Solar Equipment Research
Solar Equipment Comparison Worksheet
Compare installer proposals by the equipment details that affect estimate quality: panels, inverter architecture, battery assumptions, warranty ownership, monitoring, and project scope. This is a quote-review worksheet, not a product ranking.
Equipment decision flow
Panels
Inverter
Battery
Quote
How to use this worksheet
- Run the calculator and note system size, panel count, and roof-space estimate.
- Ask each installer to identify equipment models, warranty documents, and exclusions.
- Treat missing model numbers, bundled battery economics, and vague net pricing as review flags.
Panel line
Use this to connect panel count, panel wattage, roof space, and warranty language back to the calculator estimate.
Exact panel make and model
A model number lets you verify wattage, size, warranty, and datasheet details.
Quote only says premium panel, Tier 1 panel, or a wattage range.
Panel watts and panel count
System size should roughly match panel count multiplied by panel wattage.
System kW, panel count, and panel watts do not reconcile.
Product and performance warranty
Product warranty and long-term output warranty are different promises.
Warranty is described only as 25 years without details.
Questions to ask
- What exact panel make, model, wattage, and dimensions are included?
- Does panel count multiplied by panel wattage match the quoted system size?
- Which product warranty and performance warranty documents apply?
Inverter line
Compare inverter architecture because shade, monitoring, battery readiness, and service responsibility can differ.
Inverter architecture
String, optimizer, microinverter, and hybrid systems can behave differently in shade or battery designs.
Quote does not say string inverter, optimizers, microinverters, or hybrid inverter.
Monitoring and service
Monitoring visibility and replacement labor can affect ownership experience.
Monitoring is promised but service owner, labor, or warranty process is unclear.
Battery compatibility
A battery plan may require compatible inverter hardware or later upgrade work.
Battery readiness is implied but no compatibility details are shown.
Questions to ask
- Which inverter architecture is included, and why was it chosen for this roof?
- Who handles inverter monitoring, warranty service, and replacement labor?
- Does this inverter support the battery plan now or require an upgrade later?
Battery line
Separate battery backup value from solar-only savings so payback math does not become misleading.
Usable kWh
Usable capacity drives backup-hour planning more than headline capacity.
Quote lists battery brand or total capacity but not usable capacity.
Continuous and peak output
A battery may store enough energy but still be limited in which loads can run at once.
Quote does not explain backed-up loads or power output limits.
Battery-only economics
Battery savings depend on rate spread, export value, rebates, and resilience value.
Battery cost is blended into one payback number without separate assumptions.
Questions to ask
- What usable kWh, continuous output, and peak output are included?
- Which loads will be backed up, and is a critical-load panel included?
- Is battery payback shown separately from solar-only payback?
Scope and ownership
Normalize the boring details before comparing price: labor, permits, upgrades, monitoring, and warranty ownership.
Included labor and electrical work
Panel upgrades, trenching, roof work, and service calls can change the real price.
Quote excludes required work or says it will be priced later.
Permitting and interconnection
Permit, inspection, and PTO steps can affect schedule and final activation.
No one is named as responsible for permit, interconnection, and inspection follow-up.
Financing and incentive assumptions
Net price can hide dealer fees, tax-credit assumptions, escalators, or unverified rebates.
Quote leads with a net price but does not show gross price and every assumption.
Questions to ask
- What work is included, excluded, or priced later?
- Who owns permit, inspection, interconnection, monitoring, and warranty follow-up?
- Is the advertised net price backed by verified incentives and clear financing terms?
Publication guardrails
SolarCalcNow keeps individual product pages out of the sitemap until each record has reviewed source evidence, warranty documents, disclosure status, and a clear reason it is publishable. This worksheet helps compare proposals before that product-specific layer exists.