There is a particular kind of software review that goes looking for faults and finds them by narrowing the definition of the job. This review refuses that trick. HOMER Pro is the long-established tool for designing and optimising microgrids and hybrid power systems, and it holds that position because it earned it. The honest question is not whether HOMER Pro is good. It is what happens to your project after HOMER Pro has finished answering its question.
Direct answer. HOMER Pro optimises the mix of generation and storage at a site and ranks the options on lifecycle cost. For microgrid, off-grid, and hybrid work it is the standard tool and deserves that standing. It does not do roof layout, 3D near-shading, string design, drawings, or customer proposals. HOMER Pro decides the architecture. A design platform builds the array.
TL;DR
- HOMER Pro is the established tool for microgrid and hybrid system optimisation, and nothing in this review disputes that.
- Its real strength is techno-economic optimisation: searching many system configurations and ranking them on lifecycle cost.
- It is not a PV layout tool. No roof layout, no 3D near-shading scene, no string design, no drawings, no proposals.
- Its output is an optimised specification, not a buildable design. Treating the two as the same leaves the engineering undone.
- SurgePV covers design, module-level shading, single-line diagrams, DWG export, and white-label proposals in one licence at $1,299 to $1,899 per user per year.
What HOMER Pro Is and Who It Is Really For
HOMER Pro is software for designing and optimising microgrids and hybrid power systems. You describe a site, a load, and a set of candidate components, and it works out which combination of those components serves the load at the lowest lifecycle cost.
The component list is the point. HOMER Pro models PV, batteries, diesel or other generators, wind, and grid connection together. Very few tools attempt that combination honestly. Most PV software assumes the grid is there and behaves.
The intended user is a systems engineer or a project developer working before the design stage. Someone asking whether a remote mine should run on diesel, on solar plus diesel, or on solar plus storage plus a smaller diesel set. That is a sizing and architecture question, and HOMER Pro is built for it.
It is not built for the designer with a roof survey and a permit deadline. That is a statement of scope, not a complaint.
Techno-Economic Optimisation, Explained Properly
This section deserves generosity, because optimisation is where HOMER Pro genuinely leads.
Most simulation tools answer one question at a time. You define a system, you run it, you read the result. If you want to compare five battery sizes against three generator ratings, you build fifteen models and keep a spreadsheet.
HOMER Pro inverts that. You give it ranges rather than fixed values, and it searches the space of possible configurations. Then it ranks the results on lifecycle cost, so the output is not a single answer but an ordered field of answers with the economics attached.
That ordering is the valuable part. It tells you not just what the best system is, but how much worse the second option is. A configuration that costs two percent more but halves the diesel dependency is often the one that gets built, and you only see it because the search surfaced it.
The economics are first-class inputs rather than a post-processing step. Fuel cost, capital cost, replacement schedules, and operating cost all sit inside the optimisation. Change the diesel price and the recommended architecture can change with it. That is exactly what a developer needs when a fuel contract is uncertain.
The tool has also been used widely in academic and development work for years, so the method is well understood by the people who review these studies.
Where HOMER Pro Matters Commercially
It is easy to read microgrid software as a niche concern. In large parts of the world it is the mainstream case.
Markets with weak or unreliable grids need this class of tool as a matter of course. Parts of Africa and South Asia, island systems, remote industrial sites, and rural electrification programmes all share the same structural fact: the grid is either absent, expensive, or unreliable enough that generation and storage have to be sized deliberately.
In those markets the first question is never “how many modules fit on the roof”. It is “what mix of solar, battery, and generator serves this load through the year without running out of fuel or money”. That is HOMER Pro’s question exactly.
A solar EPC moving into this work needs the capability. If you have only ever built grid-tied rooftop, your instincts are wrong for a site where the load must be met from what you install. Sizing by rule of thumb produces either an oversized system nobody funds or an undersized one that fails in the third week of monsoon. Development finance and donor-funded programmes also expect this class of study before they release money.
The architecture decisions that follow are worth understanding properly, and our guides on DC vs AC coupling and lithium ion vs flow batteries cover the two choices that most often decide a hybrid system’s cost.
What HOMER Pro Deliberately Does Not Do
The boundaries here are scope decisions. HOMER Pro never claimed this ground and does not pretend to.
It is not a PV layout tool. There is no roof layout. You do not trace roof planes, place modules around obstructions, or resolve setbacks and walkways. HOMER Pro takes a PV capacity, not a drawing of a specific building.
There is no 3D near-shading scene. You cannot build the parapet, the neighbouring block, and the rooftop HVAC unit as geometry and let the model resolve their shadows across the year from a real obstruction survey.
There is no string design. Module counts per string, inverter MPPT allocation, and string topology sit outside its scope entirely.
