Most domestic solar PV systems will generate more energy during the day than is used. This surplus energy is usually sent to the National Grid automatically so you may not even be aware that it's going on. The Solar iBoost+ interrupts this process, enabling you to use more of your free solar energy while you have it. The Solar iBoost+ Buddy is a monitoring display and is an optional part of the system. It is an 'eco-gauge' which connects to the Solar iBoost wirelessly showing you when your Solar iBoost+ has detected surplus energy is available to use, when it is active and. Simple to Install A Solar iBoost+ is simple to install next to your hot water tank as it is wired to your existing immersion heater (up to 3kW). The Solar iBoost+ Controller and Sender communicate wirelessly so there is no need for cables between them. If you have 2 immersion. No, a Solar iBoost+ will have no impact on your Feed-in Tariff, and here's why. Peak generation for solar PV systems is obviously during the day when many homeowners are out. This often means energy is being used to keep appliances on standby but not a lot. The total cost of a Solar iBoost+ is likely to fall between £250 – £300 but this will vary depending on your supplier and doesn't necessarily include.