Consumption
Establish average monthly and daily energy.
ON-GRID WORKSPACE
Basic PV Design
Build a transparent preliminary array design from the customer's monthly energy consumption.
Engineering boundary
This workflow proposes array values only. It does not determine inverter compatibility, maximum series modules, or maximum parallel strings.
Project Information
Project metadata only. These fields do not affect engineering calculations.
PV Requirement
Apply PSH and the study design factor.
Choose Panel
Enter manufacturer datasheet values manually.
Panel Quantity
Round required physical modules upward.
Proposed Array
Check module count and basic electrical values.
STEP 1 OF 5
Monthly Consumption
How much energy does the customer use each month?
Use actual kWh when available
Actual kWh from the customer electricity bill is preferable to estimating energy from pesos.
Monthly kWh
Enter one to five months. Blank months are ignored.
ASSUMPTION · USER EDITABLE
Average monthly consumption—kWh/month
Daily energy consumption—kWh/day
Daily energy—Wh/day
Show calculation
Why?
PV sizing begins with energy use. Converting the monthly bill period to a daily requirement gives a practical basis for production sizing.
Source & classification
STEP 2 OF 5
PV Requirement
What PV array capacity is required?
Daily energy kWh/day—Automatically taken from Step 1.CALCULATED
Required PV array—kWpCALCULATED
Show calculation
Why?
Peak Sun Hours converts daily energy demand into nominal PV capacity. The design factor adds the allowance defined by Study Methodology v1.0.
Source & classification
— kWh/dayCALCULATED · Step 1
4 h/dayASSUMPTION · User editable
1.30METHODOLOGY · Study Methodology v1.0
STEP 3 OF 5
PV Module
What solar panel will be used?
Enter only known values
Copy specifications from the manufacturer datasheet. Missing optional specifications may be marked “Not provided.”
Identification
Power / Electrical
Temperature Data Optional
Module Limits Optional at this stage
Other Information
Classification: USER ENTERED
Confirm the checkbox above to classify the source as Manufacturer Datasheet.
STEPS 4–5 OF 5
Panel Quantity & Proposed Array
How many panels are required, and how are they provisionally arranged?
Panel data required
Enter Pmax, Voc, Vmp, Isc, and Imp in the PV Module step to complete this design.
Required PV—kWp
Selected minimum quantity—modules · rounded up
Actual installed PV—kWp
Difference—kWp
Show panel quantity calculation
Basic PV Array Information
Module values at the proposed array's basis.
Proposed Array Configuration
Enter a tentative series/parallel arrangement. This checks quantity only—not inverter compatibility.
×=
—configured modules
Enter a proposed configuration
Basic Array Electrical Values
String Voc—V
String Vmp—V
Array Isc—A
Array Imp—A
Show calculation & explanation
Series: Voltage increases. Current stays the same.
Parallel: Current increases. Voltage remains the same.
Pending inverter matching
No inverter is selected. These electrical values are not marked pass or fail against equipment limits.
STEP 6
Inverter
Which proposed On-Grid inverter will be used?
Required PV—kWp
Actual PV Array—kWp
Modules—Panel not selected
Configuration—Proposed in Step 5
Select the intended inverter
Enter its manufacturer specifications below. Compatibility with the — kWp PV array will be checked in the next Matching step.
Identification
AC Specifications
Current required: Enter the rated current corresponding to the selected 220 V or 230 V project voltage, or enter the maximum AC output current. Each current is stored as its own numeric value.
PV / DC Input Specifications
Purpose: This is the manufacturer value used as the maximum permitted installed PV array power.
Per-MPPT Limits
Enter one shared set or tracker-specific manufacturer limits.
Enter the number of MPPTs to add tracker-specific limits.
Advanced / Optional Inverter Information
These fields support future equipment-library, report, and warranty features. They do not affect Step 6 completion.
Classification: USER ENTERED
Confirm the checkbox above to classify the source as Manufacturer Datasheet.
DATA REQUIRED
Inverter data is incomplete
Provide only the specifications needed for upcoming engineering checks.
No matching performed
Series limits, voltage/current compatibility, PV-power compatibility, DC/AC ratio status, and MPPT allocation remain in Step 7.
STEP 7
Inverter ↔ PV Array Matching
Is the proposed PV array electrically compatible with the selected inverter?
OVERALL RESULT
INCOMPLETE — ADD REQUIRED DATA
Complete the design data required for every critical check.
PV Array
Inverter
Site Matching Input
Do not use an invented temperature. Enter the project's design minimum ambient temperature.
MPPT Allocation
Assign each proposed parallel string to the tracker that will receive it.
A valid proposed array and inverter MPPT count are required.