It produces no drawing set. No single-line diagram for the permit package, no DWG for the drafter, no layout sheets for the crew.
It produces no customer proposal. There is no branded, customer-facing document with your logo and a savings narrative.
It is not the reference for bankable PV-only yield. Where a lender reviews a yield study on a grid-tied plant, PVsyst remains the tool of record. The head-to-head sits in our HOMER Pro vs PVsyst hybrid simulation comparison.
Specification Versus Buildable Design
This is the distinction that matters most, and it is where teams lose money.
HOMER Pro gives you an optimised system specification. So many kilowatts of PV, so many kilowatt hours of battery, a generator of a given rating, and a lifecycle cost that justifies the choice. That specification is a real engineering output and it took real work to produce.
It is not a buildable design. Nothing in it tells you where the modules go, how the array clears the obstructions on that roof, how the strings are arranged, what the single-line diagram looks like, or what the customer signs. The gap between those two artefacts is the entire detailed design phase, and because the specification looks complete, teams underestimate it.
Here is the concrete mechanism. A developer runs the optimisation and gets 480 kW of PV as the recommended capacity. The proposal goes out on that number. Then the design team surveys the site and finds the available roof, after setbacks, walkways, and the shaded southern bay, holds 390 kW at the chosen module. The optimisation assumed a capacity the site cannot physically carry.
Now the economics are wrong, because the battery and generator were sized against a PV output that will not exist. The optimisation has to be rerun with a real capacity constraint, and the proposal has to be withdrawn or renegotiated. That is a commercial problem created by treating a specification as a design.
The fix is unglamorous. Establish the buildable array early, feed the real capacity and the real shaded yield back into the optimisation, and let the two converge before anything goes to a customer.
HOMER Pro and SurgePV: A Sequence, Not a Rivalry
Two framings before the table. First, these tools do not compete. They sit at different points in the same project and answer different questions. Second, the order matters: architecture first, then array.
SurgePV is a browser-based solar design platform. It runs 8,760-hour simulation with module-level shading, mismatch, and string topology, then produces single-line diagrams and DWG export from the same model, plus a white-label proposal layer, in one licence at $1,299 to $1,899 per user per year.
| The job | HOMER Pro | SurgePV |
|---|---|---|
| Question answered | What mix of generation and storage should this site have? | What exactly goes on this roof, and what do I hand over? |
| Project stage | Feasibility and architecture | Detailed design and delivery |
| Intended user | Systems engineer, developer, researcher | Installer, EPC designer, proposal engineer |
| Optimises across many configurations on lifecycle cost | Core strength | Not the same purpose |
| Models diesel, wind, and grid alongside PV and storage | Yes | PV design focused |
| Detailed roof layout | Not provided | Yes |
| Module-level shading and mismatch | Not provided | Yes |
| String topology | Not provided | Yes |
| Hourly 8,760 simulation | Yes | Yes |
| Single-line diagram | Not provided | Produced from the same model |
| DWG export | Not provided | Produced from the same model |
| White-label customer proposal | Not provided | Included |
| Delivery | Desktop application | Browser-based |
| Price | Licence-based, quoted by module and term | $1,299 to $1,899 per user per year |
There is no losing column. There is a handover point, and the table shows you where it sits.
Try the software behind this review
Let HOMER Pro pick the architecture. Build the array in a browser.
SurgePV runs 8,760-hour simulation with module-level shading, mismatch, and string topology, then produces the single-line diagram, the DWG, and the white-label proposal from the same model. One licence, one array, one number.
Book a free SurgePV demo →No credit card. 20-minute walkthrough on one of your own projects.
Who Needs Both, and In What Order
Licence HOMER Pro if you bid off-grid, weak-grid, island, or remote industrial work, or if you size hybrid systems where a generator or a battery carries part of the load. Pricing is licence-based and quoted by module and term, so scope it against the modules you will actually use. The wider per-seat picture sits in our solar design software pricing breakdown.
Run SurgePV as the daily driver if your job is to put modules on a specific site and hand something to a customer and an inspector. That is true whether the project is grid-tied or part of a hybrid system, because the PV component still has to become a real array.
Run both, in sequence, if you do hybrid work end to end. HOMER Pro settles the architecture and the economics. SurgePV turns the chosen PV capacity into a layout with modelled shading, a string design, a single-line diagram, a DWG, and a proposal. Then feed the modelled yield back and confirm the optimisation still holds.
Keep a PVsyst seat as well if a lender reviews a PV-only yield study. That has not changed and this review is not going to pretend otherwise.
If drawing production rather than software is your real bottleneck, our solar rooftop detailed engineering design team produces the full construction pack. See the sample design pack or talk to our team.
