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MultiPlus II 5kva - not inverting


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Hi Guys,

Last night when we load shedding started at my house, my Multiplus II did not "activate" ie, power went off, but it did not kick in. When I went to investigate. It showed that the batteries was low, the red light flashing next to the battery low on inverter, but the batteries, 2 x polyntech's 3500 were at 88% full.

I did charged the batteries during the day, from Eskom, as with all the clouds the last 5 days, here in Centurion it was "empty" (45%). My SOC is usually set at 30%. but with the clouds around it increased it to 45%

I then went to switch off the inverter for a couple off seconds, 10 or so seconds, and then I switched the inverter back on. Then it started to work again, power went back on. I then look at my logs on the GX, under notifications and it said to me battery low & inverter overload. My inverter is just over a year old, so it sill "new".

So I guess when the power went off some surge or something happened, to overload the inverter and it switched itself off to protect itself, that is my thinking in any case. I am correct in my assumption or should I be more worried, this is the first time that it has happened. It happened at around 20:25 last night and at that stage our consumption was very low. The geysers were off, no tumble dryer running or any other high powered items were running that I am aware off.

Regards

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1 hour ago, isimobile said:

So I guess when the power went off some surge or something happened, to overload the inverter and it switched itself off to protect itself, that is my thinking in any case. I am correct in my assumption or should I be more worried, this is the first time that it has happened. It happened at around 20:25 last night and at that stage our consumption was very low. The geysers were off, no tumble dryer running or any other high powered items were running that I am aware off.

You won't be the first one. Same happened to @georgelza a few weeks ago.

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yebo.

it was cold chilly Saturday afternoon, my pool pump was on, 800watt, wife switch both kids oil heaters on, assume 1000watt each, had the microwave on, 1000watt and then the TV, computers etc, total, approx 4000watt. ... oh wait, tumble dryer was also on.

I run a OpenEnergyMonitor installation with induction based current clamps around every one of my circuits so could go look after the even to see exactly what my load was and from where.

Normally not a problem, battery was full so some load came from there as being inverted, some came off the panels as direct invention, totally just under 3000watt and the balance from the Grid,

We have a "sad" unstable grid, had a voltage fluctuation, big enough that the inverter went into protect myself and house mode, isolating the grid for a second or 2... not realising the load was over it's 3000watt capability, so by the time it cut the grid off, it discovered it was in overload land and shut down to protect itself.

When it came back... the microwave was off, dropping the load by odd 1000watt, making it happy land, needless to say the oil heaters were shut down.

G

 

Edited by georgelza
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