Series Design Guidance
Operating-voltage guidance and the maximum-DC-voltage safety limit are shown separately. The calculator does not modify the proposed configuration.
Engineering scope
These are Study Methodology v1.0 equipment-matching checks. This page does not claim PEC or NEC compliance.
STEP 8
Preliminary Protection
What preliminary DC and AC protective-device sizes are required?
PV Configuration—
Module Isc—A
Maximum AC Output Current—A
Rated AC Voltage—V
Preliminary protection sizing only
Final protection selection must be verified against equipment manufacturer requirements and applicable electrical codes.
STEP 9
Preliminary Wire Sizing
Size the two primary On-Grid circuits by ampacity and voltage drop.
Project Cable Inputs
Lengths are one-way. Current and circuit voltage come automatically from the approved design.
Preliminary wire sizing — Study Methodology v1.0
Final conductor selection must be verified against manufacturer requirements, conductor insulation rating, installation method, ambient temperature, conductor bundling, termination ratings, applicable correction/adjustment factors, and applicable electrical codes.
STEP 10
Preliminary Bill of Materials
Combine design-determined equipment with editable site and installation materials.
Preliminary bill of materials
Mounting and installation-material quantities must be verified against actual site conditions and final installation layout. Automatic roof/layout material takeoff is planned for a future version.
DESIGN-DETERMINEDINSTALLATION / USER-DEFINED
| Item | Description / Specification | Quantity | Unit | Source | Notes |
|---|
No automatic site quantities
Blank user quantities remain “TO BE DETERMINED FROM SITE / LAYOUT.” Pricing and costing are not included.
STEP 11
Final Design Report
Review the consolidated On-Grid design and print or save it as a PDF.
HYBRID WORKSPACE
Hybrid Design
The complete preliminary Hybrid V1 workflow is active through Step 15.
Preliminary engineering study
Protection, conductor sizing, equipment compatibility, installation, and code compliance require final manufacturer and engineering verification.
Shared Project Information
These fields are shared with On-Grid and do not affect calculations.
PV Engineering
Existing engines will be reused after Hybrid methodology approval.
Backup Loads
New methodology required.
Battery System
New sizing and matching modules required.
Protection & Wire
Existing engines can accept future Hybrid circuits.
BOM & Report
System-specific profiles are registered as placeholders.
HYBRID STEP 2
Energy Consumption
Establish the present daily energy basis. Backup-load design remains a later step.
Monthly Consumption
Enter the average monthly energy from the utility bill.
DAILY ENERGY CONSUMPTION—kWh/day
Show Calculation
Enter monthly consumption.
HYBRID STEP 3
PV Requirement
Calculate required PV capacity from daily energy.
PV Design Inputs
REQUIRED PV CAPACITY—kWp
Show Calculation
Complete the inputs.
HYBRID STEP 4
PV Module
Enter manufacturer datasheet values used by PV and matching checks.
Identification & Electrical Data
HYBRID STEP 5
PV Array
Select a practical series/parallel configuration.
Configuration
Calculated Quantity—
Installed PV—kWp
Configuration—
String Voc / Vmp—
Array Isc / Imp—
HYBRID STEP 6
Hybrid Inverter
Enter the manufacturer values required for PV-side matching.
Identification, AC & PV Input
Prepared battery-side fields — not used in Steps 2–7
HYBRID STEP 7
Inverter ↔ PV Array Matching
Validate the proposed PV array against the Hybrid inverter PV input.
Site Assumption & MPPT Allocation
PV-side matching only
Battery matching and Hybrid operating checks are intentionally not implemented in this phase.
HYBRID STEP 8
Backup Load Requirement
What does the customer want to keep running during an outage?
Separate from monthly consumption
This table represents selected backup loads only. It does not assume the entire household is backed up.
Critical / Backup Loads
Connected power and energy are calculated per row.
| Appliance / Load | Quantity | Rated Power (W) | Backup Hours | Connected Power | Backup Energy |
|---|
Total Backup Connected Power—W
Total Backup Energy Requirement—Wh
Show Calculation / Why? / Source
HYBRID STEP 9
Battery Selection & Sizing
Select a preliminary battery and size the bank against Step 8.
Battery Identification & Primary Data
Manufacturer limits and optional information
Formula / Substitution / Result / Why? / Source
HYBRID STEP 10
Inverter ↔ Battery Matching
Check the selected battery bank against the Hybrid inverter battery interface.
Preliminary compatibility only
Aggregate current capability does not approve cabling, protection, BMS operation, communications, or manufacturer parallel installation requirements.
COMING NEXT
Not Yet Implemented
This equipment-matching stage is intentionally outside the current On-Grid Basic Design scope.