Hi all, I’m new to the solar side of things and was previously using a Mecer Axpert 3Kva with 2x 200ah Oliter batteries. I had the opportunity to sell my current system and upgrade a bit. I’m on a very tight non-existent budget, but I want to do the right thing and will make a plan.
I’ve upgraded to the equipment listed below and had a solar installer install my PV panels. The 3x panels are connected in series. He did tell me right from the start that I don’t have enough PV panels. He then changed the setup with the settings that he suggested, but I found that the batteries didn’t charge and felt that the batteries were used too much. (Sorry I might still be in the battery as a backup mentality). I also noticed that my batteries % according to Watchpower v1.14 (RS232 - LAN cable) showed that they were on 47% at 51.90V with a 247W load. I’m worried because the % goes below 50%...
My average load during the day is about 250w - 600w max and my intention with the solar side was to hopefully be on solar during the day (saving a bit on Eskom) and then on utility during the evening.
Question 1: What would the suggested settings be with the equipment I have and way of use?
Question 2: Should I purchase 3 more panels and then how would they all be connected? Will it help or do I need even more?
Question 3: Is it ok to use the batteries and does this not significantly reduce the lifetime of the batteries?
Question 4: If a battery discharges a bit and then charges again is it then seen as a charge cycle?
I have raised these questions to the solar installer and he just said that his settings are correct and should stop worrying about what I see on the display panel and software.
Solar installers settings: 01: SBU, 02: 80A, 05: USE, 06: LTD , 07: TTD, 09: 50hz, 10: AUT, 11: 30A, 12: 49.0V, 13: 51.0V, 16: SLB/UCB, 18: BOF, 19: TEP, 20: LON, 22: AOF, 23: BYE, 25: FEN, 26: 57.2V, 27: 54.0V, 28: SIG, 29: 47.0V
Any help or suggestions would be appreciated.
Inverter - As per solar installers suggestion
Kodak King 5Kva Off Grid 48V
Model: OG-Plus 5.48
Rated Power 5000VA/5000W
Efficiency (Peak) 93% Line mode, 90% Battery mode
Solar Charger type MPPT
Maximum PC Array Power 4000W
MPP Range @ Operating Voltage 60 VDC ~ 115 VDC
Max. PV Array Open Circuit Voltage 145 VDC
Max. Solar Charge Current 80A
Max. AC Charge Current 60A
Max. Charge Current 140A
4x Oliter 200ah Gel
Float charge 13.5V - 13.7V
Average charge 14.1V - 14.4V
3x AE Solar panels
Nominal Max. Power Pmax (Wp) 330
Maximum power voltage Vmp (V) 33.81
Maximum power current Imp (A) 9.76
Open-circuit voltage Voc (V) 41.31
Short-circuit current Isc (A) 10.37
Module efficiency (%) 19.90
Power tolerance Pmax (Wp) 0 / + 5
Maximum system voltage DC (V) 1000
Maximum series fuse rating (A) 15