Warranties play an essential part in inverter alternative and inverter value too. With an emphasis firmly on defending the atmosphere by finding extra efficient ways of producing energy, many properties and companies can play their half by installing solar panels. The price vary for installing solar panels for a 4-bedroom home averages $15,000 to $50,000. Typical set up prices for a domestic grid-connect photo voltaic pv set up will range from around _3,500 to _7,500 together with 5% VAT. With high efficiency panels you'll be able to fit extra kWp onto a restricted space than with standard effectivity panels but the cost per kWp will go up. The solar panels - Fine quality, high effectivity panels from a well know manufacturer are going to price more than a typical efficiency, commonplace high quality panel. The solar inverter - Using energy optimisers, micro inverters or a high model like SMA will probably be costlier than utilizing a regular brand string inverter. These will all add to the cost of the system, nevertheless they could result in a system that meets your specific needs higher.