for a solar device of 1 kW or less.
CLRD judges the per-unit limits on the single microinverter and counts the whole system everywhere a total is wanted: the aggregate that decides the route, the wizard’s totals, and the forms, which print one row (“12 x Enphase Energy”, the device’s register reference, the system’s capacity). On a three-phase or split / two-phase supply a row sits on one line, so enter one row per line, each with the Quantity wired to it.
A microinverter has no battery port. On a microinverter row the Quantity takes the place of the storage figure, because there is nothing to attach a battery to: the panels leave the roof as AC. Storage in such a system is a separate AC-coupled device with an inverter of its own (an Enphase IQ Battery, for example), and it takes its own row. Whether that row is a Solar Inverter or a Battery Only Inverter follows the same rule as above: what charges it.