EG4 Server Rack vs WallMount Batteries: Specifications Side by Side and What We Ran

EG4 LL-S and LifePower4 rack batteries and the Indoor WallMount 280Ah on EG4's own documents. Not a recommendation.

Last reviewed 2026-10-13.

This page records our own experience and what the manufacturer publishes. It is not guidance, instructions or advice. Batteries and mains electricity can cause serious injury, fire and death. Follow the manufacturer's current instructions and a licensed professional. Read the notice at the bottom of this page.

What the manufacturer documents

EG4's LL-S 48V 100Ah specification sheet, version 1.2.5 (model SR-48-100-IN-01), lists 51.2 V, 100 Ah, a maximum continuous charge current of 100 A and a maximum continuous discharge current of 100 A, with 50 A recommended for each, and a bulk/absorb charging voltage of 56.8 V (BMS column) or 56.2 V plus or minus 0.2 V (recommended setting). Its operating table gives voltage and amp hours rather than an energy row; the cover photograph shows a 5120 Wh nameplate and the cover gives 327.7 kWh as a bank total for 64 units. (eg4electronics.com)
The LL-S sheet lists a weight of 99.6 lbs (45.2 kg), dimensions of 6.1 in by 17.4 in by 19.3 in (15.5 cm by 44.2 cm by 49 cm) labelled height by width by depth, RS485 and CAN communication ports, a maximum of 1 unit in series and 64 units in parallel, an E-Stop function, IP20 and an operating altitude below 5000 m. (eg4electronics.com)
The LL-S sheet lists a charging range of 0 to 50 C (32 to 122 F), a discharging range of -20 to 55 C (-4 to 131 F) and a storage range of 0 to 45 C (32 to 113 F). Its cover says the batteries are designed for more than 7,000 deep charge and discharge cycles and more than 15 years at 80 percent depth of discharge daily; it gives no cycle test current or temperature. (eg4electronics.com)
The LL-S sheet lists UL1973 and UL9540A under standards and certifications; its cover prints UL 1973 listed and ETL conforms to UL 9540A. It lists a 10-year warranty marked with an asterisk that points to EG4's warranty registration page, and its cover says the 6 DIP switch option keeps BMS communications for up to 64 batteries. (eg4electronics.com)
EG4's LL-S user manual, version 2.3.3, says inter-battery communications support a maximum of 64 modules for the 6 DIP switch model or 16 modules for the 4 DIP switch model. (eg4electronics.com)
EG4's LifePower4 48V V2 specification sheet, version 1.1.2 (model SR-48-100-LP4-IN-02, the DIP switch design), lists 51.2 V, 100 Ah, a 5.12 kWh nameplate energy capacity, a maximum continuous charge current of 100 A (30 A recommended), a maximum continuous discharge current of 100 A with no recommended value, a bulk/absorb charging voltage of 56.8 V and a 5.12 kW maximum continuous discharge rate. (eg4electronics.com)
The model SR-48-100-LP4-IN-02 sheet lists a weight of 99.6 lbs (45.2 kg), RS485 and CAN ports, a maximum of 1 module in series and 64 in parallel, an E-Stop function, IP20, a charging range of 0 to 45 C (32 to 113 F), a discharging range of -20 to 50 C (-4 to 122 F) and a storage range of -20 to 50 C (-4 to 122 F). It lists no operating altitude. Its dimensions line reads 6.1 in by 19 in by 17.4 in (155 mm by 442 mm by 470 mm); The inch and metric figures it prints do not agree with each other (19 in is about 482.6 mm, not 442 mm; 17.4 in is about 442 mm, not 470 mm), so we cannot say which extent is which. (eg4electronics.com)
The model SR-48-100-LP4-IN-02 sheet says the cells were tested at more than 6,000 deep discharge cycles to 80 percent depth of discharge, and lists a 10-year standard warranty marked with an asterisk that points to EG4's warranty registration page. It lists UL 1973 ETL Recognized Component Certification, UL9540A (Passed) and UL9540 listed with 18kPV-12LV. (eg4electronics.com)
EG4's LifePower4 48V V2 Auto-ID specification sheet, version 1.0 (model SR-48-100-LP4-IN-03, the design without DIP switches, which EG4's quick-start guide calls V3), lists the same 51.2 V, 100 Ah, 5.12 kWh and 99.6 lb figures, a charging voltage of 56.8 V, 100 A maximum continuous charge and discharge with 50 A recommended for each, a maximum of 32 modules in parallel, RS485 and CAN, IP20 and an operating altitude below 5000 m. (eg4electronics.com)
The model SR-48-100-LP4-IN-03 sheet lists a charging range of 0 to 50 C, a discharging range of -20 to 55 C and a storage range of 0 to 45 C, more than 6,000 cycles for the cells tested to 80 percent depth of discharge, a 10-year standard warranty marked with an asterisk that points to EG4's warranty registration page, and UL9540 as pending, listed with 18kPV-12LV. Its dimensions line repeats the same printed figures, with the same inconsistency between inches and millimetres. (eg4electronics.com)
EG4's LifePower4 V2 and V3 quick-start guide, version 1.3.1, covers both models. Its packing list identifies SR-48-100-LP4-IN-02 as the V2 and SR-48-100-LP4-IN-03 as the V3, its specification table gives 64 modules in parallel for the V2 and 32 for the V3, and its text describes the V2 as coming in two designs, with and without DIP switches. The Auto-ID sheet above calls the -03 model V2, so EG4's own naming differs between the two documents. (eg4electronics.com)
EG4's WallMount Indoor 280Ah specification sheet, version 1.1.8, lists a total energy capacity of 14.3 kWh at 25 C and 100 percent state of charge, 51.2 V and 280 Ah, a bulk/absorb charging voltage of 56.0 V plus or minus 0.8 V (BMS column) and 56.2 V plus or minus 0.2 V (recommended setting). (eg4electronics.com)
The WallMount Indoor sheet lists a maximum continuous charge current of 140 A and a maximum continuous discharge current of 140 A, with 200 A maximum continuous for 30 minutes on discharge only, and 60 to 140 A recommended for each. (eg4electronics.com)
The WallMount Indoor sheet lists a weight of 286.6 lbs (130 kg), dimensions of 34.1 in by 18.1 in by 10.4 in (865 mm by 460 mm by 264 mm) labelled height by width by depth, 600 A internal busbars with 4 positive and 4 negative terminals, an on-board LCD touch screen, RS485 and CAN ports, IP20 and an operating altitude below 5000 m. (eg4electronics.com)
The WallMount Indoor sheet lists a charging range of 0 to about 50 C, a discharging range of -20 to about 55 C and a storage range of 0 to about 45 C. It lists a 224 W battery heater with internal battery temperature at or below 0 C (32 F) as heat on and at or above 5 C (41 F) as heat off. It lists a cycle life of more than 8000 cycles at 0.5C and 80 percent depth of discharge, and a design life of more than 10 years. (eg4electronics.com)
The WallMount Indoor sheet lists UL1973 and UL 9540A under safety certifications and a 10-year warranty marked with an asterisk that points to EG4's warranty registration page. It lists no maximum number of units in parallel. (eg4electronics.com)
EG4's WallMount Indoor quick-start guide, version 1.4.0, has a section on installing multiple batteries in parallel and its own limits for using the internal busbars; we do not reproduce them, and the guide should be read for them. (eg4electronics.com)

