So if anyone read my latest solar electric bill report, you may have remembered that I found something new to save money. When I installed my solar system, I had an electricity monitoring system also put in. I’m able to monitor my electric usage in real-time. I can walk around the house and flip lights on/off while looking at my monitor on my phone and see instant changes. This monitor opened up my eyes to a lot of wasted electric use. I also had no idea how much energy my pool was using until I got this monitor.
My old pool pump was running at 1500 Watts for 12 hours, plus 4 hours where I ran my Polaris pool sweep. Those 4 hours were using an additional 160o Watts of electricity per hour. That’s 18,000 Watts plus another 6,400 Watts for the Polaris for a total of 20,800 Watts or 20.8 KWh each day! Besides in the summer when I use the A/C much more, my pool pump was contributing 50% of my electricity usage or more.
My new Hayward SP3400VSP EcoStar VS Variable-Speed Pool Pump Energy Star Certified that I purchased from Amazon uses only 100 Watts, as much as a 100 Watt lightbulb on low speed (1000 rpm’s). The pool is now running at low speed for 18 hours per day and at a higher speed during the day for 6 hours. That 18 hours at 100 Watts uses only 1,800 or 1.8KW each day. During the 6 hours of higher speeds (currently 2400 rpm’s) , my electric monitor shows usage of 750 Watts. That’s 4,500 watts total. I am now running my Polaris pool cleaner for only 3 hours since I’m recycling so much more water. That uses another 1200 watts per hour. So that’s a total of 1,800 + 4,500 + 3,600 = 9,900 watts. That’s less than half of the previous usage and I’m probably turning the water over in my pool faster since the piping is larger and it’s running 24/7 thus keeping it cleaner.
That’s a savings currently of 10,900 watts per day or 10.9 kw. 10.9 x 30 days = 327 Kwh. My tiered electric plan would put the cost of this at $0.14 per Kwh so my savings is roughly 348 x $0.14 = $45.78 per month or $549.36 per year. I still plan on fine tuning the speeds and amount of time on each speed. I’m also planning on shortening the time the pump is on when there is cooler weather. I am anticipating savings of up to $720 in my first year. This doesn’t even include savings of using less chemicals because the water stays clearer longer. I can have up to 4 different speeds and multiple changes throughout the day. I’m currently only running two. I’ll be looking for the more energy efficient settings so that my pool stays clear. I have a feeling I can get my savings eventually closer to $60/month.
This was the original graph of my usage (the green is my solar panel production for a sunny day). You can see the pool pump kicked on at 8:30 AM and ran until 8:30 PM. The sharp up and down movements on the graph are my A/C coming on and back off. You can see at 12:30 pm , my polaris kicked on and ran until around 4:30 pm.
This is a new graph after my pump was installed. I don’t even notice the pump running on low speed 24/7 though, the lowest line of usage stays roughly the same around 1kW. You can see when the pump kicks on higher speed though around 10:00 am and then runs until 4:00. The Polaris kicks on around noon and runs until 3:00 pm. If you look at the energy usage when my pump kicks on now versus the old, you’ll see about an 750W difference. This is the beauty of this monitor, I can see in real-time my actual usage. I know that I’m saving money and my bills should start reflecting it.
The best part is that I paid $868 for the pump, plus $160 for installation. I get a $300 rebate from the city and should have that check back any day now. The total cost of this new pump was $728! I can pay for this pump with just one year of usage! This is a much better payback than even the solar system I bought, that takes about 7 years. I just wish I had known this sooner.
So there you have it, another way I’m saving more money each month!