Minimum Battery System Capacity
The Discover Lithium Battery and Deye device automatically manage the battery charge and discharge rates. Using large solar arrays with battery banks that are too small can exceed the operating limits of the battery to charge and possibly lead to the BMS triggering over-current protection. Battery capacity must accept the maximum charge current of the system, or charging must be curtailed below the operating limit of the installed batteries. Derive this value by adding together the charge capacities of all inverter-chargers and solar charge controllers in the system. Additionally, battery peak capacity must support the surge requirements demanded by the load attached to the inverter-charger. Match all inverter-charger peak power values with the sum of all battery peak current values.
Inverter Peak = (Inverter Surge Value) / (Inverter Efficiency) / (48V: Low Battery Cut-Off)
Single-Phase Models | Inverter Peak | Max Continuous Charge | Max Continuous Discharge | AES RACKMOUNT 48-48-5120/ 48-48-5120-H Recommended per inverter (7) | HELIOS ESS 52-48-16000 Recommended per inverter (8) |
|---|---|---|---|---|---|
SG01 Series | |||||
SUN-5K-SG01LP1-US | 213 A (1) | 120 A | 120 A | 2 | 1 |
SUN-6K-SG01LP1-US | 256 A (1) | 135 A | 135 A | 2 | 1 |
SUN-7.6K-SG01LP1-US/EU | 324 A (1) | 190 A | 190 A | 2 | 2 |
SUN-8K-SG01LP1-US/EU | 342 A (1) | 190 A | 190 A | 2 | 2 |
SUN-12K-SG01LP1 | 512 A (2) | 220 A | 220 A | 3 | 2 |
SUN-14K-SG01LP1 | 598 A (2) | 250 A | 250 A | 3 | 2 |
SUN-16K-SG01LP1 | 683 A (2) | 290 A | 290 A | 4 | 3 |
SG02 Series | |||||
SUN-7.6K-SG02 LP1-EU-AM2 | 324 A (3) | 190 A | 190 A | 2 | 2 |
SUN-8K-SG02 LP1-EU-AM2 | 342 A (3) | 190 A | 190 A | 2 | 2 |
SUN-10K-SG02 LP1-EU-AM3 | 427 A (3) | 220 A | 220 A | 3 | 2 |
SUN-12K-SG02 LP1-EU-AM3 | 512 A (3) | 250 A | 250 A | 3 | 2 |
SG03 Series | |||||
SUN-3.6K-SG03LP1-EU | 154 A (4) | 90 A | 90 A | 1 | 1 |
SUN-5K-SG03LP1-EU | 213 A (4) | 120 A | 120 A | 2 | 1 |
SUN-6K-SG03LP1-EU | 256 A (4) | 135 A | 135 A | 2 | 1 |
SG04 Series | |||||
SUN-3K-SG04LP1-EU | 128 A (5) | 70 A | 70 A | 1 | 1 |
SUN-3.6K-SG04LP1-EU | 154 A (5) | 90 A | 90 A | 1 | 1 |
SUN-5K-SG04LP1-EU | 213 A (5) | 120 A | 120 A | 2 | 1 |
SUN-6K-SG04LP1-EU | 256 A (5) | 135 A | 135 A | 2 | 1 |
SG05 Series | |||||
SUN-3.6K-SG05LP1-EU | 154 A (6) | 90 A | 90 A | 1 | 1 |
SUN-5K-SG05LP1-EU | 213 A (6) | 120 A | 120 A | 2 | 1 |
SUN-6K-SG05LP1-EU | 256 A (6) | 135 A | 135 A | 2 | 1 |
SUN-7.6K-SG05LP1-EU | 324 A (6) | 190 A | 190 A | 2 | 1 or 2 (9) |
SUN-8K-SG05LP1-EU | 342 A (6) | 190 A | 190 A | 2 | 1 or 2 (9) |
(1) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-5/6/7.6/8K-SG01LP1-EU Hybrid Inverter User Manual (Ver: 2.2, 2023-12-06).
(2) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-12/14/16K-SG01LP1-EU Hybrid Inverter User Manual (Ver. 2.2, 2024-02-03).
(3) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye Hybrid Inverter SUN-7.6/8K-SG02LP1-EU-AM2 SUN-10/12K-SG02LP1-EU-AM3 datasheet (downloaded from the website 2024-04-11).
(4) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-3.6/5/6K-SG03LP1-EU Hybrid Inverter User Manual (Ver: 2.2, 2024-03-28).
(5) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-3K-SG04LP1-24-EU, SUN-3/3.6/5/6K-SG04LP1-EU Hybrid Inverter User Manual (Ver: 2.2, 2024-03-29).
(6) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-3.6/5/6/7.6/8K-SG05LP1-EU Hybrid Inverter User Manual (Ver: 2.2, 2024-03-26).
(7) Discover AES RACKMOUNT 48-48-5120/48-48-5120-H Battery, Peak Power: 218 A RMS (3 seconds), 95 A DC Continuous Charge/Discharge, as published in Discover AES RACKMOUNT Installation and Operation Manual (805-0043 Rev F).
(8) Discover HELIOS ESS Battery, Peak Discharge Current: 300 A RMS (15 seconds), 200 A DC Max Continuous Charge/Discharge, as published in Discover HELIOS ESS Installation and Operation Manual (805-0090 Rev E).
(9) HELIOS ESS supports the maximum continuous charge and discharge currents from this inverter. To use one battery, limit the heavy loads that are active at any time on the system. If the peak current of loads on the circuit will push the inverter and batteries to their maximum limits, consider increasing the number of batteries.
