Thinking Small and Simple = Thinking Smart

Thinking Small and Simple = Thinking Smart

Over the past decade, rooftop solar has made a big impact on energy generation. Now, in California, energy can be “free” during the day when solar is abundant. That is one of the reasons you have seen CleanStart talk about storage so much. To battle, the BIG problem of Climate Change Utilities and new companies have been advancing storage solutions. One of those companies, Simpl Global, led by Farid Dibachi has developed a battery around the needs of rooftop solar consumers. 

Farid Dibachi is a habitual entrepreneur and has been innovating to make storage simple, hence Simpl Global.  Rooftop solar owners are conscious of their energy cost, and Utilities switching to Time of Use becomes a pain point.  Dibachi saw solar customers getting hit twice with the shift to Time of Use. With their solar systems generating power 3 to 5 hours a day when prices are cheap, they get less for the electricity they generate and pay more for electricity when they are not generating.

From Simpl Global Slides

Residential consumers install solar because it made sense as a capital investment providing a return.  Why batteries were not taking off as solar had is because the cost has typically been greater than the savings.  With that in mind, Dibachi formed Simpl Global with engineers and entrepreneurs to tackle these challenges. They created the SimplBox with innovative technology in Impedance matching, IoT networked controls, and plastics engineered for thermally protecting the energy storage, with a simple design for easy install under a solar panel. 

Their goal was to make a battery that was easy to install and use while being affordable.  They have created SimplBox a safer lithium iron phosphate battery with a unique battery management system. Conventional battery storage systems for home PV require a number of individual devices to manage power flows.  Farid and his team decided to make a battery that paired easily with rooftop solar and relied on clever electronics to replace many of the additional devices.  What they have created is a smart battery that efficiently accepts and delivers power simultaneously.  

Dibachi is particularly proud of the ease of installing and how their advancements in impedance matching have led to a battery management system with high efficiency that can just be plugged in.  The system works like a series of valves efficiently accepting and delivering power simultaneously.  Its efficacy and simplicity allow it to be modular, meaning expanding storage capacity is as easy as plugging-in another SimplBox and using off the shelf inverters for the systems connection to the grid.  This is big, because of its versatility, but it also allows it to be small.

SimplBox System by Simpl Global

This versatility allows for the SimplBox to scale up for use in Utility Solar. It isn’t limited by the capacity of the SimplBox, because you can add more without having to change the battery management or specialized hardware. Being able to “just add more” is an advantage for utilities and solar power companies looking to make incremental changes.  

In residential storage, LG and Tesla have developed storage options greater than 10 kwh. They make them large so they can support a larger solar system and capture the max power possible.  In Sacramento, a solar system can easily fill an LG and Tesla Battery in the summer, but the average daily generation is ~6 kwh.  That low generation with install cost batteries that size is cost-prohibitive to many, especially smaller urban systems. The SimplBox is made smaller and modular, with the idea that more solar customers can take advantage of it. 

All of this addresses the pain points of residential consumers by giving them control and reducing the cost. Simpl Global plans on selling through existing solar installers and distributors this August after they complete their UL Certification in July.

Farid Dibachi spoke at our recent CleanTech Meetup on Simpl Energy.  You can watch it here and read about the meetup here.

Thomas Hall

ABOUT THE AUTHOR

Thomas is the Executive Director of CleanStart. Thomas has a strong background in supporting small businesses, leadership, financial management and is proficient in working with nonprofits. He has a BS in Finance and a BA in Economics from California State University, Chico. Thomas has a passion for sustainability and a commitment to supporting non-profits in the region.

Sponsors

SMUD
CMC
RiverCity Bank

Weintraub | Tobin, Revrnt, Moss Adams, PowerSoft.biz, Greenberg Traurig

Keep your Electronics Running

Keep your Electronics Running

Ever wondered what would happen to all your communication devices, smart home devices or refrigerator when power is lost from the grid. You no longer need to worry about losing access to those devices when using Off The Wall Energy’s Personal Energy Platform. 

Bob Guimarin of Off The Wall Energy is creating the Personal Energy Platform, a portable micro-energy storage system with real-time awareness of grid and off-grid availability. It works much like a mini-Tesla power wall, but located inside your home at each wall outlet, maintaining power to your most critical devices.

The Personal Energy Platform is a power management system that can be charged at night and discharged during the day, negating the use of grid power when rates are high. It can be plugged into a 120V/240V AC wall outlet and directly connects to your AC and DC devices. It has a unique approach to lower energy waste by connecting native DC devices directly to the Personal Energy Platform without the use of individual device AC/DC inverter power cords. Current plans are for two models, a 440W CommHub unit that can be used to power your home communication devices and a 2000W (2kWh) PowerPlus unit that can power refrigerators and more. 

