Dear Installer, Thank you for your continued patronage of LGES products. Beginning July 25, 2023 we are amending our processes as we continue to align with the residential battery industry. We would like to bring these changes to your attention in our most recent version of the US Warranty RMA Guidelines, attached. As you may already be aware, LGES began shipping the new unit at time of RMA confirmation as of 11.01.2023. Since product is readily available, additional measures are being implemented to encourage timely RMA turn-around and return of the defective units: *Issues that exist longer than 90 days prior to RMA submission may be denied for replacement, page 3 RESU RMA PROCESS. *LGES's new app-based RMA platform, GECP, is available for download and allows for real-time updates on RMA submittals. Please ensure that all troubleshooting guidance is followed prior to, and on, submittal, pages 3-5 RESU RMA PROCESS. *Refunds of used equipment have been phased out, page 4 RESU RMA PROCESS. *Defective batteries must be returned within 30 days of receipt of the replacement battery, page 5 UNRETURNED PRODUCT POLICY. *Labor reimbursement is limited to 30 days of receipt of the replacement battery, page 6 LABOR REIMBURSEMENT PROCESS. *Downtime Compensation for RMA units is no longer being offered, page 7 RECALL OF CERTAIN GEN2 UNITS. *"Happy Call" implementation to connect with installer and ensure a swift replacement and retrieval process, page 7 CONFIRMING THE SWAP WITH LGES. LGES is excited to continue working with you and your homeowners to provide excellent residential energy storage options.Please download the full RMA guidelines file by clicking below link. Thank you, LGES Customer Service Team 888-375-8044 US Warranty RMA Guidelines 20230725

PRODUCT SAFETY RECALL LG Energy Solution Michigan, in cooperation with the U.S. Consumer Product Safety Commission, is voluntarily undertaking two separate recalls of RESU10H lithium-ion storage batteries that were sold with certain Residential Energy Storage Systems. First, as announced in December 2020 and expanded in August 2021, LG Energy Solution is replacing ESS Home Batteries that were manufactured during a certain time period. A recall notice is available on the CPSC website: https://www.cpsc.gov/Recalls/2021/LG-Energy-Solution-Michigan-Recalls-Home-Energy-Storage-Batteries-Due-to-Fire-Hazard-0 Second, as announced in October 2022, LG Energy Solution is voluntarily updating the diagnostic software for a separate range of ESS Home Batteries manufactured during other time periods. A recall notice is available on the CPSC website: https://www.cpsc.gov/Recalls/2023/LG-Energy-Solution-Michigan-Recalls-Home-Energy-Storage-Batteries-Due-to-Fire-Hazard-Recall-Alert The affected ESS Home Batteries can overheat in rare circumstances, posing a risk of fire and emission of harmful smoke. LG Energy Solution has received reports of thermal events in the United States causing property damage and one injury. LG Energy Solution is undertaking this voluntary action as part of its commitment to product safety and customer service. Please check your battery's serial number (see illustrations below for location) and enter it here to check whether your battery is affected by either the First or Second Recall: https://www.lgessbattery.com/us/home-battery/checkSN.lg Recalled RESU 10H ESS Home Battery What products are affected? ESS Home Batteries are marked with a unique serial number, which can be used to identify batteries affected by the recalls. The ESS Home Batteries, model number RESU10H, were sold by various distributors of solar energy storage systems (including Sunrun, CED, Baywa, Krannich, AEE Solar, Independent Electric Supply, and Inter Island Solar Supply) from March 2017 through March 2020. How do I know if I have an affected product? You will need to identify the serial number of your ESS Home Battery. Please use the guidance in the illustrations below to locate the serial number. Contact LG Energy Solution if you need assistance by phone at 888-737-8104 from 9 a.m. to 5 p.m. ET Monday through Friday, or by email at RESUservice@lgensol.com. The ESS Home Battery's unique serial number, which is located behind the access door at the bottom right of the unit, will determine if that battery is affected. The following illustration shows how the unique serial number appears. Serial numbers begin with "R" and are 23 characters (a mix of letters and numbers). In the example below, the unique serial number is "R15563P3SSEG11610317001." To check whether your battery is affected by either recall, please enter your battery's serial number here: https://www.lgessbattery.com/us/home-battery/checkSN.lg. I checked my serial number, and my battery is subject to the First Recall and requires replacement. What are the next steps? LG Energy Solution is replacing affected ESS Home Batteries free of charge as replacement units become available. LG Energy Solution, its distributors, and its installers are attempting to contact owners directly, but consumers with recalled batteries may also contact LG Energy Solution to schedule a free replacement. LG Energy Solution has arranged for modifications to recalled batteries that are connected online to reduce the risk of overheating until they can be replaced with new batteries. I checked my serial number, and my battery is subject to the Second Recall and requires a diagnostic software update. What are the next steps? If your unit is connected online, and if you have agreed to remote updates to your inverters, LG Energy Solution will arrange the diagnostic software updates remotely. Please keep your battery powered on and connected online so that LGES may deliver the software update to your battery remotely. The diagnostic software updates are designed to monitor the recalled battery cells and shut down the battery if a potential risk of overheating is detected. If your battery shuts down, please contact LG Energy Solution for further instructions. Do not attempt to turn the battery on again. If your ESS Home Battery is not connected online, please contact LG Energy Solution immediately by phone at 888-737-8104 from 9 a.m. to 5 p.m. ET Monday through Friday, or by email at RESUservice@lgensol.com, to schedule a manual software update. LG Energy Solution, its distributors, and its installers are also attempting to contact owners directly if their units are not connected online to arrange for a technician visit to manually update the diagnostic software. CONTACT US Please contact LG Energy Solution with additional questions. Phone: 888-737-8104 from 9 a.m. to 5 p.m. ET Monday through Friday Email: RESUservice@lgensol.com About LG Energy Solution LG Energy Solution is a global leader delivering advanced lithium-ion batteries for Electric Vehicles (EV), Mobility & IT applications, and Energy Storage Systems (ESS). With 30 years of experience in advanced battery technology, it continues to grow rapidly towards the realization of sustainable life. With over 23,000 employees working within its robust global network that spans the US, Europe, Asia, and Australia, LG Energy Solution is more committed than ever to developing innovative technologies that will bring the future energy a step closer. For more information, please visit https://www.lgensol.com.

