Brothers,
Can anyone please guide me about the number of distribution boxes and specs of spd/fuses/mcb/battery breaker on both ac and dc side, solar installers have provided different me different costing with no detailed explanation on the description. my pv system will have 20 panels of 585 watt, there will be 4 strings of 5 panels in series each on 2 x 6kw solax hybrid inverters running in parallel (2 strings per inverter), the system will utilize grid connection but no net metering and will have 1 lihtium battery of 5.3kwh 100ah. specifications of panels, inverter and battery are shared below. I will also need to do ac and dc earthing. i could get some details from one of the installer as follows,
2 x db box 18 way
2 x db box 10 way
4 x 2p dc breaker 500v
4 x 2p dc spd 500v
6 x 2p ac mcb 32amp
2 x 4p ac spd 40ka
8 x dc fuse + base
4 x ac fuse + base
2 x battery breaker 125 amp
Panel specs-
module type: bifacial
maximum power pmax: stc 585wp, noct 441wp
maximum power voltage: stc 44.02v, noct 41.05v
maximum power current: stc 13.20a, noct 10.74a
open circuit voltage: stc 52.70v, noct 40.05v
short circuit current: stc 14.01a, noct 11.31a
module efficiency stc: 22.65%
operating temperature: -40c -+85c
maximum system voltage: 1500vdc
maximum series fuse rating: 30a
power tolerance: 0 -+ 3%
temperature coefficients of pmax: -0.29%/c
temperature coefficients of voc: -0.25%/c
temperature coefficients of isc: 0.045%/c
nominal operating cell temperature: 45+-2c
refer. bifacial factor: 80 +- 5%
Hybrid Inverter specs-
dc input
max pv array power wp: 12000
max pv input power pv1+pv2 wp: 9000
max pv input voltage v: 550
start output voltage v: 110
nominal input voltage v: 360
mppt voltage range v: 80-520
no. of independent mppt / strings per mppt: 2 / pv1:1; pv2:1
max input current a: 16/16
max short circuit current a: 20/20
ac input & output
nominal ac output power w: 6000
max ac output apparent power va: 6000
max ac output current a: 27.3
max ac input apparent power va: 9200
max ac input current a: 40
nominal voltage v, frequency hz: 220 / 230 / 240, 50 / 60
displacement power factor: 0.8 leading 0.8 lagging
thdi (rated power) %: < 3
Battery data
Battery type: lithium / lead acid
max charging / discharging current a: 120
battery voltage range v: 40 - 60
nominal battery voltage v: 48
eps output with battery
nominal output apparent power va: 6000
peak apparent power va, s: 12000, 10
nominal output current a: 26.1
nominal voltage v, frequency hz: 230, 50 / 60
switch time ms: < 10
efficiency
mppt efficiency %: > 99.9
max efficiency %: 97.6
euro efficiency %: 97
Power consumption
self consumption w: standby < 40, shutdown < 10
environment limit
degree of protection: ip65
operating temperature range c: -25 to +60 derating above +45
cooling concept: smart cooling
topology: transformerless for pv side, hf for battery
Battery specs-
battery type: lithium ion phosphate
nominal capacity kwh: 5.3
useable capacity 90% dod kwh: 4.7
max output current a: 100
peak discharge current a , s: 200 , 10
nominal voltage v: 51.2
operating voltage range v: 45 - 58
operating temperature c: 0-53 charge, -20 to 53 discharge
ingress protection: ip65
