PV string · inverter · battery

Solar Design Calculator

Check panel strings, inverter limits, cable voltage drop and battery capacity from one design workspace.

Check Battery compatibility

Total panels 16 7.28 kW nominal PV

Usable battery 18.42 kWh 3.20 h at 5.75 kW

Estimated daily PV 28.8 kWh +18.8 kWh after daily load

Overall assessment Check 0 checks need attention

Design conditions

These assumptions drive every string and battery calculation.

Project name Minimum ambient °C Maximum ambient °C Maximum voltage drop % Design / irradiance allowance % Peak sun hours h Estimated daily load kWh Backup load W

Inverter

Select the inverter whose limits will be used for the assessment.

Inverter model

Rated output: 12.00 kW
Maximum PV power: 15.60 kW
Maximum PV voltage: 800 V
MPPT range: 200–650 V
Startup voltage: 160 V
MPPT trackers: 2
String inputs: 2 + 1
Operating current: 26 A + 13 A
Maximum Isc: 34 A + 17 A

PV strings

Add up to ten string groups and assign every group to a physical inverter MPPT.

String	MPPT	Panel model	Series	Parallel	Cable	Length	Actions
						m
						m

PV calculation results

Status	String	MPPT	Panels	Cold Voc	Hot Vmp	Cold Vmp	Max Isc	Operating current	Nominal	Voltage drop
Pass	String 1	MPPT 1	8	414.6 V	276.9 V	307.2 V	12.01 A	11.35 A	3.64 kW	4.32 V · 1.56%
Pass	String 2	MPPT 2	8	414.6 V	276.9 V	307.2 V	12.01 A	11.35 A	3.64 kW	4.32 V · 1.56%

String 1 checks Pass

Cable voltage drop: 1,56 % is within the 5 % limit.
Inverter maximum voltage: 518,29 V is within the 800 V limit.
MPPT 1 operating current: 11,35 A is within the 26 A limit.
MPPT 1 minimum: 276,88 V meets the 200 V minimum.
MPPT 1 maximum: 307,21 V is within the 650 V limit.

String 2 checks Pass

Cable voltage drop: 1,56 % is within the 5 % limit.
Inverter maximum voltage: 518,29 V is within the 800 V limit.
MPPT 2 operating current: 11,35 A is within the 13 A limit.
MPPT 2 minimum: 276,88 V meets the 200 V minimum.
MPPT 2 maximum: 307,21 V is within the 650 V limit.

Battery bank

Select a reviewed SQL battery configuration approved or conditionally screened for this inverter.

Compare all batteries

Required usable energy kWh Design battery power kW Design charge current A Design discharge current A Reviewed battery configuration Complete systems Battery cable Cable length m Parallel cable runs

Selected battery configuration

Voltage class: LV
Voltage range: 44.8–57.6 V
Usable per system: 9.21 kWh
Power per system: 10.24 kW
Recommended quantity: 2
Maximum quantity: 32
BMS: CAN
Catalogue status: Conditional

Battery calculation results

Status	Configuration	Quantity	Usable energy	Continuous power	Current / run	Voltage drop	Max charge	Max discharge	BMS
Check	Sunsynk W10.2 Single W10.2 pack	2	18.42 kWh	20.48 kW	120.0 A	0.30 V · 0.66%	400 A	400 A	CAN

Battery bank checks Check

Inverter / battery compatibility: Use at least 2 complete system(s). Electrical screening passes; confirm the exact BMS profile and firmware with the manufacturer.
Recommended battery quantity: 2 selected; the recommended minimum is 2.
Maximum battery quantity: 2 is within the recorded maximum of 32.
Usable battery energy: 18,42 kWh meets the 10 kWh minimum.
Continuous battery power: 20,48 kW meets the 12 kW minimum.
Battery charge-current capacity: 400 A meets the 240 A minimum.
Battery discharge-current capacity: 400 A meets the 240 A minimum.
Battery cable voltage drop: 0,66 % is within the 5 % limit.
Battery cable current capacity: 120 A is within the 192 A limit.

Design assessment

Clear results show which values pass and which require a design change or data check.

Maximum PV voltage

518,29 V is within the 800 V limit. Includes the 25% design allowance.

Startup voltage

276,88 V meets the 160 V minimum.

MPPT lower limit

276,88 V meets the 200 V minimum.

MPPT upper limit

307,21 V is within the 650 V limit.

MPPT 1 string inputs

1 of 2 available string input(s) are used.

MPPT 1 operating current

11,35 A is within the 26 A limit.

MPPT 1 short-circuit current

15,01 A is within the 34 A limit. Includes the 25% design allowance.

MPPT 2 string inputs

1 of 1 available string input(s) are used.

MPPT 2 operating current

11,35 A is within the 13 A limit.

MPPT 2 short-circuit current

15,01 A is within the 17 A limit. Includes the 25% design allowance.

Maximum PV array power

8271,9 W is within the 15600 W limit. Includes the 25% design allowance.

Source-data checks

Items to confirm before production use

46 active, calculation-ready panel models are loaded from SQL.
12 reviewed inverters are loaded from SQL with each MPPT assessed separately.
The battery-bank section uses the reviewed SQL battery configurations and inverter compatibility records.