FAQs regarding the RESU 6.4EX Storage Unit
Contents
1. FAQs regarding the RESU 6 4EX Storage Unit 1 What are LG Chem s plans for Australia Initially we plan to launch RESU 6 4EX EX a residential storage solution which is an expandable unit and which has had a great market response in Japan and Europe As awareness of our products and overall interest increases we will also release the high capacity and high energy residential as well as commercial storage solutions together with MhW Grid connection type storage These additional products are ready to come in the market late in 2015 and in 2016 2 When are the LG Chem products for residential storage due for release in Australia Our RESU 6 4EX product will be available in Australia in late July early August We are currently trialing some units and these trials will determine the final launch date The initial units of the RESU 6 4EX will be shipped to Solar Juice and should arrive in late July early August The expansion units of 3 3kWh will be shipped in August and will be available September We are looking to introduce commercial ESS 42kWh 84kWh and Grid connection products MWh Scale While we expect Solar Juice to be a solid distribution channel other distribution channels will be become also available It is planned that all storage units will go via distributors other than special large scale orders for specific commercial or new residential development customers 3 What is the expected cost for the RESU 6 42. Yearly Use Rate to obtain full warranty period in nameplate energy x 300 meaning 6 4kWh x 300 1920kWh So the full ten years gives you a warranted 19 200kWh of use even though our testing indicates that with 6000 cycles at 90 discharge the storage battery actually will be able to deliver 34 560kWh Nevertheless if the battery is pushed to obtain more cycles and a higher than recommended annual use rate of 1920kWh than the following warranty formula applies If the additional use rate is 1 to less than 10 more than recommended number of kWh then the warranted usable energy will be reduced by Additional Use Rate in per cent x 0 3 For example if the yearly accumulated discharged energy was 2000kWh then the warranted total usable energy would be reduced by 1 26 as the following calculation would apply 2000kWh used 1920kWh warranty maximum per annum 80kWh more 4 2 more than warranted use rate 4 2 x 0 3 1 26 reduction e lf more than10 Warranted Use Rate and less than 20 then the warranted usable energy will be reduced by Use Ratex0 6 e If more than 20 Warranted Use Rate and less than 30 then the warranted usable energy will be reduced by Use Rate x1 2 e lf more than 30 Warranted Use Rate then the warranted usable energy will be reduced by Use Rate x1 8 Using this condition as another sample if the annual discharge energy was 2 592 kWh then this would be 35 more than the Warranted Use Rate 35 x 1 8 63 reduct
3. 10 000 cycles under the following conditions Temp 25C Current 0 33C 2 Page 11 How long is the warranty and what are other associated conditions While LG Chem expects the battery to last 6000 cycles minimum if not discharged regularly below 90 overall warranty conditions are understandable with a new product much more conservative In general the LGC s warranty for the RESU 6 4EX is 10 years There are detailed warranty conditions available and we recommend studying the warranty document in detail Some key warranty benchmarks are e LGC warrants at least 80 of Nominal Energy of the 6 4EXkWh for 7 years after the date of invoice e LGC warrants at least 60 of Nominal Energy 6 4EXkWh for 10 years after the date of invoice e The ambient temperature during the operation of the Subject of the Warranty must not fall below O C and not exceed 40 C e Battery average state of charge should be maintained within 5 95 at all time e The accumulated discharge energy should not be more than the nameplate energy per day eg 6 4kW 9 6kWh or 12 8kWh to have a long battery life e The unit must never be exposed to a temperature exceeding 50 C e Also in order to take advantage of the 10 year warranty the accumulated discharge energy should not be more than 300 times of Nominal Energy per year e The warranted usable energy will be adjusted every year if the Customer fails to fulfil such requirements according to the following calculations
4. policy and regulatory gap and while we need to check one more time it appears that a CEC accreditation or electrical licence might at this point all that is required to be able to install the unit 21 The unit is currently only IP 21 therefore only suitable for indoor use Will there be a weatherproof version for storage outside While the storage system have inbuilt temperature control LGC currently don t have any specific development plan for such an enclosure But if customer inquiries for such an addition become very high we will consider development of a weatherproof version accessory In regards to temperature control there is no inbuilt temperature control system We are considering these improvements for the next generation system 22 Can the battery status be checked via the inverter Yes the Sunny Island and the associated monitoring equipment will let the user control many battery related functions as well as monitor the battery status There is also currently a smart phone app being developed to monitor the battery A test version of the final APP is available in the google playstore Search for RESU 64 23 What type of battery inverters will the energy storage solution work with We have done matching tests of RESU 6 4 EX with SMA Sunny Island range In Europe the unit also works with NEDAP inverters The BMS uses the CAN communication language so theoretically other hybrid inverter with this language capability
