Going solar isn’t the only thing you can do to reduce your electric bills and your environmental footprint. In fact, the first thing you should consider is how you could make your home more efficient BEFORE investing in solar. Investing in a solar system that is bigger than you really need is just a bad investment strategy since efficiency upgrades are often much more affordable than the solar system required to offset the ineficient loads.
One option is to hire a professional to give you a thorough energy audit which will help to pinpoint where your electrical hogs are and what you can do to improve efficiencies. Alternatively, there are a lot of relatively simple steps you can take if you know what to look for. Changing out your old light bulbs to LEDs is an obvious and easy fix for example. But one of the biggest and often under the radar culprits that I’m here to tell you all about are pool pumps.
Pool pumps can have such a big effect on your electric bill that we always discuss it when doing a solar site evaluation at any home fortunate enough to have a pool. Of course we don’t recommend eliminating your pump altogether as they are necessary to keep your water filtered and clean. So what is the solution? There are all sorts of newer “efficient” pool pumps out there and likely your pool guy/girl will happily install if you say you’d like an upgrade. However, what you really need if you want to make a dent in your electrical load is something called a “variable speed” pool pump.
A variable speed pool pump is exactly what it sounds like… Rather than pumping water with a consistently high speed you really only need max power at the outset to get the water moving. Once its moving the variable speed pump then downgrades the output power to keep the water moving since less energy is required to keep something moving than to get something going from a standstill. This reduced speed equals reduced energy loads!
We have heard clients who installed variable speed pumps have seen reductions on their bill on the order of over $500 per year!
The downside for these pumps is often the price is much higher than regular pumps. But I come bearing good news! Many utilities offer rebates and incentives for Energy Star qualified pool pumps. In our home turf of Pasadena, California we are fortunate to have a very proactive utility, Pasadena Water and Power, striving to help residents lower their footprint. They normally offer a rebate of $400-$450 off the sticker price for a variable speed pump. However, I was just notified that PWP is running a promotion on all of their energy efficient appliance rebates through October 31st, 2016:
“PWP is offering a $900 (bought outside Pasadena) to $950 (bought locally) rebate to all PWP residential electric customers who replace their old pool pump with a new energy efficient variable speed or variable flow pool pump and motor. Replacing older inefficient pool pumps with new efficient models will not only help you reduce energy use but save you money. With the summer heat and the possibility of rolling blackouts, PWP wants to make sure you do your part to conserve energy."
We couldn’t agree more! Check PWP’s rebates listing for a list of other rebates to take advantage of. The listed prices on the website include the current promotion.
If you’re not in PWP’s service area, never fear! You can check if your utility has rebates on the Energy Star website.
After you’ve addressed all the drafty windows, switched out your lightbulbs and upgraded all your appliances, then it is time to give Run on Sun a call (626-793-6025) and we’ll help you offset the rest of your energy needs!
California has a long-standing reputation as a clean energy trendsetter. The state leads the nation in solar energy usage, energy efficiency overall, cleaner cars and energy storage. Currently on track to reach our goal of one third energy derived from renewable sources by 2020…Governor Jerry Brown kicked it up a notch in January by proposing California achieve an unprecedented 50 percent energy from renewable sources by 2030.
How will California accomplish such an ambitious target? This is the first in a series of blogs in which Run on Sun will addresss the challenges and possible solutions to reaching 50% by 2030 as opportunities unveil.
Ivanpah Solar Electric Generating Station
While rooftop solar is great for offsetting the usage of those fortunate enough to be able to invest in an array, most people tend to think utility-scale solar requires wide open spaces only available in remote parts of our state. The best example being Ivanpah, the world’s largest solar power plant - generating 345 megawatts on five square miles near the Cali/Nevada border. However, growing to 50% renewables using vast spreads of desert solar arrays has the potential to harm ecosystems. Far away solar farms also incur enormous infrastructure costs just to transport the power from the source to your toaster.
Fortunately a new study provides evidence that we needn’t look further than our urban back yards to find sufficient space for solar. Stanford researchers published their findings in the March edition of Nature Climate Change:
We tested the hypothesis that land, energy and environmental compatibility can be achieved with small- and utility-scale solar energy within existing developed areas in the state of California. We found that the quantity of accessible energy potentially produced from photovoltaic (PV) and concentrating solar power (CSP) within the built environment exceeds current statewide demand.
The urban landscapes we design are already great at capturing the sun’s rays, as evidenced by the heat island effect. It turns out we have the capacity to develop enough solar power to meet three to five times California’s demand just by utilizing urban flat spaces such as carports and rooftops. Obviously developing small and utility-scale solar in our built environment greatly improves efficiency and cuts infrastructure costs by generating power directly where it is used.
As the study’s authors note, it’s important to remember there will always be trade-offs. It’s not an all-or-nothing, urban-or-rural question but looking more closely at the opportunities for solar in our urban backyards should be a priority.
Last I checked, people keep having babies, so the demand for homes is not going to slow down any time soon. But the fact is, times are changing. What was valuable in your home when you bought it may not be as important to prospective buyers today.
The challenges of climate change are becoming more widely accepted—a New York Times poll found that 83% of Americans now believe global warming will be a serious problem in the future. Thankfully, gains in residential energy-efficiency improvements offset more than 70% of the growth in both the number of homes and increasing footprint sizes, according to the US Energy Information Administration (EIA). However, these gains in recent decades will need to significantly improve to make any kind of difference in terms of climate change.
