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Yeagulch 12.8V 200Ah LiFePO4 Battery

A 2560Wh lithium house battery can make van power feel normal, but only when the charger, fuse, wire, inverter, shunt, and mounting are planned as one electrical system.

Yeagulch 12.8V 200Ah LiFePO4 Battery product photo
LiFePO4200Ah12V power
Overview

A 200Ah LiFePO4 battery is not a gadget. It is the center of a small electrical system, and the system around it decides whether it is useful or sketchy.

The Yeagulch 12.8V 200Ah battery is advertised as a 2560Wh deep-cycle LiFePO4 battery for RV, solar, marine, and camping use. That is enough capacity for a fridge, roof fan, lights, USB charging, water pump, and modest inverter use if the loads are honest and the recharge plan is real.

The important catch is that a battery this size does not make the rest of the build optional. It needs a main fuse or breaker near the battery positive, cable sized for the actual current, a lithium-compatible charger, a shunt or monitor, and a secure mount that keeps the case and terminals protected.

I would also verify the label and current manual before sizing a large inverter. The public Yeagulch listing describes a 200Ah battery but mixes BMS/current language in a way that deserves confirmation before anyone assumes a heavy continuous load is fine.

Best forVan house power, trailer electrical builds, fridges, fans, lights, pumps, and 12V systems with proper distribution.
Not forStarting engines, mystery wiring, unfused inverter leads, or cold-weather charging without temperature protection.

The amp-hours are the easy part. The fuse, wire, charger, and load math are where the build becomes real.

Where to Buy

Yeagulch 12.8V 200Ah LiFePO4 Battery

A high-capacity lithium house battery for van, trailer, and off-grid 12V systems where the supporting electrical design is already part of the plan.

Direct product link for current details and pricing.

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Quick Read
Role
House battery
Best Fit
A planned van or trailer house system with DC distribution, monitored charging, and protected inverter wiring
Why It Works
About 2.56 kWh of nominal storage in one battery, with far better usable capacity than lead-acid
Skip If
You only need phone charging, do not know your load budget, or are not ready to build the protection around it
At a Glance
Energy
Advertised at 12.8V, 200Ah, and 2560Wh nominal capacity.
Charge Voltage
Seller lists 14.6V charging; use a charger or controller with a LiFePO4 profile.
Charge Current
Yeagulch recommends 20-50A charging current on the product page.
Cold Limit
Do not charge below freezing unless the current manual confirms low-temp charging protection.
Main Fuse
Fuse the positive lead near the battery; the fuse protects the cable, so size it to the wire and load.
Not A Starter
The seller says not to use this battery for engine starting, golf carts, jacks, or starter loads.
Build Context

A clean 12V house system usually looks like battery, main fuse or breaker, disconnect, shunt on the negative side, positive and negative bus bars, then separate fused branches for the inverter, DC fuse block, solar controller, and DC-DC charger. That layout makes troubleshooting possible and keeps one device failure from turning the whole cabinet into a mystery.

For inverter planning, start with current rather than watts. A large 12V inverter can pull very high current from the battery, especially as voltage falls, and that current has to be within the battery/BMS rating, cable ampacity, fuse rating, disconnect rating, and terminal hardware. If those numbers are not known, the inverter is too big for the plan.

Install Checks
Load Budget
List fridge, fan, lights, pump, laptop, inverter loads, and daily run time before choosing capacity.
Charging
Match shore charger, DC-DC charger, and solar controller settings to LiFePO4 voltage and current limits.
Protection
Protect every positive feed, especially inverter and charger cables that connect directly to the battery bus.
Mounting
Secure the 40-plus-pound case so it cannot slide, tip, crush cables, or expose terminals in a hard stop.
My Notes

This is the point where the electrical system deserves a diagram. The battery should not be the first or last thing you think about; it has to match the loads, chargers, wire, fuses, BMS limits, and mounting.

  • Put the main fuse or breaker close to the positive battery connection, then fuse downstream branch circuits by wire size and load.
  • Use a lithium-compatible DC-DC charger or solar controller instead of hoping the BMS fixes a bad charging setup.
  • Do not charge below freezing unless the specific battery/manual confirms low-temperature charge cutoff or active heating.
  • Do not buy a big inverter just because the battery is 200Ah; confirm continuous discharge rating, surge behavior, cable size, fuse type, and terminal torque first.
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