Frequently Asked Questions

A solar PV (photovoltaic) system paired with battery storage is one of the most effective ways for UK households to cut energy costs, gain energy independence, and reduce their carbon footprint in 2026. Solar panels generate free electricity from sunlight during the day, while the battery stores any excess for use in the evening, at night, or during cloudy periods. This combination significantly boosts self-consumption (using your own power instead of buying from the grid) compared to solar panels alone

•  Higher self-consumption: Without a battery, typical homes use only 30–50% of the solar electricity they generate (the rest is exported to the grid at low rates). A battery can push this to 70–90%, meaning you rely far less on expensive grid power.

• Real-world savings: A solar + battery system can reduce electricity bills by 70–90% on average. One 2024–2025 study of over 150 UK installations showed 86% average savings. For a typical 3–4 bedroom home, this often translates to £765–£1,680 per year in combined bill reductions and export income (depending on system size, location, and usage)

• Peak-time avoidance + smart tariffs: Batteries let you store cheap/off-peak or solar energy and use it during expensive peak hours. They also pair brilliantly with time-of-use tariffs (e.g., Octopus Flux or Agile), where you can charge from the grid cheaply overnight if needed.

•  Power during outages: A properly installed hybrid solar + battery system can keep essential appliances (fridge, lights, Wi-Fi, heating controls, or even an EV charger) running for 6–15 hours (or more with a larger battery) during grid blackouts — something solar panels alone cannot do reliably

• Protection against price rises and supply issues: You lock in your own energy supply, shielding yourself from future electricity price hikes (which have been volatile in recent years). This is especially valuable for homes with heat pumps, EVs, or high evening usage.

•  Under the UK’s Smart Export Guarantee (SEG), you get paid for any surplus electricity you send to the grid. Rates in 2026 range from around 6–15p/kWh for standard tariffs, up to 20–25p/kWh on premium or installer-specific deals (e.g., Good Energy, Octopus Intelligent Flux, or EDF/OVO exclusives)

• A battery gives you control — you can store power and export strategically (e.g., during high-price windows on dynamic tariffs) instead of exporting everything for free or at low rates during the day.

• A typical home solar system avoids around 1 tonne of CO₂ emissions per year (equivalent to driving ~3,600 miles in a petrol car).

• Adding a battery maximises the use of clean, renewable energy and helps the National Grid by reducing peak demand and supporting the UK’s net-zero targets.

•  Payback period: A typical 4–5 kW solar + battery setup often pays for itself in 7–11 years. After that, you enjoy decades of near-free electricity (panels last 25–30+ years; batteries 10–15+ years with warranties)

• In summary, a solar system with battery storage in the UK offers strong financial returns, energy security, and environmental wins — especially if you have high daytime generation + evening usage, plan to stay in your home long-term, or are on (or can switch to) a smart/time-of-use tariff. Savings and payback vary by roof orientation, location (south of the UK gets more sun), household consumption, and exact system size, but 2026 data shows it’s one of the best home investments available