200Ah LiFePO4 Battery Packs
A 200Ah LiFePO4 battery is where a single module stops being a component and becomes the whole system. At 51.2 V it stores about 10 kWh — enough to carry an average household through the night, or to run a workshop, a telecom cabinet or a large off-grid load without stacking packs. Coremax builds the 200Ah class at 12.8 V, 25.6 V, 51.2 V and 96 V.
The figures below are the ones published on each model’s own specification table. Where a model has no published value we say so rather than filling the cell with a plausible number.
200Ah models and their published specifications
| Model | Nominal voltage | Capacity | Energy | Continuous discharge | Weight | Format | Compliance |
|---|---|---|---|---|---|---|---|
| 51.2V 200Ah wall-mounted home ESS CMX48200W family — listed as CMX48200W, CMX48200W-2, CMX48200W-1 | 51.2 V | 200 Ah @ 0.5C | ≥10 kWh | 100 A (charge and discharge) | ≤90 kg | 16S2P, wall-mounted, 58.4 V max / 40 V min | QC/T 743; GBT (cell) |
| 10 kWh HomeGrid-style wall pack CMX48200W-S | 51.2 V | 200 Ah @ 0.5C | ≥10 kWh | 100 A | ≤98 kg | 16S2P of 3.2 V 100 Ah LFP cells, wall-mounted | QC/T 743; GBT (cell) |
| 51.2V 200Ah server rack module cmx48200-SR-screen | 51.2 V | 200 Ah | ~10 kWh | on application | on application | 19″ rack with front display | on application |
| 25.6V 200Ah solar pack cmx24200A | 25.6 V | 200 Ah | 5120 Wh | on application | 48 kg | 500 × 450 × 145 mm, >8000 cycles | CE, ISO, UN38.3, MSDS |
| 12.8V 200Ah pack cmx12200 | 12.8 V | 200 Ah | 2400 Wh | on application | 20 kg | 484 × 170 × 240 mm, >3000 cycles | CE, ISO, UN38.3, MSDS |
| 96V 200Ah power pack 96v lithium 200ah | 96 V | 200 Ah (100 / 200 / 250 Ah options) | on application | 100 / 200 / 300 A options | ≤100 kg | 30S, Bluetooth BMS with temperature sensor, 109 V max / 75 V min | QC/T 743; GBT (cell) |
Capacity is quoted at 0.5C discharge. Discharge current figures are at 25 °C and 50% SOC, beginning of life. Weight and dimensions are per module, not per pallet.
What 10 kWh actually runs
A 51.2 V 200Ah module publishes roughly 10 kWh nominal. Taking inverter losses and a sensible depth-of-discharge reserve into account, plan on 8–9 kWh of usable energy. That translates to:
| Load | Runtime on ~9 kWh usable | Where it turns up |
|---|---|---|
| 100 W | about 90 hours | Lighting, routers, controls, overnight baseload |
| 300 W | about 30 hours | Fridge, pumps, small office loads |
| 1 kW | about 9 hours | Evening household peak, workshop tools |
| 2 kW | about 4.5 hours | Kettle, hob, air conditioning, welder duty |
| 3 kW | about 3 hours | Whole-house surge, large motor starts |
Two things move those numbers. Inverter losses mean the battery delivers more than the appliance consumes, and low temperature reduces both capacity and charge acceptance. A 10 kWh bank in an unheated northern shed is not the same asset as one in a plant room.
100Ah or 200Ah?
Both are 16-series packs at 51.2 V; the 200Ah version is 16S2P — two parallel strings of sixteen cells — rather than sixteen larger cells. That has consequences beyond the headline number.
| 100 Ah module | 200 Ah module | |
|---|---|---|
| Energy at 51.2 V | ~5.12 kWh | ~10 kWh |
| Cell layout | 16S1P — 16 cells | 16S2P — 32 cells |
| Published continuous current | 50 A | 100 A |
| Published weight | ≤48 kg | ≤90 kg |
| Handling | One person, wall or floor | Two people or a lift; fix into structure |
| Best when | You may grow later, or access is tight | You already need 8 kWh or more |
The practical rule: if you already know you need more than about 6 kWh, buy 200Ah. One module means one BMS, one set of cables, one commissioning visit and one warranty. Two 100Ah modules cost less to ship and fit through narrower doors, and they let you start at 5 kWh and grow.
Reading the spec sheet on a 200Ah pack
16S2P, and why it matters
Sixteen cells in series at 3.2 V nominal gives 51.2 V; the “2P” means two of those strings in parallel inside one case. The electrical window is the same as a 100Ah pack — 58.4 V at full charge, 40 V at the bottom — so your inverter settings do not change. What changes is current capability: our 51.2 V 200Ah modules publish 100 A continuous discharge and 100 A continuous charge, double the 50 A of the 100Ah module, because the current is split across two strings.
Weight is the real constraint
Our wall-mounted 51.2 V 200Ah modules publish ≤90 kg (and ≤98 kg on the HomeGrid-style listing). That is a two-person lift and it needs to be fixed into structure, not plasterboard. The 25.6 V 200Ah pack is 48 kg and the 12.8 V 200Ah pack is 20 kg — both are realistically a one-person job. Decide the mounting before you order, because it is far cheaper to specify the right bracket than to revisit an installation.
