How Battery Storage Systems Can Deliver a Strong Return on Investment (ROI)
How Battery Storage Systems Can Deliver a Strong Return on Investment (ROI) If you’ve already invested in solar panels — or you’re thinking about it — the next logical question is: “Are batteries worth it?” As someone running a home with 26 solar panels and 50kWh of battery storage , plus charging an electric boat from it, I’ve had plenty of time to look at this properly — not just from a green perspective, but from a financial one too. Let’s break it down. 1️⃣ Time-Shifting: Buy Low, Use High In the UK, electricity prices vary dramatically depending on the time of day. With tariffs like those from Octopus Energy , you can: Charge batteries overnight at very low rates Use stored energy during peak daytime hours Avoid expensive early evening tariffs If you buy electricity at 7p/kWh overnight and avoid paying 28–35p/kWh at peak times, the maths becomes compelling. That difference — multiplied over thousands of kWh per year — adds up fast. 2️⃣ Maximise Your Sol...