5. EX Obviously the distributors will set the price point but we will be very competitive with other products like Samsung or Tesla now and in the future The RESU 6 4EX will be paired with the SMA Sunny Island range Therefore total price will depend on a number of factors from installation price to SMA costs and out unit We are still working out bulk purchase pricing discounts with SMA We expect that the product will appear in a kit form from Solar Juice for example with the SMA product together Therefore for kit pricing enquiries please for now ask Solar Juice on 02 9725 1111 Overall right now we would expect the units to have a retail price of around 1000 per kW h ex GST plus inverter solution The cost curve will come down over time The 3 2kWh expansion units will be slightly more than 50 of the RESU 6 4 Ex price 4 What maintenance do the RESU 6 4 EX require The battery management system BMS maintains and monitors the health of the battery cell temp voltage current etc and this information is send to the inverter and the customer s energy management system The Sunny Island inverter controls the battery operation automatically via CAN communication so there is no specific maintenance required For more information please have a look at the user manual 1 Page 5 What additional training will be required for example if Bosch systems are installed previous Bosch training is essential A well trained solar installer with som
6. Tell me the how is the best way to handle the product The 6 4kW unit weighs 60kg and cannot be manually handled by a single person so there will need to be space between units to go in with a forklift or pallet jack Can you let us know how the unpacking can be done easily As you can see there are 4 units per pallet they can be moved onto separate small pallets and strapped down for individual distribution With a small trolley units can be handled by one person in the box If they need to be lifted then it is a 2 person job In regards to getting them out of the box the box opened looks like below There is plenty of space on the side to lift product with two persons out of the box Compared to other battery product the battery is actually comparably light 32 How many high can they be stacked Product can be stack and stored up to 2 Pallets of 2 pallets of 4 units each You will see how to stack from the pictures on the previous page 33 What is the required temperature humidity to watch out for etc any other issue to watch Temp and humidity for storage is below Environmental requirements Available operating temperature PC to 40C Optimal operating temperature 15 C to 3C perating relative humidity 75 to 495 Storage temperature S0PC to 50 C Storage relative humidity 257o to 95 34 Anything to tell the transport company or receiving party how to unpack or what to watch out for There is no specific infor
7. allers can install to see how it works Yes LGC will in conjunction with Solar Juice create a short term trial package price for qualified LG network installers interested in trialing the unit The units will arrive in limited numbers in late July early August 2015 The expansion units will only be available late August 2015 The price for 1 to 5 units from Solar Juice for the LG dealers will be S 3900US plus freight from Solar Juice plus GST For the expansion pack please allow please allow SUS 2 100 plus transport and GST Please email solar sales lge com au expressing your interest in purchasing such a unit or multiple units of the RESU 6 4EX plus the expansion pack For Sunny Island pricing to get the kit please also contact Solar Juice on 02 9725 1111 28 Which Sunny Island unit is the best to work with the RESU 6 4EX range We think the 3 0 and 4 3 are fully sufficient and will make the kit cheaper The 6 kW will be working as well but the 8kW plus will not work with the RESU 6 4EX 29 What other SMA products are required to go with the RESU6 4 and Sunny Island kit and what functions do these products perform There are monitor products which form part of the kit Please contact Solar Juice for the full kit description at 02 9725 1111 or email info solarjuice com au 30 How will the goods be delivered Do you have a photo of the inside of the container Please see the picture as attached There are 4 units per pallet 6 Page 31