Temperature and charge windows
The 51.2 V modules publish a 0 °C charge minimum, −20 °C discharge minimum and a 55 °C maximum, read by an on-board temperature sensor. Charging below 0 °C has to be blocked by the BMS; discharging in the cold is fine. If the installation is unheated, ask us to confirm the figure for the exact model.
Cycle life is model-specific and worth asking about
Our 12.8 V 200Ah pack publishes >3000 cycles and the 25.6 V 200Ah pack publishes >8000 cycles. That gap is real and it comes from cell selection and depth-of-discharge assumptions, not from marketing. Ask for the number attached to the model you are buying, and ask what depth of discharge it assumes.
Sizing a 200Ah bank
Work backwards from the load:
Ah required = (load watts × runtime hours) ÷ system voltage
A 1 kW load for 8 hours on a 51.2 V system needs about 156 Ah — inside a single 200Ah module with headroom. The same load on a 12.8 V system needs about 625 Ah, which is three 200Ah packs in parallel and a lot of copper. That is the argument for higher system voltage at this capacity: it is not the battery cost that changes, it is the cable and the install time.
What people get wrong at this size
- Under-specifying the cable and the fuse. 100 A continuous at 51.2 V is not a car-battery cable run. Size conductors for continuous current, not for peak.
- Mounting into the wrong wall. At 90 kg the fixing matters more than the battery.
- No service access. Leave space to reach the terminals and to read the display.
- Assuming one module will cover growth. If the load is likely to double, specify for paralleling now rather than retrofitting a mixed bank later.
- Matching a 200Ah module to a charger sized for 100Ah. Continuous charge current is published at 100 A on the 51.2 V modules; the charger has to be able to use it or recharge times stretch.
Typical applications at 200Ah
- Whole-home solar storage — a single 51.2 V 200Ah wall module at ~10 kWh against a hybrid inverter.
- Off-grid cabins and small commercial loads — where one module covers the evening peak and recharges next day.
- Telecom and UPS — 48 V banks sized for autonomy in hours rather than cycles.
- Large caravans, boats and mobile workshops — 12.8 V and 25.6 V packs where 20–48 kg is still liftable.
- Traction and industrial EVs — 96 V builds where continuous current matters more than energy.
OEM and ODM options
At 200Ah the case, the terminals and the communications matter as much as the cells. We build to your voltage, capacity, case dimensions, IP requirement, communication protocol (CAN, RS485), Bluetooth monitoring, terminal type, label artwork and packaging. See the custom pack design service for how a project runs from enquiry to production.
What to send us for a fast quote
- System voltage and target capacity, or the kWh and runtime you need.
- Continuous and peak current, including surge.
- Mounting: wall, floor or rack — and what the wall is made of.
- Case constraints — dimensions, IP rating, terminal type.
- Communication: CAN or RS485, and which inverter it must talk to.
- Quantity, target market, and the certification that market requires.
Frequently asked questions
How many kWh is a 200Ah battery?
At 51.2 V, roughly 10 kWh. At 25.6 V it is 5.12 kWh and at 12.8 V it is 2.4 kWh. Multiply nominal voltage by amp-hours and divide by 1,000 — the Ah figure alone tells you nothing.
Can I parallel two 200Ah modules?
Yes on the 51.2 V wall and rack modules, and the permitted unit count is model-specific — tell us the target capacity and we will confirm what the BMS supports. Modules must be at similar state of charge before you connect them.
Is 200Ah better value than 2 × 100Ah?
Usually, once installation is counted: one BMS, one cable set, one commissioning visit. Two 100Ah modules win on shipping, handling and staged build-out.
How heavy is a 200Ah LiFePO4 pack?
Our wall-mounted 51.2 V 200Ah modules publish ≤90 kg (≤98 kg on the HomeGrid-style listing). The 25.6 V pack is 48 kg and the 12.8 V pack is 20 kg.
What cycle life do you publish?
Model-specific: >3000 cycles on the 12.8 V 200Ah pack and >8000 cycles on the 25.6 V 200Ah pack. Ask for the figure for the model you are quoting, and what depth of discharge it assumes.
Can I charge it below freezing?
Not without low-temperature charge protection. The published charge minimum is 0 °C and the BMS has to enforce it. Discharge down to −20 °C is fine.
Do you offer OEM and ODM builds?
Yes — custom voltage, capacity, casing, communication protocol, Bluetooth monitoring and private-label branding are standard production options.
Can you help size a bank for a specific project?
Yes. Send the load, runtime, system voltage and site conditions and we will size the bank and quote the configuration.
Request a quote
Tell us the voltage, capacity, quantity and application and we will come back with a configuration, lead time and price. If you are unsure whether 100Ah or 200Ah is the right step, describe the load and runtime and we will size it for you.
Prefer email or chat? Reach us via the contact page.
Related: 100Ah LiFePO4 batteries · 48V lithium battery packs · 12V LiFePO4 batteries · BMS · certifications