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COVID 19 Configuration of Public / Commercial Spaces

Offices, Hotels, Restaurants and Retail Reconfigure for Social Distancing The COVID 19 Pandemic has significantly affected how we interact with each other which will have long term implications on public and commercial space design. While many restrictions may be temporary (we hope) the long term effect of the pandemic will be a change in the design landscape of how we work and play. We at Coil Electric have begun working with many of our partners to reconfigure and adapt to the safety requirements mandated by local authorities. Commercial / Offices With the rise of the remote workforce, many designers have begun to plan for a hybrid model; part time in the office and part time remote. Reconfigured offices would have limited desks which have been appropriately spaced with the office layout focused on in person team meeting spaces. Many employees would transition to a work from home model with scheduled in person, in office meetings which have already been announced by major companies. The move to “team huddles” allows for greater flexibility of the office space, reduced footprint (cost) and reduced exposure. The following are to be considered as this spaces are re-designed: Data / Connectivity With a shared / communal work space, reliance on wifi and mobile computing will dramatically increase as well as having sufficient lighting and outlets to power those devices as they are spread out over the office. Wireless WIFI access points (WAP) - these would be increased to allow for coverage and increase bandwidth being used by video and increased wifi users Lighting - with a shift to a more spread out office, sufficient lighting will need to be available for those areas Outlets - ensure that outlets are easily accessible especially when tables and chairs are are placed apart from each other and away from walls or existing power rails Hotels Hotel lobbies are being reconfigured to allow for a more flexible space. Individual pods and separated reception / concierge desks offer increased protection to meet social distancing requirements. The increased need for outlets and lighting in new areas is needed. Please feel free to contact us to better understand how we can assist in reconfiguring your space to meet new COVID 19 and social distancing guidelines.

Multi-Unit Shared Charging for Property Managers and HOAs

New Revenue Streams and Lower Installation Costs Currently, there exists many shared or managed EV solutions targeting multi-unit condo or apartment properties. These solutions are based on a business model of where the tenant pays a monthly charge for EV electrical usage and the property manager is reimbursed. Often times, the reality of these programs are: All upfront installation fees are borne by the property owner which are significant; the equipment is expensive and the ROI is long The property continues to pay a monthly fee for maintenance in addition for the full electric utility for EVs used by the tenant Reimbursement to the property owner occurs months later The tenant is required to use an app for charging and creates confusion each time charging occurs A Simpler Approach For most property manager, a flat monthly EV charge has shown to be a simple solution with the following results: Immediate monthly revenue from tenant for EV usage Easy billing, property managers are well adapt at charging additional fees for upgrades Easy to use by tenants and lower installation costs No monthly fees for EV maintenance or ongoing charges Comparing managed solution with Coil Electric Coil Electric Revenue Benefits vs. 3rd Party Managed Solutions The Property Manager bills a flat monthly fee to the tenant vs. having to use complicated apps and quarterly payouts by 3rd parties Most properties understand and manage this process very effectively, no need to have a 3rd party involved in a basic property management function Simple billing for the tenant and a constant revenue stream for the property manager Electrical costs assessed on a yearly basis based on a baseline Coil Electric Costs Benefits vs. 3rd Party Managed Solutions Coil Electric offers reduced installation costs by using industry standard outlets and connections which allows the tenant to use their own portable chargers With 3rd parties, there is a very high upfront installation fee or substantial monthly adder We eliminate the need for costly equipment such as chargers and sub meters ELIMINATE MONTHLY FEES - 3rd party's business model is an ongoing monthly fee which is becomes very costly over time Coil Electric Experience Benefits vs. 3rd Party Managed Solutions Coil Electric uses standard equipment and there isn't a managed app or cumbersome log-in procedures to charge Out solutions are "Plug and Play" Installations are standard which can be easily be serviced and managed vs. equipment which will need to be replaced due to technological obsolecence Conclusion For instances where the HOA or the Property Management will provide EV charging solutions, Coil Electric can develop a fully customized solution generating immediate monthly revenue, lower installation costs and easy to use and maintain solutions.

Installing an EV Charger in My Condo or Apartment Building

Many options exist and solutions for multi-unit buildings As a San Francisco based Electrical Service Provider specializing in EV solutions, many of our customers live in multi-unit properties (Condos / Apartment Buildings) with a shared garage. Based on our experience the following are typical concerns voiced. Can we even do it? EV charging needs to be tied to my unit’s meter and not shared by others or the HOA The HOA requires qualifications, plans or scope, permits Until very recently, most multi-unit buildings were not designed for onsite EV charging and the building’s electrical system was designed for efficient power delivery to the unit. Most multi-unit buildings were designed with a stack of meters (typically on the ground floor in the garage or electrical room) for each unit and from there, powering their residence via a sub panel installed inside the unit. In most cases, the sub panel with the breakers are nowhere near or easily accessible to the garage or location where the EV charger is to be installed. However, there are techniques and technologies which allow us to “tap” the power at the meter and “splice” into the power feed to the unit. Figure 1. A typical multi-unit meter which feeds the unit. The “black boxes” next to each meter is the main circuit breaker which powers the sub-panel inside each unit. Figure 2. A sub panel which is located inside the unit away from the garage where the EV charger needs to be installed Installation Complexity Location of Meters Low: Inside garage on same level Medium: Electrical closet on same level or 1 floor above or bellow Offsite, multiple floors away Garage Levels Low: Single level Medium: Up to 2 levels High: Multiple level garage EV Charger Location Low: Line of site, same level Medium: Single level away with a clear path High: Multiple levels or buildings away Building Types Low: Low-Rise (4 floors or less) Lofts, townhouse Duplexes or single-story multiplexes Medium: Mid-rise High: Hi-rise Complexes Our installations insure that power is being used from the appropriate unit owner’s meter and is not using “house” power. Depending on power requirements and availability of power, or solutions include either a small sub panel which is mounted nearby the electrical meter (known as a meter tap) or we use a power management system such as the DCC Electric Vehicle Energy Management System. Based on the load available to the building and the unit, we are able to determine which solution is ideal. Lower per unit installation cost, economies of scale can be achieved when multiple installations are done through combined wire runs and panel installations. Coil Electric works with HOAs to provide all required documentation, compliance and regulatory compliance. We are certified with most manufactures including Tesla, ChargePoint and ClipperCreek and carry the required insurance and workman’s comp required. These documents will be provided during the HOA approval process.

