Invergy

Search 'find-and-update.company-information.service.gov.uk' for the trading name. Look at incorporation date, current status (Active vs Liquidation/Dissolved), most recent accounts filing, and director list. A long-trading limited company with up-to-date accounts is a safer signal than a recently incorporated firm.

Yes — three quotes is the UK standard. Use EnergyRanked's London filter to compare Invergy against other local installers on rating, review count, and accreditation. Don't just chase the cheapest quote; compare warranty terms and brand specs side-by-side.

Invergy's website (invergypowersupply.com) typically lists their service categories, recent case studies, panel and inverter brands they install, and contact details. Cross-check against their Google listing — discrepancies between the two are a useful sanity check.

UK solar workmanship warranties commonly run 5–10 years; panel performance warranties 25 years; inverter warranties 5–12 years. Ask Invergy specifically what's covered, who underwrites it, and what happens if they go out of business (an MCS Insurance Backed Guarantee — IBG — covers this scenario).

Lead times for Greater London renewables installers swing seasonally — late spring and early summer are peak demand. Ask Invergy directly for current scheduling once you've got a written quote. Plan for 4–12 weeks from deposit to install on a typical residential project; complex roofs or DNO upgrades can extend that.