Honestly I have never done 10 gallons batches but the best investment I made was Beer Smith 2. Beer Smith will scale batch sizes for you and adjust everything accordingly.
I too can't wait to hear a response to this. Does a heating element need a delay like a fridge compressor does, so it doesn't burn out from turning on and off all the time? This would be the only reason I could think of as to why it would fluctuate so much.
Maybe batch sparged is the wrong term. I raised the grains out and used my heated sparge water to fill up the grain canister and let it filter out. I didn't fly sparge or use a method like that. Sorry still new to all grain.
I should also add, I hit just over 79 percent efficiency as well with this set up. I batch sparged and then used the wort from the kettle to rinse a few times over. I used 13.5 pounds of grain and hit 1.068 on my hydrometer. Over all I'm happy with those numbers for how simple this setup is to use.
I took a shot at brewing this Thursday night on my new Mash & Boil electric kettle. I didn't have hop shot so I added extra Citra and Simcoe at the beginning boil. Also used a white labs London ale liquid yeast but fermentation didn't seem to take off so today I pitched a wyeast 1318. I'm also...
I got this over a month ago and finally got to use it tonight. Overall it's works pretty damn well for a 1600 watt system. I'm brewing inside since there is 24" of snow outside right now and I was able to bring 6 gallons of wort to a boil in about 30 minutes. It did however seem like an eternity...
I have not seen the GF up close and personal, just what I've read online. I will grab a pump eventually to recirculate, but I'll start with using it as intended.
I grew up in Bloomsburg and it's still a great little town and the college is a great school. I was just on campus today actually...
So I broke down and purchased this tonight. Might be a few weeks before I get to use it, but kind of excited to do so. If this works well, it will be perfect for my bar/brewery area. If not I guess it will sit on a shelf with my other equipment to collect dust.