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At the end of the month I would have one years surplus power bought, going to keep that and only buy what I need per month to keep my one year buffer. One has to save where you can. Brought my electricity bill down from R1700/month in 2016 to R300/month end 2019.

I'm already running just about 90% of the house from the solar. The 10% that is left not operating during day time (scullery).

Thanks for the feedback Coulomb. Seems like the case unfortunately. Guess it could be fixed by the suppliers though... if they want to, just place a damper/ longer time to respond to low load changes etc...

Hi Arandoza, thanks for the reply. No, power saving is not enabled. When the load is higher again it returns to normal behavior. Assumptions about the colors are correct. Battery voltage does not drop, and there is no difference in Amps to battery. Guess it has something to do with the MPPT not able to handle the low load and availability of all the PV.

Good day all, please assist or advise. I have a Axpert 5KW mark II with a 3.2KW solar array. When the load is low (100 - 200W), the PV Watts jumps between 70 - 600W. Battery is fully charged of course. Is there something or some setting that I am missing to damp the response of the inverter?

Hallo BMK and all the veterans. Please correct me if I am wrong, but I think this is what caused my set of lead acids to go to battery heaven way to early. The back to discharge voltage is set to 54V. Thus the batteries would never be fully charged. As soon as you're batteries reach 54V, your system would return to battery power. Should this setting not be set to FULL (The inverter detects when no more current is drawn and stop charging the batteries)? It makes sense to me that the system return and still draws 2A's as the batteries are not fully charged. Please give your feedback regarding this matter.

Good day all Please help me out here. Thought I did everything right... Have 2 x 5KVA Axpert II's connected in parallel with all required cables etc. All seemed fine when only one Inverter were on (Master) , slave still switched of but Inverter screen etc on. When I switched the second inverter on, seemed that there was a Neutral fault as my pc screen kept switching on and off. Stared fault finding by eliminating sources, PV, battery and mains, all on and off and in different sequences etc, no success. Eventually the loud expensive bang noise from the Master Inverter and a piece of semiconductor exiting the inverter... Please find attached my connection drawings and let me know am I missing something obvious. And a question: Should the AC Input and Output Neutrals be common-ed to solve my problem. As mentioned, all started when 2nd inverter output were activated. AC on site.pdf AC Main DB.pdf

Thanks for the feedback gentlemen, much appreciated.

Good day I know that the hours daylight has an effect on the total power generated. The angle of the sun of course also has an effect on the peak power that can be generated. My solar panels are at a fixed angle of about 25°. According to my results and calculations the peak power in winter is about 33% less than in summer. Please comment on the above, if most of you also have the same result or not.

Hi I had the same requirements and did the following 2 years ago. Installed a Solar geyser with Eskom as back up if more warm water is needed. (R13k) Installed a solar system consisting out of 3 x 300W Renesola Panels, 1 x 5KVa Axpert inverter and then 4 x 200A Vision batteries. Replaced all lights in the house with LED or power saver bulbs. (R40K). Except for the solar panel installation I did all the rest myself (Panels on a 2nd story roof with not a lot of movement space). All the lights and power to three rooms is handled by the system. The rest of my house is still on normal Eskom. Results: I brought down my consumption from 25 to 15kWh per day. I have a saving of R500/ month on my electricity bill. Biggest saving is done on the geyser. Over the last two years, my geyser has only been on for 25% of the time when warm water was required, rest of the time the sun did all the work. (Require warm water for 3 hours per day) Hope that the information is helpful. As @The Terrible Triplett said you are on the right place for advice, guys here always willing to help. Regards

@PaulF007 Hi Paul - Software setup mistake - My back to discharge voltage setting was wrong. I did the inverter setup with the Watch Power software and for some silly reason the Back to discharge voltage was set on 54V and not Full. Thus while battery was charging and it reached 54V it went back to battery power rather than staying on grid and fully charging the batteries. It meant that the batteries were never fully charged. Bulk charging were set on 56,4V and Float charging on 54V that was correct for the batteries. Need for the system is to go off grid with part of my house electricity. Currently the system can handle all the lights for the house (90% Led, 10% Power saving bulbs) and supply electricity to 3 rooms in the house, (lounge and 2 bedrooms). Normal consumption is 400 - 700W in the evenings, float during the day 100 - 120W. Regards

Hi TT. At this stage I am happy with the 900W array. Batteries were back on 100% charged by about midday. Except for weekends and holidays there is just about no load during the day (80-100W).

Good day all. My solar system is 2 years old and I paid a high price for a software setup mistake. My batteries are shot and need to be replaced. System consist of the following: 1 x 5KVA Axpert Inverter, 3 x 300W Renesola solar panels and has 4 x 200AHr Vision Batteries (6FM200P-X)... 48V system. 1 x Battery Balancer Power consumption is low when on full load, about 700W - 1KW. Load consist of lights and power points for 3 rooms. 1. Which is the best batteries to replace the current ones with? Should I go 200AHr again or maybe something smaller 2. Is the Axpert a "Battery killer" as I heard from a salesman of another brand of inverters? Please assist.

Hi Chris-R Suppose that I would only need one with my 4 x 200AHR batteries in series? Would you please reserve 1 x HA-02 for me.

Morning all Need some help from the Masters please. I am experiencing a lot of trouble with my batteries. I have a set of 4 x 200AHr Vision 6FM200P and an Axpert 5Kva Inverter, 3 x 305 Renesola Panels. The batteries were installed in April 2016. Everything worked 100% until mid summer November/ December 2016. The angle on the solar panels were not correct so the batteries did not charge fully during the day. The Inverter were suppose to charge the batteries. Late in December I realized that the cycles after batteries were charged by inverter until next charge where only about an hour. Use to get through the night on a single charge in the past. Inverter were set up as follows: Charging: Solar First, Source: SBU (Solar, Battery, Utility), Battery Type: User or Other Bulk charging Voltage: 56.4, Float Charging: 54, Back to Utility/ Solar: 47V, I have since set it up to 48V. Problem description: Batteries does not have any capacity. Charges and Discharges quickly. Corrective actions taken/ tried: I reconditioned all batteries with an C-Tek charger, Left the batteries disconnected and voltages fell to 12.8V on all individually. Left batteries on Utility charge as well, same result, reaches max voltage drawing less current and go back to floating voltage. Still no capacity. QUESTION: Is there any way to recondition or save my batteries. Attached is the battery spec sheet. Please assist as those batteries are way to heavy and expensive to use as door stops. 6fm200p-x.pdf

@Chris Hobson It is a DIY installation Chris. @ Chris-R Doesn't seem as hot as it use to... @Don Thought I could get away without buying a BMV, but seems I do need one.

They only peaked at 1100W after cloud cover and after panels cooled down.