OpenSolar vs Solarius-PV

OpenSolar9.0Visit SPSolarius-PV6.7Visit

Higher score OpenSolar #1 in Solar Software 9.0/10 Free plan · 30-day trial Free plan✓ 0 of 5 features Visit OpenSolar

vs

SP Solarius-PV #8 in Solar Software 6.7/10 From €599 · 30-day trial ✓ 2 of 5 features Visit Solarius-PV

• OpenSolar fits best

  Solar teams wanting an end-to-end workflow at no cost

• Solarius-PV fits best

  BIM-oriented teams needing detailed PV design

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Side by side

Feature	OpenSolar 9.0/10 Visit ↗	SPSolarius-PV 6.7/10 Visit ↗
At a glance
Editor score	9.0	6.7
Ranking	#1 in Solar Software	#8 in Solar Software
Best for	Solar teams wanting an end-to-end workflow at no cost	BIM-oriented teams needing detailed PV design
Pricing model	Free plan + paid	Paid
Starting price	Not published	Not published
Free plan	✓ (best)	—
Free trial	—	—
Free trial length	30 days	30 days
Deployment	Cloud	Desktop
Platforms	Web, iOS, Android	Windows
Support	Docs	Phone
Compliance	SOC 2, GDPR, 2FA	GDPR, ISO 27001
Integrations	10 integrations	9 integrations
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features OpenSolar 0/5 · Solarius-PV 2/5
PV design & simulation	Not published	✓ (best)
Financial modeling	Not published	✓ (best)
Proposal builder	Not published	—
System monitoring	Not published	—
Permit documentation	Not published	Not published
Specs
Deployment platform	Not published	Desktop
Our review
Pros	Free core app includes design, proposals and project management. Combines CRM, financing, e-signature, payments and equipment ordering. Web and mobile apps, plus integrations with tools such as Xero and Google Calendar.	Combines 3D/BIM modeling with irradiation and shading analysis Automates generator configuration, cable sizing and single-line diagrams Includes financial analysis and technical project-document generation
Cons	API access and selected connectors are paid add-ons. API and connector pricing varies by region or organization. API access has a 30-day free trial rather than being part of the free core app.	Runs on Windows only Costs €599 as a one-time purchase Focused on design and documentation, not monitoring portals or proposal building
Our verdict	Solar installers and electrification professionals can use OpenSolar to manage work from system design through project delivery. Its free Core OpenSolar app combines AI-assisted solar design, customizable proposals, CRM, project… Read the review →	Solarius-PV is desktop software for designing and sizing grid-connected photovoltaic systems. ACCA software positions it for engineers, architects, installers and other construction professionals, with workflows for roofs, façades,… Read the review →

Strengths and trade-offs

• OpenSolar — where it wins

  • Free core app includes design, proposals and project management.
  • Combines CRM, financing, e-signature, payments and equipment ordering.
  • Web and mobile apps, plus integrations with tools such as Xero and Google Calendar.

  Where it doesn't

  • API access and selected connectors are paid add-ons.
  • API and connector pricing varies by region or organization.
  • API access has a 30-day free trial rather than being part of the free core app.

• Solarius-PV — where it wins

  • Combines 3D/BIM modeling with irradiation and shading analysis
  • Automates generator configuration, cable sizing and single-line diagrams
  • Includes financial analysis and technical project-document generation

  Where it doesn't

  • Runs on Windows only
  • Costs €599 as a one-time purchase
  • Focused on design and documentation, not monitoring portals or proposal building

• OpenSolar9.0/10 · Free plan · 30-day trial

  A free core app covers solar design, sales and project management in one workflow.

  Visit OpenSolarFull verdict →
• SPSolarius-PV6.7/10 · From €599 · 30-day trial

  A Windows desktop PV design tool for teams working across BIM, electrical sizing and project economics.

  Visit Solarius-PVFull verdict →