The Personal Energy Platform is an attractive consumer-oriented product designed for maximum flexibility and ease of use.  All the while operating autonomously to support your critical communications, security systems, food preservation, and home medical devices without the need to swap power cords or impacting your lifestyle choices.

If you want to learn more about Off The Wall Energy, make sure you come to our meetup on February 27, 2020

Going 100% Renewable Needs More Storage

Going 100% Renewable Needs More Storage

Much of the attention in Clean Energy these days goes to consumer products and energy generation. This is well deserved because the contribution to global warming energy generation has made and consumers wanting to learn more about how to reduce their impact. The complicated reality of going to 100% renewables is not just energy generation or changing our lifestyles but also updating the grid and adding storage to it. Storage is things like Lithium-ion Batteries, SPIN’s flywheel, and pumped hydro.

 In passing SB 100 the State Government made California a world leader with an ambitious goal to operate 100% on renewables by 2045.  Successes in solar, utility-scale and rooftop we have reduced our emissions but also changed the energy demand profile of the electric grid. A perfect example of this is the duck curve of energy demand.  The complications of meeting energy supply and demand is a very real obstacle in maintaining grid reliability as we move to 100% renewables. To manage an ever more complex grid we need storage.

 Policies contributing to the success of solar should be expanded to promote storage.  We are seeing the California Energy Commission invest in the commercialization of more storage projects and companies like Electrify America are investing in grid storage to avoid impact cost of Electric Vehicle Chargers on the grid.  But we can do more. Net Metering, the policies that helped build a fledgling rooftop solar industry, needs to be adopted to promote home storage solutions. Like the early adopters of EVs and Solar, we need to incentivize private investment in storage. There are companies like Empower Energy and Off the Wall Energy, who are gearing up to provide small storage solutions to business and residential companies.  

 Supporting the 100% Renewables in California to fight climate change means supporting Storage.

Thomas Hall

ABOUT THE AUTHOR

Thomas is the Executive Director of CleanStart. Thomas has a strong background in supporting small businesses, leadership, financial management and is proficient in working with nonprofits. He has a BS in Finance and a BA in Economics from California State University, Chico. Thomas has a passion for sustainability and a commitment to supporting non-profits in the region.

Sponsors

SMUD
CMC
RiverCity Bank

Weintraub | Tobin, Revrnt, Moss Adams, PowerSoft.biz, Greenberg Traurig

Another Advance in Fast Charging, But Only Half the Story

Another Advance in Fast Charging, But Only Half the Story

A team in Ottawa recently had some success in using micro-pulsing to recharge Li-ion batteries much faster, like a full EV recharge in 5 minutes.  See this article.  That’s a big deal.  But it switches the problem from “how fast can a battery accept a charge” to “how fast can a charging station deliver power”.  There is a gold mine awaiting someone who has a good solution to that problem.  

Here’s what’s going on:  Lithium-ion batteries, at least the ones we have now, develop high resistance to incoming current during recharging.  High resistance creates heat and heat slows the charging process even more. The trick has been to pulse-charge the batteries and actively cool them to get more power in faster, using a battery management system.   The resistance recedes in the off phase, then when charging is switched back on the resistance is once again low. The Ottawa team has found a way to put in such small pulses at high power that the batteries never get into much of the high-resistance mode.  That should also mitigate the need to cool the batteries. They claim a car could get a full charge in 5-10 minutes, putting it right in the range that it takes to refuel a conventional car.  

Other teams are working on solid state batteries that don’t have this troublesome feature of resisting the incoming charge.  They are hoping to get to similar recharge times.

But that just transfers the problem to another part of the system.  We have written on this before. How must a recharge station be powered to deliver such massive amounts of power in such a short time as 5 minutes?  It’s just math. If a full charge gets you 480 miles of driving, and your EV gets 3-4 miles per kilowatt-hour of charge, you will need 120-160 kWh for a recharge.  To get that in five minutes, you would need to be able to provide power at the rate of 12 five minute intervals per hour times (120 to 160 kWh per 5 minutes) = 1.44 to 1.92 Megawatts per hour.  To keep the thickness of the wire within reason, the current would likely need to be limited to 50 amps (the more amps, the more copper in the wire would be needed). So how many volts would be needed to deliver up to 2 MW per hour at a rate of 50 amps?  Watts = Volts times Amps, ideally. So 2 million watts/50 amps = 40,000 volts. Yikes! Lots of safety systems required to prevent the average knucklehead from getting electrocuted.