But there is hope! The trend toward more efficient homes in the housing market is already getting attention. After surveying both home builders and home buyers, the National Association of Home Builders (NAHB) reported that Millenials want energy-efficient appliances and features as well as smaller homes. Smart technology such as programmable thermostats will also become the norm. Respondents said they were willing to pay 2-3% more for better energy-efficiency if they could see a return through lower electric bills. Respondents also said they’d be happy to sacrifice extra finished space for a more affordable first home.
If you are a home owner you should be tapping into the energy-efficiency trend to not only lower your utility expenses but improve the marketability and value of your home. If you follow our blog you may have seen our recent post discussing new evidence supporting the idea that solar increases property values. While installing a solar system is the granddaddy of all home energy-efficiency projects, we at Run on Sun always encourage clients to address low hanging fruit first, and make sure your energy usage is as low as possible. This will lower the size of the solar system you need to offset your usage, and thus, the overall cost of your solar investment.
Way too much of the energy we consume is wasted through poor insulation, leaky ducts, or inefficient household appliances. Fixing these problems can cut energy costs up to 25% for the typical home. One option is to ask a professional energy auditor to find exactly where your energy is going (we have some folks we can recommend). However, many energy saving tips are intuitive…installing double pane windows, better insulation, CFL or LED light bulbs, and ENERGY STAR appliances are all ones you’ve likely heard before. Others may be lesser known such as using power strips to avoid vamping power. And if you have a pool, upgrading that antiquated pool pump could save you a lot!
Once your home is up to snuff, going solar is a great investment to make your home even more desirable in the current housing market. Call Run on Sun today for a free site assessment!
As its moniker suggests, the Internet of Things (IoT) is about the connectivity of ‘things’, not people. Hence, managing our hyper-connected world by using data from remote sensors in our devices to provide control in a smarter, more efficient way. As nebulous and vague as the ‘Internet of Things’ is, it has been cited as the hot technology trend of the future. In a recent Business Insider report, they estimate IoT growth will increase connections from 1.9 billion devices today, to 9 billion by 2018 (see chart below).
In fact, IoT is already a reality with 24/7 connectivity to laptops, tablets, smartphones, smart TVs, gaming consoles, and even wearable devices.
One of the best known applications for IoT is the smart metering of electricity, water, and waste systems as well as integrated management of home and building systems. Building temperature, humidity, ambient light and occupancy could be monitored by sensors and used to control heating, lighting, air-conditioning, and the operation of doors and windows, etc.
Smart thermostats such as Google’s Nest allows home owners to manage their heating requirements remotely via their smartphone. Where utilities participate, users can program their biggest energy inefficient appliances (heating and cooling systems, washers and dryers, refrigerators, ovens, dishwashers, and pool pumps) to respond to varying energy tarifs and avoid peak demand periods. Sometimes demand reward credits are offered by utilities.
While these applications may make the workplace and home more comfortable and secure, the real motivation for adoption of such systems will be from potential energy benefits and hence cost savings. Avoiding peak periods would also have the broader environmental benefit of spreading demand, allowing power plants to operate more efficiently and reduce the need to build generating capacity to meet demand spikes.
But opinion seems divided over whether the Internet of Things will deliver improved energy efficiency overall. The exponential growth in the number of connected ‘things’ that all consume power could negate many of the efficiency gains of things like smart thermostats. More than $80 billion in power is wasted by connected ‘things’ according to an IEA (International Energy Agency) report. This is what is known as “vampire power”, or “vamping", and refers to energy used when devices are switched off or in standby mode. The IEA report notes the problem could result in $120 billion USD wasted by 2020 due to vamping!
One potential smart solution to vamping is to make appliances in the off or sleep mode actually power off but respond to a timer which is only responsive to the “on” switch during a portion of each second. The long term key to whether IoT improves energy efficiency lies with improving the energy efficiency of the devices themselves while at the same time providing innovative applications.
The wider potential of the Internet of Things is enormous and exciting. Wider ’smart grids’ could make our urban centers dynamic and responsive to energy demands, optimizing city-level energy use. As the Internet of Things continues to grow, the opportunity for bigger energy and environmental benefits from applications like smart grids could become a valuable reality assuming the overall efficiency of our ‘things’ also continues to improve.
We stumbled upon an interesting graphic that highlights just what it takes to keep the lights on in our homes and work places. It is a tale of both efficiency and waste. We thought it was worth sharing… (h/t The EnergyCollective.)
The starting point for the graphic (click on the image at left for the full size graphic) is an old fashioned (i.e., wasteful) 100 Watt incandescent light bulb. If you turned on such a light and left it running for a year, how much energy would it consume? That’s the easy calculation - 100 W = 0.1 kW. There are 8,760 hours in a year (roughly - don’t go getting all leap year on me) so our light bulb uses:
0.1 kW x 8,760 hours = 876 kWh.
Quite a lot, really, just to light a room!
The graphic proceeds to explore what it would take to produce that much power from each of our common energy sources. Interestingly, only one of these sources is something you can own - and that, of course, is solar. (While you could own a wind turbine, the one in the graphic is a 1.5 MW turbine, definitely not something to put in your backyard!) To be fair, the graphic assumes an installation of 100 square meters which is 1,076 square feet, and that is significantly larger than most residential solar systems. If your system is smaller, it takes longer for your system to keep the light on, but the end result is the same: your own power source meeting your needs, with no pollution or long-lived waste products to worry about.
On the other end of that scale is the coal plant where our light bulb requires us to burn nearly half a ton of coal and emit over a ton of CO2 in the process!
The good news is that both that wasteful incandescent light bulb, and coal-fired power plants are going away, just not fast enough. (Changing out your old 100 Watt light bulbs with efficient LEDs will drop these numbers by more than a factor of five.) Every solar installation directly reduces our greenhouse gas emissions - and saves the system owner substantial amounts of money over the lifetime of the system.
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