Inverter Peak = (Inverter Surge Value) / (Inverter Efficiency) / (48V: Low Battery Cut-Off)
Split-Phase / Three-Phase Models | Inverter Peak | Max Continuous Charge | Max Continuous Charge | AES RACKMOUNT 48-48-5120/ 48-48-5120-H Recommended per inverter (2) | HELIOS ESS 52-48-16000 Recommended per inverter (3) |
|---|---|---|---|---|---|
SG02 Series | |||||
SUN-5K-SG02LP2-US-AM2 | 213 A (1) | 120 A | 120 A | 2 | 1 |
SUN-6K-SG02LP2-US-AM2 | 256 A (1) | 135 A | 135 A | 2 | 1 |
SUN-7.6K-SG02LP2-US-AM2 | 324 A (1) | 190 A | 190 A | 2 | 1 or 2 (4) |
SUN-8K-SG02LP2-US-AM2 | 342 A (1) | 190 A | 190 A | 2 | 1 or 2 (4) |
SUN-10K-SG02LP2-US-AM3 | 427 A (1) | 220 A | 220 A | 3 | 2 |
SUN-12K-SG02LP2-US-AM3 | 512 A (1) | 250 A | 250 A | 3 | 2 |
(1) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye Hybrid Inverter SUN-5/6/7.6/8K-SG02LP2-US-AM2 SUN-10/12K-SG02LP2-US-AM3 datasheet (downloaded from the website 2024-04-11).
(2) Discover AES RACKMOUNT 48-48-5120/48-48-5120-H Battery, Peak Power: 218 A RMS (3 seconds), 95 A DC Continuous Charge/Discharge, as published in Discover AES RACKMOUNT Installation and Operation Manual (805-0043 Rev F).
(3) Discover HELIOS ESS Battery, Peak Discharge Current: 300 A RMS (15 seconds), 200 A DC Max Continuous Charge/Discharge, as published in Discover HELIOS ESS Installation and Operation Manual (805-0090 Rev E).
(4) HELIOS ESS supports the maximum continuous charge and discharge currents from this inverter. To use one battery, limit the heavy loads that are active at any time on the system. If the peak current of loads on the circuit will push the inverter and batteries to their maximum limits, consider increasing the number of batteries.
Inverter Peak = (Inverter Surge Value) / (Inverter Efficiency) / (48V: Low Battery Cut-Off)
Three-Phase Models | Inverter Peak | Max Continuous Charge | Max Continuous Charge | AES RACKMOUNT 48-48-5120/ 48-48-5120-H Recommended per inverter (4) | HELIOS ESS 52-48-16000 Recommended per inverter (5) |
|---|---|---|---|---|---|
SG04 Series | |||||
SUN-5K-SG04LP3 | 213 A (1) | 120 A | 120 A | 2 | 1 |
SUN-6K-SG04LP3 | 256 A (1) | 150 A | 150 A | 2 | 1 |
SUN-8K-SG04LP3 | 342 A (1) | 190 A | 190 A | 2 | 1 or 2 (6) |
SUN-10K-SG04LP3 | 427 A (1) | 210 A | 210 A | 3 | 2 |
SUN-12K-SG04LP3 | 512 A (1) | 240 A | 240 A | 3 | 2 |
SG05 Series | |||||
SUN-3K-SG05LP3-EU-SM2 | 128 A (2) | 70 A | 70 A | 1 | 1 |
SUN-4K-SG05LP3-EU-SM2 | 171 A (2) | 95 A | 95 A | 1 | 1 |
SUN-5K-SG05LP3-EU-SM2 | 213 A (2) | 120 A | 120 A | 2 | 1 |
SUN-6K-SG05LP3-EU-SM2 | 256 A (2) | 135 A | 135 A | 2 | 1 |
SUN-8K-SG05LP3-EU-SM2 | 342 A (3) | 190 A | 190 A | 2 | 1 or 2 (6) |
SUN-10K-SG05LP3-EU-SM2 | 427 A (3) | 210 A | 210 A | 3 | 2 |
SUN-12K-SG05LP3-EU-SM2 | 512 A (3) | 240 A | 240 A | 3 | 2 |
(1) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye SUN-5/6/8/10/12K-SG04LP3-EU Hybrid Inverter User Manual (Ver. 2.2, 2024-01-26).
(2) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye Three Phase Hybrid Inverter SUN-3/4/5/6K-SG05LP3-EU-SM2 datasheet (downloaded from the website 2024-04-11).
(3) Calculated based on the peak power of 2 times rated power (10 seconds) and max efficiency of 97.6% as published in Deye Three Phase Hybrid Inverter SUN-8/10/12K-SG05LP3-EU-SM2 datasheet (downloaded from the website 2024-04-11).
(4) Discover AES RACKMOUNT 48-48-5120/48-48-5120-H Battery, Peak Power: 218 A RMS (3 seconds), 95 A DC Continuous Charge/Discharge, as published in Discover AES RACKMOUNT Installation and Operation Manual (805-0043 Rev F).
(5) Discover HELIOS ESS Battery, Peak Discharge Current: 300 A RMS (15 seconds), 200 A DC Max Continuous Charge/Discharge, as published in Discover HELIOS ESS Installation and Operation Manual (805-0090 Rev E).
(6) HELIOS ESS supports the maximum continuous charge and discharge currents from this inverter. To use one battery, limit the heavy loads that are active at any time on the system. If the peak current of loads on the circuit will push the inverter and batteries to their maximum limits, consider increasing the number of batteries.