Solar workflow depth
Can the product carry system details, proposal status, project milestones, and the delivery handoff without rebuilding the process in custom fields?
Quickest Solar CRM is our first pick for a small Tongan installer whose immediate problem is slow quoting and follow up that nobody owns. That placement uses a disclosed proposal-first adoption lens and still requires a Tonga proof step. OpenSolar is the clearest free design-first option, Pylon pairs design with an optional CRM, and Sunbase publishes wider solar operations. We compared seven tools against TOP documents, adviser-approved consumption tax, Tonga Power connection stages, outer island logistics, cyclone-rated design, remittance-funded purchases and handover.
Direct answer
Choose Quickest when proposal speed, lead ownership, field adoption and a free pilot are the first priorities. QuickEstimate owns Quickest and its published evidence is India-first, so Tongan currency, tax, Tonga Power fields, island logistics, hosting and support all remain unverified until a demo proves them. OpenSolar is better when free solar design leads the purchase, and the free core platform matters in a market this size. Pylon and Sunbase deserve tests where storage design or island scheduling dominate. Zoho and Odoo suit anyone holding stock on more than one island group.
7 jobs, 7 picks
A useful shortlist starts with the sales or delivery bottleneck. Each winner below reflects a different buying priority, while the overall ranking rewards a CRM that a solar sales team can adopt quickly.
Small mobile sales teams
Free: 1 user and 10 proposals monthly. Pro: INR 6,999 per user yearly, minimum 3 users. 02Best free design-first optionOpenSolarStartups combining solar design, proposals and project CRM
OpenSolar says partners fund the model; review services and connected costs. 03Best compact design and CRM trialPylonTeams wanting solar and battery proposals with optional CRM
New users receive five Standard Project credits; confirm Tonga commercial terms. 04Best broad solar operations candidateSunbaseEstablished teams evaluating a wider solar sales and project platform
Request Tonga users, modules, implementation, integrations, support and renewal pricing. 05Best configurable general CRMZoho CRMTeams with an administrator and several sales or service lines
The reviewed global page publishes USD prices and adds local taxes. 06Best configurable operations suiteOdooBusinesses joining CRM with sales, inventory, field service and accounting
Confirm current plan, apps, users, hosting, implementation, localisation and customisation. 07Best for marketing-led acquisitionHubSpot CRMTeams prioritising forms, email, meetings and pipeline
Official page states up to 2 free users and 1,000 contacts; price all required hubs.How we evaluated
We saved English and Tongan search attempts across Google, Bing, DuckDuckGo, Brave and Mojeek, then traced one record from an enquiry through site visit, load assessment, quotation, deposit, structural and electrical design, the Tonga Power application, procurement, inter-island freight, installation, meter change, commissioning, invoicing, handover and service. Ranking rewards focused sales adoption first, then solar design, operational breadth, field usability, finance fit and configurable CRM depth. Tonga facts come from Tonga Power Limited and the Ministry of Revenue and Customs, which were the official sources that responded when we checked on the reviewed date.
Can the product carry system details, proposal status, project milestones, and the delivery handoff without rebuilding the process in custom fields?
Can managers route leads, track activity, automate follow-up, forecast revenue, and see why an opportunity stalled?
Can a rep move from site information to a credible customer proposal, and how much specialist solar design happens inside the platform?
Does the workflow support the language, currency, tax, communications, documents, and handoffs common in Tonga?
What setup, migration, training, administration, and extra software does the apparent subscription require?
At-a-glance matrix
The table separates CRM depth from proposal, design, and operations coverage. Confirm plan limits and country availability in writing before signing.
