I'm running a new test on our systems now. It all came about when I started thinking about building solar panels, installing some batteries, and running our aquariums off of those. Well, we have two barracudas as return pumps and two hammerheads for CL pumps. I started to calculate out how many panels and batteries I would need to run these two tanks. I would need 24 200w panels and two 2,400 pound batteries. Total cost, around $20,000. These four pumps cost around $200 a month to run.
We went to Lowes and bought four timers and I put them on the four pumps. Each hour I run the return pump for the reef and the CL pump for the predator tank. Next hour I run the return for the predator and the CL for the reef. It's only been a week but the reef actually looks better. Time will tell.
I did buy 200 solar cells and we're going to build our own panels. I bought an inverter that the panels attach to and the inverter just plugs into a wall socket. Eventually we'll have a 100 130w solar panels and we won't be paying for electric. I can build a 130w solar panel for around $80 compared to buying one from a commercial vendor for around $750. Batteries can be added later.