Is A Home Battery Worth It? What the Real Numbers Look Like in Thailand
Most battery ROI calculators price the battery alone and use a grid-rate arbitrage spread — and both assumptions understate the real case. Using actual installed costs from Thailand and a household that expanded its solar-plus-battery system to charge an EV at home, this piece shows a payback period of 2.3 to 2.5 years, well ahead of textbook estimates.