What happened to us

In our energy comparison we said two Indoor WallMount batteries come to close to 28 kWh and six server rack batteries to about 30 kWh, so the difference was about 2 kWh, and that an exact apples to apples match is not possible. We did not say which rack battery model we meant, and this was rough arithmetic, not a capacity test. (video)
In a 12000XP load test, the 12000XP was fed by two Indoor WallMount batteries in parallel, a stack of EG4 LifePower4 V2 batteries with one LL battery at the top, and a rack of AOLITHIUM batteries (a third-party brand) (two left in that rack), all in parallel. We said the communication was not working for every battery, and that the LifePower4 V2 and LL communications were tied to a WallMount battery. (video)
In that test we read about 245 to 246 A from the batteries in total on a clamp meter whose jaw was too small to close easily around the cable at first, so the reading is approximate. Of that, about 98 A was read on the EG4 LifePower4 stack and about 32 A on the AOLITHIUM rack; the owner confirms the EG4 stack held six batteries (the video does not state the number), and we have not divided these readings per battery. (video)
In our LifePower4 V2 review we showed the V2 with two positive and two negative terminal blocks, a CAN and RS485 connection and six ID DIP switches, next to a V1 and an LL. We said we had set its BMS communication to work with a WallMount battery through its battery communication port and that it appeared to work. (video)
In our WallMount review the battery's screen showed cell voltages close to 3300 mV and about 22 C. We did not tear it down, so what we said about its internals came from its specifications and from other people's teardowns. (video)