Local billing check: confirm TOP pricing, tax treatment, contract currency, and payment fees in writing.
| Platform | Best for | Public price | Solar proposals | Design | Project operations | CRM depth | Free access |
|---|---|---|---|---|---|---|---|
| 1Quickest Solar CRM | Small mobile sales teams | Free plan; Pro in INR | Focused branded proposals | Tonga inputs unverified | Lead stages and follow up | Focused solar sales CRM | 1 user, 10 proposals monthly |
| 2OpenSolar | Startups combining solar design, proposals and project CRM | Free core platform | Interactive and PDF proposals | Native solar and storage design | Project CRM, tasks, schedules and files | Solar project CRM | Core platform described as free |
| 3Pylon | Teams wanting solar and battery proposals with optional CRM | Dollar pricing shown; confirm currency | Web and PDF proposals | Solar and battery design | Optional solar CRM and integrations | Solar CRM available | Five Standard Project credits |
| 4Sunbase | Established teams evaluating a wider solar sales and project platform | Quote required | Solar proposal capabilities published | Connect or verify design scope | Sales and operational solar workflows | Broad solar CRM | Request demo and trial terms |
| 5Zoho CRM | Teams with an administrator and several sales or service lines | Free for 3 users; paid USD tiers | Configure CPQ or connect a proposal tool | Specialist solar tool required | Custom modules, workflow, reports, portals and APIs | Broad general CRM | Free edition for 3 users |
| 6Odoo | Businesses joining CRM with sales, inventory, field service and accounting | One app free; paid plans published | Sales quotations and signatures | Specialist solar design required | CRM, sales, inventory, accounting, field service and more | General CRM within modular ERP | One app free plan stated |
| 7HubSpot CRM | Teams prioritising forms, email, meetings and pipeline | Free CRM; paid hubs available | Connect or configure proposal software | Specialist solar tool required | Paid sales and service expansion | Broad customer platform | Up to 2 users and 1,000 contacts |
Pricing and capability labels were checked against official sources on Sep 7, 2026. Currency conversion is intentionally omitted where a vendor does not publish a local price.
Country research
Tonga's solar case is strong because generation has leaned heavily on imported diesel, so the saving argument is genuine rather than marginal. The complications are logistical and climatic. Tongatapu, Vava'u, Ha'apai, 'Eua and the Niuas are separated by sea, so a service call is a scheduled journey. Cyclone exposure is severe and recent events have disrupted both power and communications for extended periods. And a large share of household purchases is funded by remittances, which changes the payment pattern a CRM has to record.
Tonga Power Limited generates and distributes electricity across the kingdom and is the counterparty for connection, metering and any grid-tied arrangement. Store the customer account, the tariff category taken from the actual bill, the island group, the meter type, the supply phase, the requested capacity, the application route, the reference, the technical review outcome, the fees, the inspection, the meter change, the activation and the completion evidence.
Tonga Power Limited: Tonga Power Limited ↗The Ministry of Revenue and Customs administers consumption tax and customs duty. A Tongan solar sale mixes imported equipment, freight, structural work, design, installation, batteries, maintenance and finance, and duty and clearance timing affect both the price and the promised date. Configure tax per line, retain the tax source and effective date, and have an adviser approve deposits, staged invoices, variations, credit notes and import treatment.
Ministry of Revenue and Customs Tonga: Ministry of Revenue and Customs ↗Diesel-based generation makes the saving argument unusually strong, which raises the standard for how it is documented. Store the tariff reference, the customer category taken from the actual bill, the units, the fixed charges, the self-consumption assumption, the degradation assumption, the approver and the date. A strong case badly documented is still a dispute waiting to happen when the first quarterly bill arrives.
Tonga Power Limited: Tonga Power Limited ↗Inter-island freight belongs in the sales record. Store the destination island group, the freight route, the sailing or flight schedule, the consignment cut-off, the handling agent, the expected arrival and any anticipated second shipment, then derive the customer commitment date from those fields. On Ha'apai or the Niuas a missed sailing can hold a job for weeks rather than days.
Tonga Power Limited: Tonga Power Limited ↗Cyclone exposure makes the mounting specification a compliance artefact. Store the wind loading assumption, the standard referenced, the mounting system and its certification, the fixing type and spacing, the roof structure assessment, the approving engineer, the date and the installation photographs. Recent events in the region have shown that the record, not the memory, is what supports a claim afterwards.
Ministry of Revenue and Customs Tonga: Ministry of Revenue and Customs ↗Remittance funding changes the payment pattern. Store the payer where it differs from the customer, the country the payment came from, the transfer reference, the currency received, the fees deducted, the instalment plan agreed and the customer authorisation. A deposit that arrives from an overseas relative under a different name is normal here and should not require a manual reconciliation every time.
