The Mastervolt MLI Ultra 12/3000 is a battery pack with a nominal voltage of 13,2 V, a rated capacity of 230 Ah, 3000 Wh of energy, Lithium Iron Phosphate – LiFePO4 cells, a continuous discharge of 200 A, a peak of 1800 A (10 sec.) and 3500 cycles.
Last updated: 8 October 2026
Battery and charging
- Energy
- 3000 Wh
- Voltage
- 13,2 V
- Rated capacity
- 230 Ah
- Chemistry
- Lithium Iron Phosphate – LiFePO4
- Rated charge cycles
- 3500 cycles at 80 % DOD at 25 ⁰C, max. C/3 charge and C/2 discharge
- Maximum continuous discharge
- 200 A
- Peak discharge
- 1800 A (10 sec.)
- Recommended charging
- ≤ 80 A
- Maximum discharge current, as the maker labels it
- 500 A
“Nominal battery energy capacity 3000 Wh”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Nominal battery voltage 13,2 V”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Nominal battery capacity 230 Ah”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Battery chemistry Lithium Iron Phosphate – LiFePO4”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Cycle life 3500 cycles at 80 % DOD at 25 ⁰C, max. C/3 charge and C/2 discharge”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Max. continuous discharge current 200 A”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Peak discharge current 1800 A (10 sec.)”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Recommended charge current ≤ 80 A”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Maximum discharge current (20 mins @ 25 °C) 500 A”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
Battery care and safety
- Ingress protection
- IP65 (electronics cabinet)
“Protection degree IP65 (electronics cabinet)”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
Size and fit
- Overall dimensions
- 341 x 197 x 355 mm 13.4 x 7.8 x 14.0 inch
- Terminals
- M8
- Stated weight
- 25,4 kg 56.0 lb
- Which way up it may be fitted
- Upright or either long side
- Series and parallel connection
- Yes, up to 10 batteries; over 48 V needs a separate battery box
“Max. outer dimensions (incl. terminals/grip handles), lxwxh 341 x 197 x 355 mm 13.4 x 7.8 x 14.0 inch”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Terminals M8”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Product weight 25,4 kg 56.0 lb”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Mounting position Upright or either long side”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Series connection yes, up to 10 batteries - systems with a voltage above 48 V require a separate battery box to prevent access to high-voltage components”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
Other findings
- Allowed max charge current
- 230 A
- Parallel connection
- Yes, unlimited
- Recommended discharge current
- ≤ 200 A
- Safety relay
- To be added mandatorily
“Max. charge current 230 A”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Parallel connection Yes, unlimited”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Recommended Continuous Discharge Current ≤ 200 A”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
“Safety relay To be added mandatorily”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
Certification claims
- Product compliance claim
- CE, E-Mark, UL1642 (cells only), FCC, RVIA compliant
“Compliance CE, E-Mark, UL1642 (cells only), FCC, RVIA compliant”
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
Sources
- Archived document
Source: mastervolt.com/products/li-ion/mli-ultra-12-3000
Retrieved October 8, 2026