Entry alternative · 48 V · one Growatt SPF 6000 ES Plus
Project Anor on one Growatt
The smallest of the alternatives. One Growatt SPF 6000 ES Plus runs the house from 8 Jinko 650 W panels (5.2 kWp) on its two built-in solar trackers and one Deriy 14.7 kWh pack. Grid is a backup charger and bypass. Light loads and one air conditioner share its 6 kW output.
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Solar
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Battery
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One inverter
48 V
System voltage, 16S
Wiring schematic
Select any block for its specs and wiring. The PV box opens to show the wiring inside. Hover a block to trace its connections.
The layout at a glance
Heavy loads
Upgrade path
Sizing checks
Do the strings and breakers suit the equipment they feed? Each check is worked out live from the datasheet numbers in the parts list, so it updates whenever the data does.
Panels make more voltage in the cold, so voltage limits are checked at the coldest cell temperature you expect.
Battery side
How these are worked out
- Cold voltage:
Voc × panels in series × (1 + |temp. coeff.| × (25 °C − coldest °C)), compared with the charger’s absolute maximum PV voltage. The temperature coefficient comes from each panel’s datasheet. - Short-circuit current:
Isc × strings in parallel, compared with the charger’s maximum PV short-circuit current. - Working current and panel power: compared with what the charger or tracker accepts. Going over isn’t unsafe; the charger trims the excess, which is called clipping.
- String fuses and breakers: IEC 62548 puts their rating between
1.5 × Iscand2.4 × Iscof one panel, and no higher than the panel’s maximum series fuse rating. - Surge protectors: their rated DC voltage should stay above the string’s cold open-circuit voltage.
- Battery side: the battery breaker at 1.25 × the inverter’s maximum battery current; inverter draw at a near-empty 48 V and about 94% efficiency; current shared evenly across the packs; panel power against each inverter’s maximum PV input.
A sanity check for readers, not a substitute for a qualified installer or Growatt’s own sizing tools.