The Discover Lithium Battery and Schneider Electric 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)
|
Model |
Inverter Peak
|
Max Continuous Charge |
Max Continuous Discharge |
AES RACKMOUNT 48-48-5120 Recommended per inverter (8) |
HELIOS ESS 52-48-16000 Recommended per inverter (9) |
|---|---|---|---|---|---|
|
XW PRO |
|||||
|
6848 NA 120/240 |
276 A (1) |
140 A |
180 A |
2 |
1 |
|
6848 NA 120 |
278 A (2) |
120 A |
180 A |
2 |
1 |
|
8548 IEC 230 |
267 A (3) |
140 A |
180 A |
2 |
1 |
|
XW+ |
|||||
|
5548 NA 120/240 |
220 A (4) |
110 A |
150 A |
2 |
1 |
|
6848 NA 120/240 |
281 A (5) |
140 A |
180 A |
2 |
1 |
|
7048 E 230 |
200 A (6) |
110 A |
150 A |
2 |
1 |
|
8548 E 230 |
265 A (7) |
140 A |
180 A |
2 |
1 |
(1) Calculated based on max 180 A DC input, 52 A at 240 VAC 60-second output, efficiency 94.1% (CEC), and 140 A DC charger, as published in Schneider Electric data sheets (2022-06).
(2) Calculated based on 180 A DC input, 104 A at 120 VAC 60-second output, efficiency 93.6% (CEC), and 120 A DC charger, as published in Schneider Electric data sheets (2022-06).
(3) Calculated based on max 180 A DC input, 53 A at 230 VAC 60-second output, efficiency 95% (Peak), and 140 A DC charger, as published in Schneider Electric data sheets (2022-06).
(4) Calculated based on max 150 A DC input, 41 A at 240 VAC 60-second output, efficiency 92.5% (CEC), and 110 A DC charger, as published in Schneider Electric data sheets (2017-09).
(5) Calculated based on max 180 A DC input, 52 A at 240 VAC 60-second output, efficiency 93% (CEC), and 140 A DC charger, as published in Schneider Electric data sheets (2017-09).
(6) Calculated based on max 150 A DC input, 40 A at 230 VAC 60-second output, efficiency 95.8% (Peak), and 110 A DC charger, as published in Schneider Electric data sheets (2017-09).
(7) Calculated based on max 180 A DC input, 53 A at 230 VAC 60-second output, efficiency 95.8% (Peak), and 140 A DC charger, as published in Schneider Electric data sheets (2017-09).
(8) 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).
(9) 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).