Dear valued partners, As always, thank you for your interest in our RESU Energy Strogage System. We are happy to announce that the LG Energy Solution Training Academy is open! The academy is the platform where you can view a video which will assist you to pass the Certified Installer test. It will also help you discover RESU's competitive advantages. The video will be uploaded periodically, so please revisit our Training Academy on a regular basis. We appreciate your interest and loyalty! https://www.bigmarker.com/communities/LGEnergySolution/conferences ▲LG Energy Solution Training Academy Link Sincerely, LG Energy Solution

Frequently Asked Questions Regarding LG Energy Solution's Recall and Battery Software Update Program Q1: Why is LG Energy Solution updating my battery's software? A: In cooperation with the U.S. Consumer Product Safety Commission ("CPSC") and other global product safety authorities, LG Energy Solution ("LGES") announced a recall of certain home energy storage batteries. The home batteries can overheat in rare circumstances, posing a risk of fire and emission of harmful smoke. Accordingly, LGES has arranged for remote software updates to recalled batteries that are connected online. The diagnostic software updates are designed to monitor the recalled battery cells and shut down the battery if a fire risk is detected. LGES is undertaking this voluntary action as part of its commitment to product safety and customer service. Q2: What should customers do to access the software update? A: No action is required by customers whose batteries are connected online, because LGES will deliver the diagnostic software updates remotely. If your ESS Home Battery is not connected online, LGES, its distributors, and its installers will attempt to contact you to arrange for a technician visit to manually update the diagnostic software. Customers can also contact LGES by phone at 888-737-8104 from 9 a.m. to 5 p.m. ET Monday through Friday, or by email at RESUservice@lgensol.com, to schedule a manual software update. Q3: Should I stop using my battery? A: No. Please keep your battery powered on and connected online so that LGES may deliver the software update to your battery remotely. Q4: What should I do if the updated diagnostic software shuts down my battery? A: If your battery shuts down, please contact LG Energy Solution Michigan by phone at 888-737-8104 from 9 a.m. to 5 p.m. ET Monday through Friday, or by email at RESUservice@lgensol.com, for further instructions. Do not attempt to turn the battery on again.

Frequently Asked Questions Regarding LG Energy Solution's Battery Replacement Program Q1: Why is LG Energy Solution replacing my battery? A: In cooperation with the global product safety authorities responsible for product replacements, LG Energy Solution (LG ES) recently announced a free replacement program for certain residential energy storage system batteries. These certain home batteries can overheat, posing a risk of fire and emission of harmful smoke. LG ES is undertaking this voluntary action as part of its commitment to product safety and to providing the highest quality and service to its customers. Q2: Should customers turn off the batteries? What should customers do until the batteries are replaced? A: No action is required by customers whose batteries are connected online, because LG ES has remotely deployed modifications to impacted batteries to reduce the risk of overheating. Customers whose batteries are offline should call LG ES or their distributor/installer for further instructions. Out of an abundance of caution, if a customer plans to leave home for an extended period of time, such as a vacation, LG ES recommends turning off the system to avoid leaving the home battery in a fully charged condition. Q3: Will LG ES replace affected units with new batteries? A: Yes, LG ES will replace the affected batteries with newly manufactured batteries that incorporate state-of-the-art safety features that were designed to prevent overheating that might lead to fires and/or emission of harmful smoke. Q4: Please explain the replacement process. A: The program will begin in October 2021. LG ES will contact the original installers for the batteries to arrange for that installer to perform the replacement service work. If for any reason the original installer is not able to perform the work, LG ES will make alternative arrangements. LG ES has already started contacting the owners of the batteries with instructions, but battery owners, installers and distributors who would like additional information should call LG ES' help line listed at the end of the FAQ. LG ES will work to arrange a replacement schedule that is convenient for you. However, please understand that despite the company's best efforts, there may be some delays, due to factors that are outside our control, such as the severe global shortage of semiconductors and other components of residential energy storage systems. As stated above, if you own an "offline" battery, please contact LG ES as soon as possible to provide the company with your specific location and battery information to start the process as soon as possible. Q5: Will LG ES extend the existing Warranty period for the product as part of its replacement program? A: Yes, all replaced remotely modified batteries will come with a new ten (10) year warranty period, starting from the date of installation. Call your distributor/installer for further details. 1. Phone number : +49 (0)6196 5719 699 2. Email address : service@lgresu.eu 3. Website : https://www.lgessbattery.com/eu 1. Phone number : +1-888-737-8104 2. Email address : RESUservice@lgensol.com 3. Website : www.lgessbattery.com/us 1. Phone number : - From Australia - 1300-677273 - From New Zealand - Land 0061 1300 677 273 - From New Zealand - Mobile (+61) 1300 677 273 2. Email address : productau@lgensol.com 3. Website : www.lgessbattery.com/au