Inveter question when on AC

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Papie123

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Hi. O just got an Fivestar 2kw inverter as in the photo. Just one question. It doesnt seem to limit the load when on AC power. I can draw more than 2kw without any warning. When Im battery power it does limit me to 2kw draw and shutdown when I exceed that. Im just worried that I might damage something internal when drawing more than 2kw without realizing it when on AC power seeing as the internal are rated for 2kw. Hope you guys know what I mean.


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What size are the batteries? I would be more concerned about damaging them when drawing more than 2000 Watts of power. Pics?
 
Papie123 said:
Hi. O just got an Fivestar 2kw inverter as in the photo. Just one question. It doesnt seem to limit the load when on AC power. I can draw more than 2kw without any warning. When Im battery power it does limit me to 2kw draw and shutdown when I exceed that. Im just worried that I might damage something internal when drawing more than 2kw without realizing it when on AC power seeing as the internal are rated for 2kw. Hope you guys know what I mean.


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It probably has a pass through and will be rated for what the cable that plugs at the wall is rated for, probably 15A or 3.5kW.
 
Add a fuse to the output (sand fast blow 10A) - then there is no thinking and any mistake only costs you R5, as opposed to a new inverter.
 
UB40 said:
What size are the batteries? I would be more concerned about damaging them when drawing more than 2000 Watts of power. Pics?
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When on battery mode. I cant draw more than 2000w. It then shuts down. But when eskomis available it doesnt draw power from the battery. But my battery is lalela 80ah 24v.
 
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TheChamp said:
It probably has a pass through and will be rated for what the cable that plugs at the wall is rated for, probably 15A or 3.5kW.
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Allright. So if I understand correctly. On inverter mode (no eskom) it will be limited to 2kw as it is. But on passthrough its basically acting like an extension cord and not going throught the internals as much as its not drawing anything from the battery?
 
Papie123 said:
Allright. So if I understand correctly. On inverter mode (no eskom) it will be limited to 2kw as it is. But on passthrough its basically acting like an extension cord and not going throught the internals as much as its not drawing anything from the battery?
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Exactly.
 
Papie123 said:
When on battery mode. I cant draw more than 2000w. It then shuts down. But when eskomis available it doesnt draw power from the battery. But my battery is lalela 80ah 24v.
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That battery is rated at 1C so it will be happy discharging 80ah x 24v = 1920 Watts continuously. Any higher and the battery might switch itself off in order to protect itself.
 
UB40 said:
That battery is rated at 1C so it will be happy discharging 80ah x 24v = 1920 Watts continuously. Any higher and the battery might switch itself off in order to protect itself.
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It would be a wise move not to exceed the rating of the inverter, I have had batteries fail as in physically melting the terminals even with a built in BMS.

So if it happens that power goes out while drawing more than 2000W, the inverter and the battery will have to deal with the extra current draw.
 
TheChamp said:
It would be a wise move not to exceed the rating of the inverter, I have had batteries fail as in physically melting the terminals even with a built in BMS.

So if it happens that power goes out while drawing more than 2000W, the inverter and the battery will have to deal with the extra current draw.
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Agree, I manage my loads during loadshedding and often use less than 200 watts. Inverter stays nice and cool and my lead acid batteries are very happy.
 
you should not connect more than its rating ever anyway, why are you pulling more through it when there is eskom in? just plug that other load in to a wall plug directly
 
Steamy Tom said:
you should not connect more than its rating ever anyway, why are you pulling more through it when there is eskom in? just plug that other load in to a wall plug directly
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I was just thinking in terms of the cleaning lady using the wrong plug to do her stuff. A just in case senario. With my previous mecer inverter she did it accidentally and the unit switched off when she plugged the vacuum into the wrong outlet regardless of eskom power or not.
 
Yea most devices have an overload shutdown

So when eskom falls away while exceeding output they trip overload

Do keep in mind that the relays that do the bypass have their limits too, so try not to overdo it

And also keep the supply cable thickness in mind and especially if powered via a normal plug to not exceed the 16A of the plug
 
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