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Balcony Solar Takes Off in Germany as Storage Prices Slide and Rules Clarify

Low-cost modular batteries return to retailers, with legal guidance emphasizing registration, safety risks, and glare limits.

Overview

  • Under Solarpaket I in force since May 2024, plug‑in mini‑PV systems may use up to 2,000 Wp of panels with a maximum 800 W grid feed‑in.
  • Owners must register installations in the Bundesnetzagentur’s Marktstammdatenregister within one month of commissioning at no cost.
  • Tenants and homeowners generally have a claim to install, with lawful exceptions for structural safety concerns and disruptive glare, and court rulings on glare thresholds vary.
  • An 800 W setup typically produces about 4–5 kWh per day depending on season and model, with kits offered for a few hundred euros and reported payback times of roughly two to three years as installations approach about one million nationwide.
  • Growatt’s NOAH 2000 storage unit is back in stock at ACTEC at about €467 per 2.048 kWh block, featuring LiFePO4 cells, IP66 weather protection, and Shelly smart‑meter support for zero‑export, with bundled PV+storage sets advertised from €800.