8. and warranty be affected if the temperature in the RESU 6 4EX rises above 40 C Above 40 C degradation of the battery is accelerated If the ambient temperature during the operation of the product exceed 40 C a number of times or if the product is exposed to a temperature over 50 C the warranty will become void 14 Will time shifting and peak shaving controlled from the energy storage system If the inverter can undertake these functions than the batteries will be able to support this option We understand that the SMA Sunny Island range has this function available More info from SMA to come on this 15 Can the unit be used without renewable energy If the inverter can be charged through the grid it is possible to use batteries without renewable energy 16 What range of capacity will be available RESU 6 4EX has 128Ah capacity If you add an expansion Unit up to two units each one has 64Ah it can be expanded to 256Ah One RESU 6 4 EX will be able to be connected to one phase If there is a three phase property then actually one RESU 6 4EX could be connected to each phase Please consider maximum size with two expansion units will be 12 8kWh per phase 4 Page 17 What clearances does it require from a wall for ventilation There is a detailed installation manual available In regards to wall ventilation a minimum of 20mm is required 18 How can the 6 4kWh be extended RESU 6 4EX was developed to be expandable It can
9. be discharged to 90 If the customer requires a larger unit then two expansion units of 3 6kW h each will be available Maximum 2 units will be available Each unit price wise will be slightly more than 50 of the actual RESU 6 4EX unit It is recommended to buy the expansion units not too many years apart from the initial RESU 6 4 EX unit because if after many years the RESU 6 4 EX finally reaches end of life then as RESU 6 4 has the battery management system embedded the expansion units if there are much newer will still be ok but the system as a whole will stop working So for maximum financial return it important that the unit is sized correctly initially It is recommended that the expansion units are purchased with the RESU 6 4EX initially or within 12 month of the RESU 6 4 EX purchase 19 Is RESU 6 4 considered an UPS If the inverter can undertake the UPS function than it is possible to back up the load up to maximum output of the battery please note the appropriate charge time and discharge times have to be considered 20 What licenses do you require for install There will shortly be a CEC accreditation developed for on grid storage This will be the appropriate qualification Obviously off grid qualifications will be suitable as well to understand the key installation issues for the product We understand nevertheless that even off grid licence holders will have to do some additional course in the future At this point there is a
10. could work with our battery We recommend to 5 Page distributors to sell the RESU 6 4EX with Sunny Island inverters and monitoring as a kit In regards to Sunny Island the new smaller inverter range will work perfectly with RESU 6 4EX 24 Will there be systems for large commercial applications to use for peak shaving If so what is the expected release date for that and what procedure do we need to follow to do this We have another ESS products 19inch rack mounted systems for commercial peak shaving and it is already deployed in many countries The system is ready to come to Australia and need to have engineering discussion for designing capacity and selecting inverters in advance 25 What other storage products batteries does LG Chem consider bringing into Australia Grid Frequency Regulation Spinning Reserve Load Levelling Ancillary Service Commercial ESS high Voltage system 800 1000V Telecommunication base station UPS for Mega data centers and similar 26 Will the RESU 6 4EX work during blackout Currently the RESU 6 4EX works with the Sunny Island In case of blackout the Sunny Island powers down for safety reasons So the answer is NO at the moment but we understand the attraction of such a feature We are committed to have RESU 6 4EX work closely in Australia with the SMA Sunny Island range further information from SMA on this will be coming shortly 27 Will there be special packages so that trained LG inst
11. e overall understanding regarding batteries and off grid knowledge will be able to install the unit following the installation instruction We consider to producing a video regarding installation and also on 9 of June starting at 10 am there will be a webinar in conjunction with SMA as a start to introduce the product For more information please see the news section of Igenergy com au In the future there will be some road shows presentations in partnership with the distributor like Solar Juice and of cause we would love to see SMA involved due to the close working relationship between RESU 6 4 and the Sunny Island range You do not have to have an LG Chem training certificate to install the unit normal off grid qualifications will be sufficient 6 Is nominal energy equivalent to usable energy or is usable energy Depth of Discharge x Nominal Energy Usable discharge energy is calculated as nameplate 6 4kWh Depth of Discharge being 90 maximum Please note according to the set operation range via the inverter the Usable DoD can be changed for example to 80 The lower the DoD the longer the battery life 7 Can you connect multiple units together to provide customers with 10kWh 15kWh options If you add two 3 6kWh expansion units to RESU 6 4EX it will be expanded to 12 8kWh But it is not possible to exceed on one phase the 12 8kWh In the range of 15kWh to 40kWh storage LG Chem will supply only the battery to our partners and they desi