Ministry of Revenue and Customs Tonga: Ministry of Revenue and Customs ↗Extended communications outages after major events are a real operating condition rather than a hypothetical. Test the field application after a full day offline with a complete survey queued, then after replacing the device, and confirm that the record can be reconstructed from local storage. A system that assumes continuous connectivity will fail exactly when the company is busiest.
Tonga Power Limited: Tonga Power Limited ↗Off-grid and outer island systems carry a service tail with no local technician and limited spares. Record the battery chemistry, cycle warranty, expected replacement date, the monitoring arrangement, credential holder, the service interval, parts held on each island, the trained local contact and the escalation path. A record that ends at commissioning cannot support a system a sailing away.
Tonga Power Limited: Tonga Power Limited ↗Because everything is imported, quotation validity turns on landed cost and shipping timing. Store the cost basis, the freight assumption, the validity period, the ordered stock and the clearance position, and prevent acceptance at a stale price without approval. With infrequent sailings, a job can stay open long enough for the price basis to move underneath it twice.
Ministry of Revenue and Customs Tonga: Ministry of Revenue and Customs ↗Full reviews
Each review explains the useful workflow, the buyer who should shortlist it, and the country-specific question that a sales demo must answer.
Quickest is first for a narrow mobile sales adoption goal, and third-party payer matching is what it must prove here.
Quickest centres the work a small team usually has to fix first: capture the enquiry, assign an owner, produce a branded proposal quickly and make the next follow up visible. A limited free plan allows an adoption pilot before a larger migration. QuickEstimate owns Quickest and publishes this ranking, so the position depends on the disclosed method rather than on independent market recognition.
No public evidence verifies TOP quoting with validity, Tongan consumption tax, Tonga Power fields, island group filtering, freight scheduling, remittance payer matching or extended offline resilience. Run the pilot on a remittance-funded job, because if the tool cannot record a payer who differs from the customer, the finance work will stay in a spreadsheet regardless of how good the proposal looks.
Choose it if: Tongatapu quoting speed is the first bottleneck and payer matching works. Choose another platform if: outer island logistics, stock and storm service dominate the business.
OpenSolar is the strongest free design-first route for Tonga, and no core licence fee is a real advantage.
OpenSolar publishes design, proposals, table and Kanban project views, custom workflows, actions, schedules, documents, roles, permissions and an API. In a market where a recurring cross-border payment is itself an obstacle, a product with no core licence fee removes a barrier unrelated to software quality.
Validate Tongan imagery, irradiance, salt and humidity handling, storage and off-grid modelling, equipment libraries, TOP display, tax treatment, field connectivity and document output. Change a design after acceptance and trace price, stock, tax, payment, structural approval and handover. Review privacy terms, transfers, support coverage and a complete account export.
Choose it if: design and customer-facing proposals lead the purchase and capital is tight. Choose another platform if: freight, payer matching and island stock dominate the requirement list.
Pylon suits a Tongan team selling storage-backed systems, with local operation still unverified.
Pylon documents solar and battery design, web and PDF proposals, design history, integrations and a solar CRM add-on. It says new users receive credits for five Standard Projects and teams can add unlimited users. Its battery orientation matches a market where backup capability after a cyclone frequently matters more than pure yield.
Confirm the dollar currency, the payment method available to a Tongan business, project rules, CRM cost, taxes and renewal. Test Tongan locations, salt exposure, weather and production inputs, backup loads, battery chemistry, TOP display, offline use, roles and support. Review data processing and export, and model several revisions because outer island scope frequently changes after a site visit.
Choose it if: storage-backed proposals dominate the pipeline. Choose another platform if: freight, payer matching and island stock dominate instead.
Sunbase publishes broad solar CRM scope, and in a market this small the quoted price is the decisive question.
Sunbase positions its CRM around solar lead management, sales, communication, proposals, workflow and operational visibility. That suits a contractor delivering government, school, church and resort installations across island groups. With a small number of larger buyers, ask whether a platform price is proportionate to annual job volume.
Ask for comparable customer references and use a controlled demo from enquiry through survey, proposal, deposit, invoice, Tonga Power application, freight, installation, commissioning and service on two island groups. Verify TOP handling, island filtering, scheduling, roles, audit history, privacy terms, storage, support hours, the implementation owner, the contract price and data export.
