In general, there is no limit to the amount you can invest in a non-RRSP+ account. With the Fonds de solidarité FTQ you will get 30% in tax savings.*
*The tax credits granted to the shareholders of the Fonds are 15% at the federal level and 15% at the provincial level. Tax credits are capped at $1,500 per tax year, which corresponds to purchases of Fonds de solidarité FTQ shares having a value of $5,000.