Hi this 5 year old inverter keeps 'tripping' our solar power system...light says under current also says over current at other times...the batteries are fully charged...there is no extra load...it has been working fine but has suddenlt started to fail...any ideas?
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I like to ask, is the voltage from the solar panel messure with some load connected or is open circuit, normally solar panels produce high voltage than the working system, the reasson for that is to have Amperes in of to charge the batery, these is related to the size and power generated by the panel.
No need a resistor or in any case use a voltage regulator to prevent over charge.
Solar panels produce DC voltage.
some solar panels have the inverter integrated into each solar panel.
I would suggest contacting a local solar panel supplier and asking them if they could add a Battery Charging System to the Solar panels you use. An then what sort of inverter to add to the bank of batteries.
An inverter converts DC voltage to AC voltage to use in the grid.
The AC voltages and DC voltages involved have the possiblity to kill if you much around with electricity.
It depends on many factors. What is your geographical location, in very hot climate generally poly panels do a little better and you need to match your charge controllers input with the solar panels. sometimes for small systems big panels with higher current ratings do not do well.
The inverter will only make AC at a rate per the current and voltage being supplied by the solar panels. The panel outputs need to be checked and compared to the panels that are working correctly.
It certainly sounds as if there is a power distribution problem from the panels supplying the 3100 W average output inverter. It can be anything from a corroded terminal to a damaged umbilical or anything in between.
A bad ground for the inverter will also limit output. It may read resistance / continuity but can not carry the amount of current needed to produce 3100 W output. Given it has only been 5 days the problem should not be hard to isolate and find.
I had a similar problem arise quite recently with an 18 panel system and the problem ended up being corrosion on a terminal block connection. Cleaned up the terminals and reconnected everything with a 2155W difference from the original output on a 3200W inverter system.
the solar panel is just to charge your inverter,if it is charging and
the inverter is on it will drain the current the solar panel is
supplying to the batteries,this makes it look like it is not charging
,so i advice you to switch off you inverter when charging it,get
another set of batteries connected to your solar panel then charge
both, let them be separated so that the new one is not in use so that
when solar is out you can switch to the other set of batteries
are your inverters rated at 60 cycle full sinusoidal wave form or 60 cycle square wave. while both will be tolerated in a transformer, the square wave tends to heat up because it isn't a sine wave. the peaks of a standard sine wave are cut off if observed on an oscilloscope.