Choose it if: a contractor works across island groups with service agreements. Choose another platform if: a free design tool or a simpler proposal CRM meets the immediate need.
Zoho suits a Tongan business that needs payer, island and freight records the platform can report on.
Zoho CRM offers configurable modules, fields, pipelines, workflow, reports, mobile apps, portals and APIs. Custom objects are the reason to consider it here: a remittance payer separate from the customer, a consignment with a sailing date and an installed asset with an island group can each be modelled properly rather than squeezed into a deal.
Build or connect load assessment, solar design, TOP quotations with validity, tax treatment, payment reconciliation with third-party payers, stock by island group, freight scheduling, Tonga Power stages, structural approvals, commissioning, assets, warranty and handover. Test processor terms, transfers, retention, API limits, support and a complete export.
Choose it if: the company has an administrator and works across island groups. Choose another platform if: the team expects ready-made solar workflows with little configuration.
Odoo fits a Tongan contractor whose imported stock and island service have outgrown a sales tool.
Odoo combines CRM with quotations, sales, accounting, purchasing, inventory, projects, field service, helpdesk and other applications, including multi-warehouse stock and landed cost handling. For a business holding parts on more than one island group, those modules address the constraint directly rather than at one remove.
Verify a workable localisation and the accounting route with the responsible implementation partner. Test TOP, consumption tax and duty, landed cost with freight, stock by island group, serial numbers, planned maintenance against installed assets, field service, approvals, Tonga Power and structural evidence, warranty and migration. Connect a specialist design tool and review hosting, backups, upgrades, exit and a restorable export.
Choose it if: stock, maintenance, accounting and CRM should share one suite. Choose another platform if: the business wants a solar-specific proposal product with minimal implementation.
HubSpot handles diaspora enquiries well and leaves freight, payer matching and island service outside.
HubSpot's free CRM covers contacts, lead management, forms, email, meetings and pipeline for a small user group. A meaningful share of Tongan household solar begins as an overseas enquiry from a family member, and email sequences, meeting scheduling and document tracking suit that opening conversation well.
Price and test the complete stack: messaging, solar design, TOP quotation with validity, tax treatment, payment reconciliation with third-party payers, stock by island group, freight scheduling, field delivery, Tonga Power tracking, structural evidence and service reporting. Use controlled fields for the island group, the payer, the tariff category and the structural approval.
Choose it if: overseas-funded enquiries drive a meaningful share of the pipeline. Choose another platform if: freight, payer matching and island service are the real problems.
Buyer guide
Choose by the most expensive broken handoff, then test that handoff using real opportunities, real users, and the documents your customers actually receive.
Start with Quickest when slow quoting and unowned follow up are the visible failures on Tongatapu residential work. Use the free plan on real Tongan opportunities, including one remittance-funded purchase. Continue only if the vendor proves TOP quoting with validity, tax handling, Tonga Power stages, payer matching, privacy, support and export.
OpenSolar fits a team that needs solar design, proposals and project CRM before it can fund a wider stack, and no core licence fee removes a cross-border payment obstacle. Validate Tongan imagery, irradiance inputs, salt and humidity handling, storage modelling, TOP display and mobile performance on an outer island.
Pylon is worth testing when web and PDF proposals, solar and battery design and an optional solar CRM all appeal, and storage matters because outages follow cyclones. Confirm the displayed currency, the payment method available locally, model inputs, backup load handling, revision economics, mobile use and support hours.
Sunbase targets broader solar sales and operational workflows, which suits a contractor delivering government, school, church and resort installations across island groups. Ask for comparable references and test island-aware scheduling, freight coordination, service level management, document control, privacy, commissioning and export.
A configurable platform can model stock by island group, freight consignments, remittance payers, Tonga Power applications, structural approvals and service agreements together. Odoo is stronger where multi-warehouse stock and planned maintenance dominate; Zoho is the more familiar CRM route with strong custom objects.
HubSpot fits a business whose first priority is forms, campaigns, email, meetings and pipeline visibility, and it suits diaspora enquiries that begin overseas by email before a family member in Tonga takes over. Budget the solar design, quotation, freight, tax, structural evidence and service tools around it.
