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. I also looked at the website of service providers like H2O Building Services (find out more here) to know more about how to recycle the water from my pool.
The heat pump works by transferring heat from a low-temperature source to a high-temperature source by supplying a small amount of high-grade electricity. Therefore, Water Source Heat Pumps could be used for both domestic and commercial hot water uses. Coming back to my old pool pump, it 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. I’ve been looking at concrete overlays around pools as I could do with a new deck, especially since I have the rebate to help pay for it! It’s just an idea at the minute though. Now I have the new pump I just want to improve the overall appearance of the pool area. Anyway, 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!