Turner said their device helped "keep all that solar power inside your house".
Work on the invention started about two years ago, when workmates Turner and Murdoch played around with a prototype at Turner's house in Havelock North.
Lazelle has since joined the team and they were accepted onto a startup programme earlier this year called the Orion Energy Accelerator, which helps startup companies get off the ground.
At the end of the programme last week, the business was awarded a $15,000 grant and a top accolade for Most Innovative Solution.
Turner said they now wanted to launch their product in six months' time.
"We will be ready in six months to deploy," Turner said. "We are predicting we will be installing about 100 of these a month."
Turner said they had been speaking with big solar installers in New Zealand and there was demand for the product.
He said in recent years solar panel systems had been growing "exponentially" in New Zealand.
"New Zealand has this 60-year-old power grid and there are a lot of people installing solar on their roof."
Orion head of customer and communications Paul Deavoll praised the work of Red Phase Technologies and its product.
"At scale, getting 10 per cent more out of your solar panels not only saves money for consumers but has a massive knock-on effect on New Zealand's energy footprint."