GeorgeP

Hi all I'm hoping someone on here can help me. We used to have a Schneider Inverter 24V 1500VA – Homaya Hybrid with 2 Deep Cylce batteries. This lasted us 6 - 8 hours if we kept the load under 300 W during power outages. During the middle of last year we upgraded to the following system (and we've just been experiencing problems ever since): 4x Solar panel 455W The Sun Pays Inverter 5.5kw (5.5kW 100A Axpert Type Pure Sine Wave Inverter High voltage) 4x Battery Royal 1150K (Deep Cycle) Output Source Priority: Solar + Line (PAL) Recently we added an additional 4 batteries (used but still new) to the above system in an attempt to improve the endurance of the system, but to no avail. With our load being under 300 W during power outages and load shedding, the system almost doesn't make it to 4 hours at night and starts giving the Low Voltage Warning. And sometimes it almost doesn't even make 2 hours (like this morning). Our electrician who did the installation has tested the batteries and said that they're all 100% fine. But something is still not right. I've logged some information on various dates to compare. On the new system, with 4 batteries, I tracked the following: Date / Time Battery Voltage Load On Inverter In Watts Battery Level Indication Notes 28 Feb 2023 19:00 50.8 284 19:30 50.3 231 20:00 50.1 233 20:30 49.8 231 21:00 49.4 266 21:05 49.2 263 Electricity back 2 Mar 2023 19:00 49.4 172 3 19:30 47.1 162 3 20:00 44.5 175 1 20:30 44.3 174 1 21:00 44.1 139 1 21:05 44.6 140 Electricity back 8 Mar 2023 AM 09:00 54.8 204 3 09:05 52.2 205 4 Electricity off 09:30 50.2 202 4 10:00 47.5 201 3 10:30 45 210 2 11:00 44.7 202 1 11.:05 44.7 201 Electricity back PM 19:00 51.1 405 4 20:00 45.6 320 2 21:00 43.2 386 1 21:05 45.2 277 Electricity back With the 8 batteries, I tracked this: Date / Time Battery Voltage Load On Inverter In Watts Battery Level Indication Notes 18 Mar 2023 21:00 52.5 587 4 21:30 50.5 298 4 22:00 50 300 3 22:30 47 281 3 23:00 45.2 270 2 23:05 45.9 279 Electricity Back 29 Mar 2023 17:00 52.1 496 4 18:00 50.5 183 4 19:00 48.7 242 3 19:30 45.4 241 2 20:00 45.1 245 2 4 Apr 2023 19:00 52.1 397 4 19:30 50.5 300 4 20:00 50.3 247 4 20:30 46.3 248 2 21:00 46.1 252 2 7 Apr 2023 21:00 51.4 411 4 21:10 50.3 402 4 21:30 50.2 406 4 21:45 50.3 218 4 22:00 49.7 209 3 22:15 46.7 208 2 22:30 45.7 149 2 22:45 45.6 144 2 23:00 45.5 142 2 11 Apr 2023 18:30 50.3 261 4 19:00 50.5 228 4 19:30 50.3 212 4 20:00 46.6 208 2 20:30 45.1 250 2 21:00 45 248 2 21:10 44.9 252 1 21:30 44.8 202 1 22:00 44.5 202 1 22:45 44 196 1 23:00 43.8 194 1 23:10 Electricity back 23:15 43.8 287 1 Electricity off 18 Apr 2023 18:00 50.55 142 4 19:00 47.5 212 3 19:01 46 219 2 19:05 46.7 212 Charging 22 Apr 2023 21:00 51.6 180 4 Electricity goes out 21:15 50.9 180 4 21:30 50.9 184 4 21:45 50.7 197 4 22:00 50.7 194 4 22:15 50.6 191 4 22:30 50.4 233 4 22:45 49.8 232 3 23:00 45.8 235 2 23:10 46.3 236 2 Electricity back 23 Apr 2023 05:00 51.4 410 4 05:30 49.8 520 3 06:00 45.6 294 2 06:15 44.6 320 1 06:30 43.5 191 1 06:45 43.2 189 1 06:50 42.8 333 0 Warning beeping started 06:55 43.5 103 1 Solar started but showed 0 W - still beeping 07:00 43.5 107 1 Solar watts = 6 W 07:15 43.4 107 1 07:30 43.5 107 2 Beeping off 07:45 45 102 Charging The electrician made some changes to the settings and it seems like it is performing even worse now. Unfortunately I'm not sure of exactly all the parameters he changed and what to. Feels like he's grasping at straws at this point to try make the system work. We cannot afford Lithium batteries at this time, and considering our old system pulled through easily on the Deep Cycle batteries it's hard to understand why the current ones aren't holding out the way they should. Attached are some graphs for a visual comparison of the above charts. We are at a loss. Has anyone experienced anything similar? Can someone suggest any useful advice? NOTE: During the day time the Solars pull the load and we don't have much trouble then, the above-mentioned issue occurs when there is no Solar input/Battery only.