Specifications side by side

Per single unit unless a row says bank total, from EG4's documents: LL-S sheet 1.2.5 and manual 2.3.3, LifePower4 V2 sheet 1.1.2 (-02), Auto-ID sheet 1.0 (-03), LifePower4 guide 1.3.1, WallMount Indoor sheet 1.1.8. Not our measurements
Specification	LL-S 48V 100Ah (SR-48-100-IN-01)	LifePower4 (SR-48-100-LP4-IN-02, DIP switches)	LifePower4 (SR-48-100-LP4-IN-03, Auto-ID, no DIP switches)	WallMount Indoor 280Ah
Nominal voltage	51.2 V	51.2 V	51.2 V	51.2 V
Capacity	100 Ah	100 Ah	100 Ah	280 Ah
Energy	Operating table gives V and Ah, no energy row; cover photo shows a 5120 Wh nameplate; cover gives 327.7 kWh bank total for 64 units	5.12 kWh nameplate	5.12 kWh nameplate	14.3 kWh total at 25 C and 100 percent state of charge
Maximum continuous charge current (per unit)	100 A (50 A recommended)	100 A (30 A recommended on this sheet)	100 A (50 A recommended)	140 A (60 to 140 A recommended)
Maximum continuous discharge current (per unit)	100 A (50 A recommended)	100 A (no recommended value listed); 5.12 kW maximum continuous discharge rate	100 A (50 A recommended); 5.12 kW maximum continuous discharge rate	140 A (60 to 140 A recommended); 200 A for 30 minutes
Bulk/absorb charging voltage (BMS column)	56.8 V (56.2 V plus or minus 0.2 V recommended)	56.8 V	56.8 V	56.0 V plus or minus 0.8 V (56.2 V plus or minus 0.2 V recommended)
Weight	99.6 lbs (45.2 kg)	99.6 lbs (45.2 kg)	99.6 lbs (45.2 kg)	286.6 lbs (130 kg)
Dimensions as printed (height by width by depth)	6.1 by 17.4 by 19.3 in (15.5 by 44.2 by 49 cm)	6.1 by 19 by 17.4 in (155 by 442 by 470 mm); the inches and millimetres do not agree with each other, an unresolved inconsistency in EG4's table	Same printed figures and the same inconsistency	34.1 by 18.1 by 10.4 in (865 by 460 by 264 mm)
Charging temperature range	0 to 50 C	0 to 45 C	0 to 50 C	0 to about 50 C
Discharging temperature range	-20 to 55 C	-20 to 50 C	-20 to 55 C	-20 to about 55 C
Storage temperature range	0 to 45 C	-20 to 50 C	0 to 45 C	0 to about 45 C
Internal heater	Not listed on the sheet	Not listed on the sheet	Not listed on the sheet	224 W; heat on at internal battery temperature at or below 0 C, heat off at or above 5 C
Cycle life and its conditions	More than 7,000 deep cycles, 80 percent depth of discharge daily (cover wording; no test current or temperature)	Cells tested at more than 6,000 cycles to 80 percent depth of discharge (no current or temperature given)	Same cell wording as the -02 sheet	More than 8000 cycles at 0.5C and 80 percent depth of discharge; design life more than 10 years
Communication ports	RS485 and CAN	RS485 and CAN	RS485 and CAN	RS485 and CAN, plus an on-board touch screen
Units in parallel (BMS communications)	Sheet 64; manual 64 for 6 DIP switches, 16 for 4 DIP switches	64	32	Not listed on the sheet; see the quick-start guide
Certifications as listed	UL1973, UL9540A (cover prints UL 1973 listed, ETL conforms to UL 9540A)	UL 1973 ETL Recognized Component, UL9540A (Passed), UL9540 listed with 18kPV-12LV	Same, except UL9540 is pending, listed with 18kPV-12LV	UL1973, UL 9540A
Warranty as listed	10 years (asterisk, registration page)	10 years standard (asterisk, registration page)	10 years standard (asterisk, registration page)	10 years (asterisk, registration page)
Ingress protection	IP20	IP20	IP20	IP20