12. gn and offer the full systems 8 Does the unit have an internal Battery Management System Yes it has internal BMS 9 Would these units be consider dangerous goods and therefore need specialist freight Yes it is considered dangerous goods So the fright company has to be informed of the dangerous category The transport arrangements require an additional document to be completed but otherwise it is not too onerous 10 Some information in the previous RESU 5 brochure says the unit will be fine for 5000 cycles 15 years How is a cycle determined I ve been lead to believe that one cycle is one charge and discharge Therefore 365 cycles per year 13 7 years not 15 years One cycle is a charge and discharge But battery degradation is based on cycle life plus calendar life Under 10yrs warranty condition 1day 1cycle is recommended Our new RESU 6 4EX storage battery will last as much as 10 000 plus cycles and yes one cycle is one charge and one discharge But the key to a long battery life is the frequency of cycles of discharge and age of battery When it comes to the warranty we are currently conservative as is usual for a new product We give you a 10 year warranty if total cycles per year are 300 so the overall warranty cycle is 3000 Nevertheless we are certain that even with 600 cycles per year the battery will last for more than 10 years We expect the battery to have reached a limit of 70 capacity by 6000 cycles and 60 by
13. ion 3 Page It is therefore important not to undersize the battery and to size the battery storage size appropriately so that the likely discharged kWh required stay close to the Warranted Use Rate Charge Discharge current management e Using less than 70A is recommended for longer battery life e Using current region between 70A 110A should be limited to 10 minutes per day e The warranted usable energy will be adjusted downward every day the client fails to fulfill such requirements 12 How will the warranty work Will the warranty be handled in Australia There are still a few issues to be finalized We are working with SMA as a partner for this product as the battery works in a kit with the SMA Sunny Island range We will be working with SMA to have service calls and warranty calls go to the SMA service line and then will screened and passed onto the appropriate direction If there are some faults and customer calls installers potentially from the LG dealer network will visit and deal with the issue after they have obtained appropriate training and qualifications If the fault is not able to be fixed on the spot and it is a warranty matter the unit will be replaced and send back to LGC If the unit failed because of abuse then repair work which includes charges will occur In case of warranty the end user will take back a new unit or a refurbished one or could be refunded depending on the circumstances 13 How will the performance
14. ion duration is different above 70A at each current level the battery then BMS commends to inverter to reduce current to 70A for 10min Current A Accumulated Point nen i 90 80 TO TOA Current Limit P Point MaxDuation Example 100 90 5 point 10 10 point 13 180 point 90 80 Then current down to 704 for LOmin Continues Max Current Considering 9 6kWh and 12 8kWh those systems have the same control system and current limitation with 6 4kWh because 6 4kWh has main controller and 3 2kWh is just battery pack to increase capacity 3 2kWh cannot be used without 6 4kWh main system Disclaimer Please note information in this document can change anytime without notice The information has been provided in good faith but please do not base important decisions on this information LG Chem does not take any responsibility for any product claims in this document which are subsequently found to be incorrect Please make you own further enquiries regarding this product and its capabilities 8 Page
15. mation to tell transport company other the usual dangerous goods declaration 35 How does the product discharge what is the shelf life a product can be sold before it might change in quality According to warranty product should not be in shelf more than one year Technically battery is de grade less than 1 of energy per year 36 What are the safety precautions that need to be taken for handling and storage of the units A detailed safety precautions document is available and has been supplied to the distributor 38 Any special transportation requirements Must be shipped in the original package the package is certified as per UN transportation regulation 7 Page 39 Has LG Chem got product planned for customer to see what battery is doing in an App with information coming out of BMS eg charge status how many cycles hottest temperature unit has been exposed to Yes customer is able to see battery status from the new coming App charge status how many cycles hottest temperature unit will be show 40 Is LG battery product useable for load shifting meaning get load from grid at non peak time and then release in peak charge time We are awaiting SMA s input to this question 41 What can you tell me about the nominal discharge The nominal discharge current is 0 3C which we recommend but the system is allowed to use conti nuous 70A which is approx 3 5kW If over 70A is continuously going through for certain durat
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