More importantly, these kinds of MW-level power capacities are not found on a typical electrical distribution system and certainly not something one could put in a home.  It would require tapping into the power grid closer to a substation level where 69 kV and 115 kV lines are available to prevent the instantaneous draw from recharging putting too much of a strain on the system.  Or putting recharging stations near big solar farms. And there likely would need to be some serious capacitor banks to store up power for the bursts needed to deliver to the chargers. In other words, now a fast charging station is a serious piece of electrical gear that can have serious consequences for safety and for the grid that need to be dealt with.

Anyone out there got a better idea how to do this delivery part of the recharger system?  If so, it could be a goldmine for you because ultrafast chargers are likely to be much in demand as the charging technology continues to improve.

Thomas Hall

ABOUT THE AUTHOR

Gary Simon is the Chair of CleanStarts Board. A seasoned energy executive and entrepreneur with 45 years of experience in business, government, and non-profits.

CleanStart Sponsors

Weintraub | Tobin, EY, Stoel Rives, Greenberg Traurig LLP

BlueTech Valley, Buchalter, Moss Adams, PowerSoft.biz

College of Engineering & Computer Science at Sacramento State

Profile: Sac Startup Improves Hotel Efficiency Drastically

Profile: Sac Startup Improves Hotel Efficiency Drastically

What Cleantech company in moving up?  GridRabbit. This year they expect to double their sales.

GridRabbit is real-time hardware and software Smart Room Building IoT System. The GridRabbit System is built with the ability to grow, adapt and integrate new technologies into the platform. The customer can begin experiencing the GridRabbit system just with one type of device, like a thermostat, a year later the same customer can add an in-wall smart switch, voice control device or an EV Charger. All integrated in the same IoT platform. The GridRabbit team is constantly monitoring and adding new features and devices to the GridRabbit system.

In 2010 Smart Grid Billing, Inc. started developing the GridRabbit system and since then installed multiple GridRabbit Smart Rooms all over the over the world. In 2015, Smart Grid Billing, Inc.  in partnership with SMUD installed the GridRabbit solution at two Sacramento Hotels, one of which is the Hyatt Regency Sacramento. Allowing for the hotel to control the energy use in rooms when guests leave. The end-to-end hardware and software solution gives facilities managers more control over a building energy uses. In 2017 Hyatt Regency also installed 26 Electric Vehicle chargers that are integrated with the GridRabbitsolution, allowing even more energy control for Hyatt Regency. These Electric Vehicle chargers can be automatically adjusted in 5 different levels by the GridRabbit solution, increasing the potential real-time energy control from 500 kW to 900kW.This year they are extending that control having installed a 120 kWh Lithium Titanate SCiB battery solution at the Sacramento Hyatt enabling them to flatten out the duck curve even further.  The Hyatt now buys energy from SMUD at night when it is less expensive, reduces energy use when guest leave, and is nearing a flat energy usage curve.

From a Utilities perspective, like that of SMUD, this is big. Smart Grid Billing, Inc. has proved GridRabbit can be used to reduce energy usage during peak times, flatten the duck curve, and integrate battery storage. This is key to incorporating renewable energy and battery storage into the grid.

GridRabbit platform manages power usage with automated rules that can manage blocks of rooms, individual rooms, and even individual light switches and outlets. This enables hotels to not only reduce usage but also help improve visitor satisfaction, because it is more than just turning off lights when people leave.  Often, after a hotel starts working with GridRabbit, problem areas, hurting customer satisfaction, can be identified. For example, problem AC Units or expired lighting all hurt the visitor experience and GridRabbit can identify these issues in real-time and before a hotel takes hit to its reputation. Some of the GridRabbit hotels have more than 5000 GridRabbit Smart devices installed.  Hotels and companies using GridRabbit are experiencing a 30% reduction in energy usage from the controlled loads.

GridRabbit is an official Trademark of SmartGrid Billing.

Thomas Hall

ABOUT THE AUTHOR

Thomas is the Executive Director of CleanStart. Thomas has a strong background in supporting small businesses, leadership, financial management and is proficient in working with nonprofits. He has a BS in Finance and a BA in Economics from California State University, Chico. Thomas has a passion for sustainability and a commitment to supporting non-profits in the region.

Sponsors

SMUD
CMC
RiverCity Bank

Weintraub | Tobin, Revrnt, Moss Adams, PowerSoft.biz, Greenberg Traurig