What Most Buyers Get Wrong About HOMER Pro
They read the optimisation output as a finished engineering deliverable.
The reasoning is understandable. The report is quantitative, the lifecycle costs are itemised, and the recommended configuration arrives with a ranking behind it. It looks like the answer because in its own terms it is the answer.
Here is the mechanism that costs money. A company standardises on HOMER Pro for hybrid projects, so the detailed design step never gets an owner. Layout drifts to whoever has AutoCAD open. Shading becomes an assumed percentage rather than a modelled result from a real obstruction survey. The proposal becomes a slide deck someone maintains by hand, quoting a capacity the roof was never checked against.
Six months in, the company has an optimisation model, a CAD drawing, and a customer proposal that describe three slightly different systems. None of that came from a flaw in HOMER Pro. It came from asking an architecture tool to be a design workflow.
The Verdict
HOMER Pro is the right tool for the question it asks, and that question is not the one an installer faces on Monday morning.
For microgrid and hybrid optimisation it is the standard, and if you bid weak-grid or off-grid work you should licence it without much agonising. The ability to search configurations and rank them on lifecycle cost is genuinely hard to reproduce, and no PV design platform does it.
Here is the opinionated call. If you are a working installer or EPC and you are using HOMER Pro output as your design document, you have skipped a phase rather than saved one. The layout, the shading study, the string design, the drawings, and the proposal all still have to exist. Right now somebody on your team is producing them by hand, against a capacity nobody has confirmed the site can hold.
Run SurgePV for the design and delivery workflow at $1,299 to $1,899 per user per year, keep HOMER Pro for the architecture question on hybrid projects, and add a PVsyst seat where a lender reviews the yield. That combination is honest about what each tool is for.
Conclusion
- HOMER Pro is the standard for microgrid and hybrid optimisation and deserves the respect. Ranking configurations on lifecycle cost is its real strength, and it does it better than anything a PV design tool offers.
- Its output is a specification, not a buildable design. The layout, shading study, string design, drawings, and proposal are all still ahead of you.
- The sequence is architecture first, then array. HOMER Pro decides the mix. A design platform turns the PV component into something a crew can build and a customer will sign.
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Disclosure and accuracy note
Commercial relationship. Heaven Designs and SurgePV are part of the same group. Treat our recommendation of SurgePV as a vendor making its own case, not an independent verdict. We have tried to describe every other product fairly, and to say plainly where a competitor is the better choice.
Pricing. All prices are indicative, compiled from public sources when this page was written. They vary by tier, region, contract term and exchange rate, and change without notice. Several vendors quote rather than publish, and some price in currencies other than the US dollar, so a converted figure moves with the exchange rate. Confirm current pricing with the vendor before you decide anything.
Trademarks and corrections. All product names and trademarks belong to their respective owners, and are used here for identification and comparison only. Their use does not imply affiliation with or endorsement by those companies. If anything here is out of date or wrong, tell us and we will correct it.
FAQ
Is HOMER Pro good software? Yes. It is the long-established tool for designing and optimising microgrids and hybrid power systems, and it is widely used in off-grid, island, remote industrial, and rural electrification work as well as in academic and development projects. Its core strength is ranking many system configurations on lifecycle cost.
Can HOMER Pro design a solar rooftop layout? No. HOMER Pro works with system capacities, not roof geometry. There is no roof layout, no 3D near-shading scene built from an obstruction survey, and no string design. Layout work needs a PV design platform.
Can HOMER Pro produce permit drawings or a customer proposal? No to both. There is no single-line diagram output, no DWG export, and no branded customer-facing proposal. Teams that standardise on HOMER Pro end up producing those deliverables by hand in other tools.
How much does HOMER Pro cost? Pricing is licence-based and sold by module and term, so the figure depends on which modules you need and how long you licence them. Scope it against the work you actually bid rather than buying the widest configuration by default.
Is HOMER Pro a replacement for PVsyst? No. They answer different questions. HOMER Pro optimises the generation and storage mix. PVsyst remains the reference for bankable PV-only yield studies, and lenders expect it. The two are compared directly in our HOMER Pro vs PVsyst hybrid simulation piece.
Should I use HOMER Pro and SurgePV together? For hybrid and off-grid work, yes, and in that order. HOMER Pro settles the system architecture and the economics. SurgePV then turns the chosen PV capacity into a real array with 8,760-hour simulation, module-level shading, string topology, single-line diagrams, DWG export, and a white-label proposal in one licence.
Related: the head-to-head in HOMER Pro vs PVsyst hybrid simulation, the cost picture in solar design software pricing, the architecture decision in DC vs AC coupling, and the storage choice in lithium ion vs flow batteries.
