geprieto

Hi all. I have a Voltronics Axpert MAX, installed here in Chile (220V grid power). I cannot force the unit to output at 220V, either from the panel itself, Watchpower or Solar-Assistant. It accepts the change from 230 (default) to 220, but it never actually changes, even if the setting is accepted and displays 220V for a time. After a while the setting goes back to the default 230V, and it NEVER does the actual voltage switch. Any ideas? @Coulomb?

AS I understand since this is now a paid app (OS?), they are no longer permitted of posting here (which, although a bit annoying, makes sense, to keep the forum impartial, etc). Regarding the battery %, If you don't have the special cable to talk directly to the battery BMS, it's reported by the inverter, and as such, not very precise. With the cable, as soon as I get the parts to build mine I'll update. It's a great product, with a developer very eager to improve it further.

The issue here is that they are playing with firmware updates that are not approved by the vendor, so I'm a bit hesitant on trying them. So far on the 45 fw I'm not seeing this issue, but I have to say I'm VERY worried if this gets sorted out in a firmware update. It means Voltronics is using electronics from a grid tie inverter for this unit. Any leaks should be protected via hardware, not software... As soon as I have a hardware solution I'll post it here.

There are MANY posts around here regarding this issue. It's dangerous stuff. What would be the proper way to correct this without trusting the firmware? Anything that can be installed between the meter & inverter?

Now that I'm reading it with Solar Assistant I get more reasonable readings. The Efergy sensors seem like the culprit here, and they were not exactly designed for this anyway. Thanks for all the clarifications!!!!

Here's an example. I'm more and more thinking that a clamp current sensor is not good in this case. Looks like the Inverter phase is not near enough 1 so it's as you say, kW doesn't translate well. Because it doesn't make absolutely no sense... (Device is just another clamp for a heat pump water heater I installed and wanted to check performance. Totally recommended!).

Thanks a lot! Guess for now I'll set the back to grid to 47 or 48, even if that doesn't translate well to %, and start working on a ICC update with a PI. Funny how this world is. I'm thinking on the wasted energy and equipment going to hell due to companies doing installations and users not getting involved in the tuning of the system. I thought this was going to be a a set it and forget it thing. Well, at least there's nice support thanks to you guys! Plus it's entertaining...

Hi and thanks for letting me join in. I just finished last week installing th following system: - 16 x 310Wp solar panels, in 2 channels of 8 ea. - 7.2 kW Axpert MAX inverter (hybrid) - 2 x 3.2 kWh Pylontech US3000 This on top of a one-phase 220V/50Hz grid (utility) installation (Chile). I have a lot of issues! 1. In SUB priority the inverter never quite shuts down the grid. Even when there is enough solar power, it draws about 0.5kW from grid (utility). If I switch to SBU priority it then draws properly. This even if for both modes I just disconnect the battery to take it out of the equation. 2. I'm disappointed of the idle draw power of the inverter. I test the power with 2 efergy sensors, one before the grid (utility) input at the inverter, and another at the output. There are situations where if I'm drawing 2kW at the house, the inverter is consuming 3 - 3.5! It doesn't make any sense. 3. If I install the Pylontech batteries using the default settings on the Inverter (of course, setting the battery mode to PYLON), it drains them too low. The default is set at 46V to go back to utility, and this means that at night the BMS has to use grid to charge the batteries a bit, I get grid spikes of 3-4kW for about 10 minutes (maybe the batteries asks for an emergency charge?). Anyone with similar issues? The information on how the inverter works is not very big...