If you can run it safely at 1800W, you'll heat up your space too much. I haven't needed to run mine higher than ~800W to maintain mid-60*F temps. 

I have a simplex group for discussing solar stuff, if you'll allow me a shameless self-plug. 

https://simplex.chat/contact#/?v=2-7&smp=smp%3A%2F%2FUkMFNAXLXeAAe0beCa4w6X_zp18PwxSaSjY17BKUGXQ%3D%40smp12.simplex.im%2FaqRZM-AuNtvBPtEGFSunlhumMJ8h6rfX%23%2F%3Fv%3D1-3%26dh%3DMCowBQYDK2VuAyEAAkZHWWCzsQqoLj-ovTTI2WPMDhphL3AHbn2U0dzTYhY%253D%26srv%3Die42b5weq7zdkghocs3mgxdjeuycheeqqmksntj57rmejagmg4eor5yd.onion&data=%7B%22type%22%3A%22group%22%2C%22groupLinkId%22%3A%22N0cQqWu-F3KpQP6XQM2QIw%3D%3D%22%7D 

 Excellent, I’ll check it out when I get some free time

Thanks homie, I appreciate it 

 Any time!