Run the same three opportunities in every shortlisted CRM: one ordinary lead, one revision-heavy project, and one deal that already failed. This removes demo theatre and exposes repeated entry, stale documents, weak mobile adoption, and missing local support.
Capture a real lead, assign it, create the proposal, schedule follow-up, record acceptance, and hand it to delivery.
Change the system, equipment, price, payment route, and installation date. Identify every stale record.
Use a duplicate, missed follow-up, rejected proposal, or delayed job and ask the CRM to show what happens next.
Produce a taxable sale with separate lines for imported equipment, freight, structural work and services, plus a deposit, a staged invoice, a variation, a credit note, a refund and a warranty replacement in TOP. Store a validity period, the cost basis and the freight assumption, and block acceptance at a stale price without approval. Have an adviser confirm consumption tax and duty treatment in writing.
Store the island group on every record: the site, the stock location, the technician, the freight route and the service history. Test filtering the installed base by island group, dispatching a crew to Ha'apai and reporting margin per island. A system that treats Tonga as one territory will hide which island groups lose money on every job.
Store the destination island group, the freight route, the sailing or flight schedule, the consignment cut-off, the handling agent, the expected arrival, the customs position and any anticipated second shipment, and derive the commitment date from those fields. Test a missed sailing and confirm the schedule, the customer notification and the revised date all follow.
Capture the customer account, the tariff category from the actual bill, the island group, the meter type, the phase, the requested capacity, the application route, the reference, the technical review outcome, fees, the inspection, the meter change, the activation and the completion evidence. Test a rejection and a resubmission rather than trusting a stage name.
Store the payer where it differs from the customer, the source country, the transfer reference, the currency received, the fees deducted, the instalment plan agreed and the customer authorisation. Test a deposit from an overseas relative under a different name, a partial payment and a refund, and confirm reconciliation does not require manual work every time.
Store the wind loading assumption, the standard referenced, the mounting system and its certification, the fixing type and spacing, the roof structure assessment, the approving engineer, the date, installation photographs and the insurance position. Block commissioning sign-off when the structural approval is missing, and force re-approval when a design change alters the mounting.
Test the field application after a full day offline with a complete survey queued, then after replacing the device, and confirm the record can be reconstructed from local storage. Ask the vendor what happens to queued data if connectivity is unavailable for a week, because that is a documented condition in this region rather than an edge case.
Record the monitoring arrangement, credential holder, service interval, parts held on each island, the trained local contact, the technician who can attend, the transport required and the promised response time. Test a fault on Vava'u and confirm the CRM can show whether the spare is already there before anyone books a sailing.
Export the accepted scope, variations, the as-built design, the structural approval, installed equipment and serial numbers, photographs, test results, commissioning, Tonga Power evidence, invoices and payment status including the payer, warranties, manuals, monitoring access, training, signatures, open defects and the service contact, plus the island group and parts held there.
The real budget
Tongan pricing is not a currency conversion exercise, and for a small team the payment method matters as much as the price. Quickest publishes INR terms, OpenSolar describes its core platform as free, Pylon shows dollar prices whose billing currency should be confirmed, and Zoho publishes USD global tiers. Sunbase needs a quote for the relevant scope. Odoo and HubSpot vary by apps, seats, contacts and implementation. Ask for billing currency, the payment method available locally, taxes, bank charges, users, projects, storage, integrations, messaging, onboarding, support hours, renewal, exit and every product needed to reach a compliant invoice and a completed outer island job.
Free: 1 user and 10 proposals monthly. Pro: INR 6,999 per user yearly, minimum 3 users.
OpenSolar says partners fund the model; review services and connected costs.
New users receive five Standard Project credits; confirm Tonga commercial terms.
Request Tonga users, modules, implementation, integrations, support and renewal pricing.
Quickest lists one free user with ten proposals monthly and Pro at INR 6,999 per user yearly with a three-user minimum. Tongan commercial and tax terms are unverified.
OpenSolar states that its core platform is free because partners fund the model. Review partner choices, paid services, data use, support coverage and connected system costs.
