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Several replies stressed that a standard wall-outlet charge is still demanding.
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A portable power station owner said a routine recharge turned into a frightening close call after plugging a Pecron F5000LFP into an extension cord. 
Hours later, the charging cable had fused to the cord, with the plug’s plastic softened and hardened around it.
The Reddit post in r/Pecron described the problem as user error after the original poster updated it. The owner said they had “made an amateur mistake” by charging through an extension cord and later found the cable stuck to it. In the same warning, they wrote: “Don’t do what I did.”
The owner originally referenced a 3,600-watt figure as the cause of the melted cord. 
One commenter pointed out, “The Pecron f5000lfp will only draw 3600w when using the RV cord to charge. It caps out at 1800w maximum with the standard 5-15 ac cord that plugs into a wall outlet.”
In an update, they wrote that “3600W was an incorrect memory of what happened” and acknowledged that “No way a 15W or 20W breaker could supply 30A.” They ultimately said a cheap extension cord and the decision to use it were to blame.
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Several replies stressed that a standard wall-outlet charge is still demanding. One commenter said that “even with the normal 5-15 cord at 1800w even the OEM Pecron cord gets slightly warm,” while another speculated that the setup may have involved “a 16 gauge 13 Amp extension cord best suited to lamps.”
One commenter reduced the outlet issue to a basic rule: “any device (microwave, iron, heater, whatever) can only pull up to 15A from a typical home outlet.” The same person added a separate safety reminder: “Extension cords must be extended (not coiled or rolled up) when in use.”
Cost savings also came up in the discussion as a use for the battery. 
One commenter said they charge overnight at 18 cents per kilowatt-hour instead of paying 45 or 60 cents later, adding that filling a 10-kilowatt-hour battery pack takes “near 12kWh of grid power.” Using those figures, a full overnight charge could save roughly $3.24 to $5.04 compared with buying the same amount of power at higher rates.
The clearest advice was to avoid light-duty extension cords when charging a large power station. A commenter said owners should “make absolutely sure you are using a 12awg or 10awg extension cord,” adding that “the longer the extension cord the thicker the gauge if wire it should be.”
Some commenters pointed to lowering the charge speed as another way to reduce risk while still taking advantage of off-peak rates. One noted that users can “slow down the charge rate percentage on the settings menu,” while another said they reduced their unit’s maximum rate to 1.5 kilowatts because they did not want to “have to remember that risk.”
The thread also included heavier-duty alternatives for people who still want faster charging. One commenter said, “I installed a new RV socket, 30 amp breaker and maybe half a meter of Romex (the pink stuff) in order to safely charge that beast.” 
The owner’s final update was blunt: “I agree it was a cheap extension cord and my use of it that caused the problem. On to bigger and better things once I get a replacement cable from Pecron.”
These stories look at similar charging-safety issues, including home setup mistakes and the limits of charging from a standard outlet. 
• An EV owner said outlets were melting after improper home-charger wiring choices.
• A Tesla owner sparked backlash after using a kitchen outlet to charge at home.
• U.S. apartment shoppers warned that free plugs are vanishing as EV access tightens.
• In Santa Clarita, drivers returned to destructive trend takes over local charging stations.
• In Portland, an overnight stop ended with a disappointing scene overnight at chargers.
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