Home battery buying guides for the UK

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  Adding a battery to existing solar in the UK

  Check compatibility, the complete installed cost, realistic annual battery use and what to request in an itemised quote before comparing products.Read the general guide →
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  Powerwall 3 vs SigenStor vs SMILE-G3

  Compare exact configurations, existing-solar compatibility, the full installed quote and the assumptions behind payback.Read the UK comparison →
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  Tesla Powerwall 3: what determines payback in a UK home?

  Untangle the integrated solar inverter, your existing inverter, backup hardware and the incremental cost of adding storage.Read the Tesla guide →
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  Sigenergy SigenStor: how configuration and usage affect payback

  Read the Energy Controller and battery-module line items separately; examine why capacity alone cannot establish annual savings.Read the SigenStor guide →
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  AlphaESS SMILE-G3: what to check before estimating payback

  Distinguish S5 and B5 inverter models, then weigh avoided electricity purchases against the export income forgone when solar is stored.Read the AlphaESS guide →
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  GivEnergy All in One: warranty and quote checks

  Check the documented Gen 1 configuration, the manufacturer's administration, existing-solar fit and who would support your system.Read the GivEnergy guide →
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  Enphase IQ Battery 5P: existing-solar and quote checks

  Identify the original UK 5P, check the Gateway and metering route, then compare the full installed quote and warranty conditions.Read the Enphase guide →

These guides use published sources. Some include deliberately hypothetical calculations; the GivEnergy guide focuses on documented configuration, warranty and support risks, and quote checks. None is a market-price list, product ranking or buying recommendation. The calculator evaluates your inputs for an existing solar system; it does not identify or simulate a product.