Pylon offers five Standard Project credits to new users and states unlimited team users. Confirm the displayed currency, the payment method available locally, the CRM add-on and renewal.
Zoho's reviewed page offers three free users alongside paid USD tiers. HubSpot states up to two free users and 1,000 contacts. Neither free plan supplies a complete Tongan solar operating stack.
Confirm that the business can make and renew a foreign currency subscription payment before migrating a team onto a platform, because access rather than price is often the binding constraint.
Compare the cost of one complete acceptance case rather than a feature checklist, and price one unnecessary sailing alongside it. A service trip to an outer island that could have been avoided with better stored data is the clearest avoidable cost in this market.
Ask what happens to queued field data if connectivity is unavailable for a week. The commercial proposal should identify local storage limits, retry behaviour, conflict resolution, notification, data ownership and support escalation.
Our number-one pick
Quickest concentrates on lead ownership, a mobile proposal and the next follow up, which is a practical first adoption target for a small Tongan sales team.
Its free plan lets one person test ten monthly proposals before the company commits to migration, custom integration or additional seats.
First place stays conditional on proof. TOP handling with validity, tax treatment, Tonga Power evidence, island fields, remittance payer matching and outage resilience are not verified for Tonga.
Your next move
Start with Quickest and the specialist closest to your largest local requirement. Use the same evidence and test deals for both.
Name the bottleneck. Pick lead response, proposal speed, design, payment, install handoff, or management visibility.
Choose two tools. Compare Quickest with the strongest specialist for that bottleneck.
Run the Three-Deal Proof. Score adoption, repeated entry, revision handling, support, and full annual cost.
Research record
These sources support the market, regulatory, product, and pricing statements on this page. Product terms can change after the checked date.
Common questions
Quickest is first under our proposal-first adoption lens for a small team, but QuickEstimate owns it and Tongan localisation is unverified. OpenSolar is the better free design-first option and avoids a recurring cross-border payment. If you work across island groups, weight freight scheduling and offline resilience above quoting speed.
Because the payer is frequently not the customer. Store the payer, the source country, the transfer reference, the currency received, the fees deducted, the instalment plan and the customer authorisation. A deposit arriving from an overseas relative under a different name is normal here and should not require a manual reconciliation every time it happens.
We found no verified public evidence for native TOP proposals or Tongan consumption tax and duty handling. Quickest's published evidence is India-first. Require a live taxable quotation with equipment and freight lines and a validity period, plus a deposit from a third-party payer, a staged invoice, a credit note, a refund and an accounting export.
Because generation has leaned heavily on imported diesel, so displaced fuel cost is substantial rather than marginal. That raises the documentation standard rather than lowering it: store the tariff reference, the customer category from the actual bill, the units, the fixed charges, the self-consumption and degradation assumptions, the approver and the date behind every figure you show.
From stored freight data. Record the destination island group, the freight route, the sailing or flight schedule, the consignment cut-off, the handling agent, the expected arrival and any anticipated second shipment, and derive the commitment date from those fields. Test a missed sailing and confirm the notification and revised date follow automatically.
Hold everything locally and reconcile cleanly afterwards. Test the field application after a full day offline with a complete survey queued, then after replacing the device, and ask the vendor what happens if connectivity is unavailable for a week. Recent regional events make that a documented condition rather than a hypothetical.
As approved engineering evidence. Store the wind loading assumption, the standard referenced, the mounting system and its certification, the fixing type and spacing, the roof structure assessment, the approving engineer, the date, installation photographs and the insurance position. That record is what supports a claim after an event.
Quickest offers one user and ten proposals monthly. OpenSolar publishes a free core solar platform. Zoho offers three free users, and HubSpot states up to two users and 1,000 contacts. Before committing to a paid tier, confirm the business can reliably make the cross-border payment at renewal rather than only at signup.
Include the accepted scope, variations, the as-built design, the structural approval, installed equipment and serial numbers, photographs, test results, commissioning, Tonga Power evidence, invoices and payment status including the payer, warranties, manuals, monitoring access, training, signatures, open defects and the service contact, plus the island group and parts held there.
Use the Three-Deal Proof and require every vendor to show the same lead, revision, document, and failed handoff.