What we did not verify

This page compares manufacturer figures. The only things from our own use are under 'What happened to us'. We make no claim about which battery suits any system, and we do not compare prices, which are not manufacturer specifications.
The WallMount review is dated 2024-05-03, the LifePower4 V2 review 2024-09-20, the 12000XP test 2025-01-31 and the energy short 2025-04-24. We checked the document versions named above on 2026-10-12 and do not know their release dates; EG4's WallMount changelog records changes to weight, operating currents and temperatures over time, so figures in our videos may differ from the current sheet.
The tests behind the cycle figures differ. The 6,000 and 7,000 cycle figures for the rack batteries and the 8000 cycle figure for the WallMount do not come with matching test conditions, and none is a lifetime measurement or a warranty term, so we cannot say they are comparable.
EG4 sells two LifePower4 designs and its documents name them differently: the guide calls the DIP switch model (-02) V2 and the Auto-ID model (-03) V3, while the Auto-ID sheet calls the -03 model V2. The 64 and 32 parallel limits belong to different model numbers. The owner has both a LifePower4 he calls V2 and one he calls V3, but the model numbers were not recorded, so we cannot say which of EG4's model numbers each is; our review video showed a design with six ID DIP switches.
EG4's documents also differ in a recommended charge current for the DIP switch design (30 A on sheet 1.1.2, 50 A in guide 1.3.1), and EG4's printed LifePower4 dimensions do not agree with each other in units. We cite the model sheets and do not choose between them.
The WallMount quick-start guide has a general statement in its installation section that the battery can charge and discharge up to 200 A before the BMS shuts off. We do not use it: it differs from the sheet's 140 A continuous rating with 200 A on discharge for 30 minutes, and we have not tested what the BMS does.
The owner confirms the rack battery we ran is the LL-S, which is the model of the EG4 sheet we cite (SR-48-100-IN-01); we have not checked our unit's model label against that sheet. EG4 also lists other LL documents.
Our videos used confident titles. Statements such as 'the battery to get' are opinions and are not repeated here. Our WallMount review gave about 282 lbs and a 15-year design claim; EG4's sheet 1.1.8 lists 286.6 lbs and a design life of more than 10 years. These are different claims from different dates and we do not say the earlier one was false.
In our LifePower4 V2 review we said six DIP switches allow up to 64 batteries and that the V2 is rapid shutdown compatible. The documents we read list an E-Stop function but do not state rapid shutdown compatibility for it, and we did not verify rapid shutdown.
Our 12000XP test was a single setup in which communication was not working for every battery. We do not claim that mixing WallMount, EG4 rack and third-party batteries is supported; EG4's documents discuss some mixed EG4 rack communications with conditions, and we did not check them against our setup.
We have not seen the UL certificates or test reports for any of these batteries; the certifications are as EG4's documents list them. We did not test the WallMount heater.

Questions and answers

How much energy does each battery list?

EG4 lists 5.12 kWh nameplate for the LifePower4 and 14.3 kWh at 25 C and 100 percent state of charge for the WallMount Indoor 280Ah. The LL-S sheet's operating table gives 51.2 V and 100 Ah, and its cover photograph shows a 5120 Wh nameplate.

Do they list the same voltage and warranty?

All list 51.2 V and a 10-year warranty. Every one of those warranty entries is marked with an asterisk that points to EG4's warranty registration page, and we have not seen the terms.

Do the WallMount and the rack batteries list the same temperature ranges?

Not all of them. The LL-S, the LifePower4 -03 and the WallMount list charging from 0 to about 50 C and discharging from -20 to about 55 C. The LifePower4 -02 lists 0 to 45 C and -20 to 50 C. Only the WallMount lists an internal heater.

Which communication ports do they list?

All list RS485 and CAN. The WallMount also has an on-board touch screen.

Which should I buy?

We do not make that recommendation. Their specifications are listed above.

Sources

Videos this comes from

Battery Capacity SECRETS: Wall Mount vs. Server Rack - SHOCKING Difference! – Our energy comparison of WallMount and server rack batteries
#eg4 12000XP #offgrid #inverter Level 2 full charging #tesla | Tesla wall charger 48A – A 12000XP load test fed by WallMount, LifePower4 V2, LL and third-party rack batteries
EG4 LifePower4 V2 Server Rack Battery Review | 48V 100AH UL1973 UL9540A – Our review of the LifePower4 V2 rack battery, shown beside the V1 and LL
EG4-WallMount Indoor Battery Review | 48V 280Ah | 14.3kWh | Indoor | Heated UL1973, UL9540A – Our review of the Indoor WallMount 280Ah battery

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Important notice

This page records what the manufacturer publishes and what happened on equipment that TGBATG owns and used, as of the date shown. It describes what we did and saw, not what you should do. It is our experience only. It is not instructions, directions, a design, engineering, electrical or professional advice, and not a recommendation to buy, install, change or repair anything. We are not your engineer, electrician or installer.

Equipment, firmware, apps and manufacturers' instructions change without notice, and results differ with the exact parts, versions, settings and surroundings. What worked or failed for us may not work, or may be unsafe, for you. Updating firmware or changing settings can stop equipment working.

Batteries and mains-voltage electricity can cause serious injury, electric shock, fire and death. Read and follow the manufacturers' current instructions and warnings for every part, follow your local electrical code, and use a licensed professional where the work or permits require one. Contact the manufacturer's support before you change firmware or settings you are not sure about. Do not rely on this page.

We list above some things we did not verify. Even for what we did, we may have made mistakes or left things out. We cannot guarantee that this page is accurate, complete or current, or suitable for your use. It is provided as is, and you use it at your own risk. To the fullest extent the law allows, TGBATG is not responsible for loss, damage or injury that results from anyone relying on it.

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