What’s The Best Charger For My Tesla?

Tesla Wall Connector, EV Charger or NEMA 14-50 / 6-50 Outlet We are often asked what’s the best Level 2 charging solution for my Tesla vehicle. And before we get started on the technical differences between options, the primary factors affecting the decisions are not technical but rather: Tesla Model Vehicle usage - miles driven per day Amperage availability (“power available”) Vehicle agnostic charging options For a first example, we will use a TESLA Model 3. Let’s analyze vehicle usage, specifically how many miles are driven on a regular basis. We are going to assume an 8 hour charging period based on utility programs and common overnight charging. Tesla Wall Connector Generation 3 MIles Per Hour Charge: 44 Benefit: Up to 50% increase in charging speed. Charge less often . Networkable - ability to share circuits and be part of multi charger solution. Considerations: Based on the maximum amperage available which would need to be determined before installation. TESLA proprietary Must be purchased separately from the vehicle 8 Hour Charge: Up to 352 Miles Standard EV Charger J1772 MIles Per Hour Charge: 30 Benefit: Industry standard Level 2 standard across most manufacturers. Considerations: For TESLA models, an included adapter must be used. Charge port door must be manually opened via the release button in the vehicle Must be purchased separately from the vehicle 8 Hour Charge: Up to 240 Miles NEMA 14-50 or 14/-60 Outlet MIles Per Hour Charge: 30 Benefit: TESLA includes a mobile charger with each vehicle. Considerations: The user must purchase the NEMA 14-50 or 14-60 adapter (dongle) Ability to purchase adapters for different types of electrical outlets including dryer and standard 110v outlet 8 Hour Charge: Up to 240 Miles Tesla Wall Connector Generation 3 The latest Tesla charger which provides for the fastest charge of any Level 2 solution Clipper Creek Standard EV Charger J1772 This is a common EV charger which can support Tesla and most other manufacturers who use the J1772 standard. Nema 14-50 Outlet This is a universal standard outlet which allows you to bring your own charger. Tesla Corded Mobile Connector Most flexibility of outlets and amp ratings using adapters. Included with each Tesla vehicle. Considerations Based on an 8 hour charge, the Tesla Wall Connector at full charge capacity would be able to provide nearly a full vehicle charge while the other options would still provide a significant charge and miles driven should be factored. Having the ability to skip (or forget to charge) or a slightly faster “top off” makes the WallConnector a better solution. A Corded Mobile Connector is included with each Tesla; owners keep it in the vehicle as an emergency charger vs. having to unplug from the outlet (or forgetting it) when taking a road trip. The Generation 3 Wall Connector is a network device with very significant future networking features such as multi-unit charging and integration with Tesla’s energy ecosystem. However, let’s consider the Model X’s charging speeds which are significantly less than the Model 3’s. Tesla Wall Connector Generation 3 MIles Per Hour Charge: 30 8 Hour Charge: Up to 240 Standard EV Charger J1772 MIles Per Hour Charge: 20 8 Hour Charge: Up to 160 NEMA 14-50 or 14/-60 Outlet MIles Per Hour Charge: 20 8 Hour Charge: Up to 160 Based on the Model X’s slower charging, the Tesla Wall Connector’s increased charging performance is significant and we encourage it as a charging solution since the vehicle’s charging needs are significant. Load Calculations and “Available Power” Critical to the charging speed assumptions is “available power”. Based on the following, here are the amperage requirements for each charging solution. Tesla Wall Connector Generation 3 Break Size (Maximum): 60 amp breaker Actual Used By Vehicle: 48 amps Standard EV Charger J1772 Break Size (Maximum): 40 or 50 amp breaker Actual Used By Vehicle: 32 amps NEMA 14-50 or 14/-60 Outlet Break Size (Maximum): 40 or 50 amp breaker Actual Used By Vehicle: 32 amps Available power is actually how much load can be safely placed in the existing electrical infrastructure based on amps available. A load calculation determines how much amperage is available to be allocated to the EV charger based on the total amount of amps available and how much electrical draw occurs by other devices such as appliances and general consumption. Based on the amount of available amperage as determined by a load calculation, we would be able to suggest the safest charging solution, the highest amperage amount. Conclusion For most real world applications, the choice of level 2 charger solution is driven by cost and interoperability with other electric vehicle manufactures. While the Tesla Wall Connector presents significant performance advantages, these benefits are only realized if the electrical infrastructure can support the increased charger speed and desire to stay within the Tesla ecosystem.

Coil Electric, CA License: 814779

GENERAL, ELECTRICAL & PLUMBING CONTRACTOR

SAN FRANCISCO / MARIN

1307 Hayes Street
San Francisco, CA 94117

PENINSULA / SILICON VALLEY

4180 El Camino Real
Palo Alto, CA 94306

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