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Fan noise can be a problem, depending upon where your inverter is placed. In my case, it is in a utility space which happens to be near my wife's study. We recently took over a friend's 5kw Mecer inverter to replace our older 3kw Mecer inverter. My wife has hearing similar to a dog (please don't let her read this!) and she was bothered by a high pitched whine from the inverter fans. I experimented with lower charge rates which helped to some degree, but the whine was still there. This morning I took out the inverter and removed the 2 fans. I cleaned them, and then removed the sticker in the middle of each fan. I put 3 or 4 drops of sewing machine oil in each bearing, and then spun each fan using a hair dryer to let the oil work itself in. I stuck back the stickers, refitted the fans and put the inverter back. It really has made a big difference, and there is once more peace in the home (In more than 1 way!) Im going to order new 80mm x 80mm ball bearing fans with a 4 pins lead to replace these, but this was worth posting in case it helps others.

I am monitoring my setup with Solar Assistant. Every now and again, the inverters behaviour is inconsistent with the selected mode - It is set to SBU. Charge priority is set to Solar first. This afternoon, we have full sun - If i place a larger load on the inverter, it is not drawing the load from the panels - it draws from the battery. Not sure if this is an SA issue or an inverter issue, and how to correct it. Any ideas? EDIT: turning off battery, panels, mains to inverter and inverter, and then restarting seems to correct this. But it now seems to happen once every 2 weeks or so.

Weird. Not sure how it would have been updated.... I have connected it to Power watch twice to configure it. To my knowledge it was a used unit prior to me getting my hands on it in February this year...??

@Coulomb, it's 02.68. I read on another forum the Mecer show zero load if the load is below 100w. This was in the early hours of the morning, so it could be the load dropping to the base load of a few lights and electronics in a resting state. The lights were still on, though, so the inverter was producing power.

@Coulomb, it's 02.68. I read on another forum the Mecer show zero load if the load is below 100w. This was in the early hours of the morning, so it could be the load dropping to the base load of a few lights and electronics in a resting state. The lights were still on, though, so the inverter was producing power.

My setup is as follows: Mecer SOL-I-AX-3Mplus48 Sunsynk 5.32 Battery 4 x 555w panels in 2 strings of 2 Solar Assistant Having installed Solar Assistant, I'm following the load and battery state to get a feel for how I want to set the inverter modes. I notice that the load measurement seems to drop to 0 every 15 mins or so for about 15 mins, then jumps up again. The load is not actually changing, but it appears that the inverter is measuring g it as such. Will a firmware upgrade sort this out?

Thanks. I assumed so but worth asking.

Hi. I have a Mecer 3KVa 48V inverter. It currently has 3 operating modes: UTI, SOL and SBU. I see other Axpert inverters have a SUB mode, which I would like. Can a firmware upgrade make this possible?