Power System Planning Worksheet

TORVEN POWER

Torven Power planning packet

Plan the system before choosing the equipment.

Capture critical loads, energy goals, exact model numbers, site constraints, and unresolved questions in one printable handoff.

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EnergyHow many watt-hours must the battery deliver?
PowerWhat must run together, and what has startup surge?
CompatibilityDo exact models, limits, protocols, and site conditions align?
List critical loads

Record running watts, startup events, hours, timing, and priority.

Separate energy from power

Battery kWh affects duration. Current and surge affect equipment loading.

Record exact models

Family names and nominal voltage do not prove compatibility.

Hand questions forward

Assign unresolved items to the qualified person who owns the decision.

Planning boundary

This worksheet organizes information. It does not approve a system, replace current manufacturer instructions, or replace site-specific review by qualified electrical, structural, permitting, inspection, or utility professionals.

Project record
Optional. This page does not send the information anywhere.

Step 1 · Measure demand

Critical Load Inventory

Start with measured information

Use a plug-in meter, equipment nameplate, current manual, or installer measurement where practical. Startup watts are separate from running watts. Refrigerators, pumps, compressors, and motors may cycle.

List up to ten loads. “Same time?” means the load is expected during the maximum simultaneous operating window.
Load / circuit Qty Run W each Start W each Hours / day Same time? Priority Daily Wh

Uses quantity × running watts × hours for daily energy. “Same time” running watts are summed only for rows marked Yes. Startup wattage remains a separate planning check.

Load summary

Wh/day
W
W
hours
Daily load energy (Wh) = quantity × running watts × hours used Do not add startup watts as though they run all day. Use startup information for the separate surge review.

Step 2 · Separate energy from power

Battery and Inverter Planning

DurationDaily energy

How many kWh must be delivered over the target period?

CapacityNominal bank

Apply usable fraction, efficiency, and an explicit planning reserve.

PowerCurrent and surge

Review simultaneous load, startup behavior, and bank limits separately.

Energy assumptions
kWh
days
%
%
%
kWh
Nominal battery kWh = load kWh × coverage days ÷ usable fraction ÷ efficiency, then add reserve Percent fields are converted to decimals. This is a planning estimate, not a product selection or approved design.

The module count rounds up to the next whole module. Confirm the exact model’s approved parallel limit, current sharing, communications, cabling, and system architecture.

Nominal bank estimate —
Whole modules by energy —
Recorded parallel limit —
Planning status Enter assumptions
kWh
From current exact-model documentation.

Separate current and surge check

Power-side assumptions
W
W
V
%
A
A

Estimated DC current = AC watts ÷ nominal battery voltage ÷ inverter efficiency. The result does not size conductors or protection.

Current planning is more than one number

Actual design must address surge duration, BMS behavior, conductor ampacity, voltage drop, busbars, disconnects, overcurrent protection, terminal limits, and approved current sharing.

Exact equipment under consideration

Step 3 · Check every controller limit

Solar Array and MPPT Precheck

Use exact nameplates and current manuals

Cold-weather PV voltage can rise above standard-test-condition Voc. A controller may have separate voltage, output-current, and PV-watt limits. Passing one limit does not pass the others.

Solar module and array configuration
W
V
A
%/°C
°C
V
Enter the value from the approved manufacturer or installer method.
Controller and battery limits
V
V
A
W

Uses nameplate values you enter. It does not issue pass/fail approval. Cold string Voc uses the separate cold-adjusted module Voc field, not an assumed temperature formula.

Calculated planning checks

W
V
A
A
A
Manual review record
This precheck is not an approval

It does not select conductors, connectors, overcurrent protection, grounding, disconnects, or code requirements. Confirm cold-weather Voc, current, polarity, terminal limits, battery settings, and the exact controller manual before connection.

Step 4 · Verify the exact system

Mechanical and Compatibility Checklist

Exact-model record
Compatibility evidence
Site and mounting notes
Compatibility cannot be inferred from voltage alone

Two products with the same nominal voltage may still differ in operating windows, current limits, protocols, pinouts, firmware, approved topology, cables, terminals, enclosure fit, and required settings.

Step 5 · Close the gaps

Pre-Installation Handoff

Identify who owns every remaining decision

The goal is not to approve the project here. Assign the remaining design, code, procurement, installation, commissioning, training, and support decisions to the responsible party.

Documents and approvals
Responsibility and contact record
Open issues and final decisions
Safety and scope disclaimer

This worksheet is a planning and communication aid only. It is not an electrical or structural design, permit package, code checklist, compatibility approval, or instruction to work on energized equipment. Exact current manuals, equipment revisions, site conditions, utility and authority-having-jurisdiction requirements, and review by qualified professionals govern. Do not buy, mount, wire, energize, or connect equipment based only on worksheet results.

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Torven Power System Planning Worksheet · Browser-only and printable · Reviewed August 18, 2026