RFT supplies Tritium whom supplies IONITY, page-21

The EBITDA/Revenue margin has been around 11% in the past but may improve on higher volumes. Interest expense and Depreciation are minor. So it all comes down to what is your estimate of sales and the P/E to apply.
It's all pie in the sky but I'm estimating sales of $10.5m for the year just finished, $$25m in the year underway and say $40m in 2019/2020. Applying a 12% margin, 25% tax rate and P/E of 25 would see the share price rise to 4 cents based on 2019 and 6.3 cents in 2020.
It may go to 6.3 cents and higher sooner if you subscribe to the view that the market looks 18 months to 2 years ahead and at some stage excessive optimism will push it above value.
The sales estimate is obviously the rubbery part of the calculation. Not even sure if the RFT plant in Malaysia can accommodate such a big increase in sales without capital expenditure. Hopefully it can and more.