Location: Western WA State / US
48v 10.4 kw battery:
Purpose: Emergency backup
Expect to move in next few years and plan to bring components with me toward full off-grid location. Want to expand the system accordingly thru linking inverters to increase power.
a) Backup / emergency power
b) Critical loads: esp in winter: 2 sump pumps. Heat: furnace carriage fan (gas furn)
c) Lights/Fridge/Freezer
Assuming dedicated/separate AC circuits attached to support critical loads.
1st Phase:
Thanks much!
48v 10.4 kw battery:
Purpose: Emergency backup
Expect to move in next few years and plan to bring components with me toward full off-grid location. Want to expand the system accordingly thru linking inverters to increase power.
a) Backup / emergency power
b) Critical loads: esp in winter: 2 sump pumps. Heat: furnace carriage fan (gas furn)
c) Lights/Fridge/Freezer
Assuming dedicated/separate AC circuits attached to support critical loads.
1st Phase:
- (4) 435w 49.7 Voc / 40.5 Max Output volts) each. Bifacial, Half-cut Solar Panels. 3h direct sun; neighbors trees shade differently depending on season. Expect to produce bulk of power during that period. If 4 panels don't cut it, then will add 2 more.
- (2) x (2) Panel in-series. ~100v 10.5amps per series/circuit. Grounded panels.
- Each panel as NEC compliant 2020 Rapid Shutdown
- Combiner Box (3 in, 3 out for expansion)
- Each Circuit will have it's own DC breaker (Sizing: 120v 25-30a)
- Doubles as PV isolation - shut off each series to isolate
- Questions: Looking for a combiner box with 1 'shutdown' switch for immediate manual control, + Lightning Voltage Spike protection. Good quality, midrange price. What are you using? UL certified?
- My muni uses NEC2020. Q: Does this require UL cert on components?
- Each circuit goes to 100v/35a MPPT (atm Victron is assumed but pricey)
- Shutoff between MPPT and Battery.
- Q: Do I need a fuse here? 60v?
- Shut off switch capacity? 60v?
- Inverter charger. Your thoughts welcomed:
- Victron Multiplus II: 48v/3000/35a charger; supports combining GEN (syncs) to Honda EU2000 in emergent situation.
- Cost
- Somewhat concerned about motor startup for sumps (1/2hp) despite surge capacity
- Other Suggestions?
- Victron Multiplus II: 48v/3000/35a charger; supports combining GEN (syncs) to Honda EU2000 in emergent situation.
- Lightning rod / sep grounding rods away from GRID grounding rod.
Thanks much!