This is what I'm looking to do as well, but bigger. With my setup, it's 4 heat sticks, 2 for the hlt and 2 for the boil kettle, 4.5kw each, so at 230v that figures to 25 amps per stick, right? In terms of buying SSRs, does that mean I need four 25 amp SSRs, or can I get by with two 50 amp SSRs? For the total load, if I'm running the boil kettle and the HLT at the same time, does that mean the whole system will draw 100 amps? (calculations include 80% safety thinger mentioned above) Should I just never ever have both turned on?