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Project Description: We are looking for an experienced WordPress developer with strong JavaScript skills to build a functional Solar PV Calculator using the Calculated Fields Form plugin. The calculator will help users in Greece estimate their solar system size, cost, and payback period. Key Features Required: 1. User Inputs: Monthly electricity consumption (kWh), Location/Region (Dropdown to determine Peak Sun Hours), System Type (Radio: Net-Billing vs Off-Grid), Available roof surface (m²). 2. Conditional Logic: Battery storage calculations should only appear if "Off-Grid" is selected. 3. Advanced JS Formulas: Implement precise formulas for required kW power, number of 450W panels needed, battery Ah (for off-grid), and estimated system cost. 4. Validation: Warning alerts if the required panel surface exceeds the user's available roof space. 5. Lead Generation: Integration with email forms so users can request a detailed PDF quote with their results. 6. Responsive Design: Clean layout that matches our website's CSS theme. Required Skills: • WordPress & Calculated Fields Form plugin • Advanced JavaScript / jQuery • HTML5 / CSS3 We have already ready the architecture and all JavaScripts for the program and we have Calculated Fields Form premium (paid version) Need to add this Solar Calculator in 4 wordpress sites We are looking for an experienced WordPress developer with strong JavaScript skills
Project ID: 40527286
153 proposals
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Active 6 days ago
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153 freelancers are bidding on average $122 USD for this job

With extensive WordPress and Calculated Fields Form plugin experience, I understand your need for a Solar PV Calculator for users in Greece. My strong JavaScript skills and past projects involving advanced JS formulas align perfectly with your requirements. Could you share the website's CSS theme for seamless integration? Regards, Yogesh Kumar
$120 USD in 10 days
8.5
8.5

Hello, This is exactly the kind of build where hidden complexity lives in the formulas, not the form fields. You already have the architecture and JavaScript ready, so I can focus on turning it into a reliable WordPress calculator across all 4 sites, with the conditional Off-Grid battery logic, roof-space validation, and clean theme matching. I’ve built and customized WordPress calculators, plugin-based quote tools, and JavaScript/jQuery-driven forms, including lead-gen flows that hand off results into email/PDF quote requests. I’ll implement the same logic consistently in Calculated Fields Form, make sure the solar sizing and payback calculations behave correctly, and align the UI with your existing CSS so it feels native on every site. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Could you share whether the formulas should be identical on all 4 sites or vary by brand/site? Also, is the PDF quote generated through an existing plugin or a custom endpoint? Finally, do you want the calculator to store leads in WordPress, send them by email only, or both? Looking forward to your reply so we can finalize the exact plan. Should the solar calculator use the same formulas and UX on all 4 sites, or does each site need its own regional pricing and configuration rules? Thanks, Asad
$130 USD in 3 days
8.3
8.3

Hi, I can help implement the Solar PV Calculator across all 4 WordPress sites using your existing Calculated Fields Form Premium setup, architecture, and JavaScript logic. Since the formulas and calculation flow are already prepared, my focus will be on: Integrating the calculator into Calculated Fields Form Implementing the conditional logic for Net-Billing vs Off-Grid Adding roof space validation and warning messages Ensuring battery calculations only appear when required Styling the calculator to match your website design Connecting the lead generation/PDF quote request workflow Testing all calculations and responsiveness across desktop and mobile I have experience with WordPress, custom JavaScript, jQuery, and advanced form calculations, and can ensure the calculator works consistently across all 4 websites while keeping the code maintainable. Ready to start immediately and review the existing architecture and JS files. ?
$115 USD in 7 days
8.4
8.4

Hi, I came across your project and would be happy to help. I have experience working with WordPress, JavaScript, and complex form calculations, and can implement your Solar PV Calculator using the Calculated Fields Form plugin across all 4 websites. Since the architecture, formulas, and premium plugin are already available, I can focus on accurate setup, conditional logic, validations, lead generation integration, and responsive styling that matches your existing website design. Thank you, Ranjika.
$100 USD in 7 days
7.8
7.8

Hi, I am an experienced WordPress developer with strong JavaScript, jQuery, HTML, and CSS skills, and I would be happy to help implement your Solar PV Calculator across all 4 WordPress websites. I have worked extensively with advanced WordPress form plugins, custom calculations, conditional logic, and lead generation systems. Since you already have the calculator architecture, formulas, JavaScript code, and the premium Calculated Fields Form plugin, I can focus on accurately integrating everything into your websites while ensuring performance, responsiveness, and seamless user experience. Lets connect and discuss in brief Regards Keshav
$150 USD in 4 days
7.7
7.7

Hi, I know you need a Solar PV Calculator added into your WordPress sites where users can calculate system size, cost, and payback based on their electricity usage, and I promise you will be happy with the result. If not, you do not pay. I will also provide support after delivery to make sure everything works smoothly across all 4 sites. I can build a fully functional solar calculator using the Calculated Fields Form plugin with all required inputs, conditional logic, and accurate JS-based formulas. The system will include dynamic calculations for panel size, system cost, battery storage (for off-grid), and roof space validation with proper warning alerts. I will integrate email/lead capture so users can request a PDF quote with their calculated results directly from the form. The result will be a clean, responsive solar calculator that works smoothly on all devices and is ready to deploy across your 4 websites. Please check out my profile to review my past projects and portfolio: https://www.freelancer.com/u/Hammadhassan21 I am available to start immediately. Ping me with the details and JavaScript files so I can begin. Thanks.
$115 USD in 7 days
7.8
7.8

⭐⭐⭐⭐⭐ Create a Solar PV Calculator for Your WordPress Sites ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for an experienced WordPress developer with strong JavaScript skills. Look no further; Zohaib is here to help you! My team has completed 50+ similar projects for WordPress and JavaScript. I will build the Solar PV Calculator efficiently, ensuring it meets all required features and integrates seamlessly with your sites. ➡️ Why Me? I can easily create your Solar PV Calculator as I have 5 years of experience in WordPress development, advanced JavaScript, and form plugins. My expertise includes user input handling, conditional logic, and responsive design. I also have a strong grip on HTML5 and CSS3, ensuring a clean layout that matches your website's theme. ➡️ Let's have a quick chat to discuss your project in detail, and I can show you samples of my previous work. I look forward to connecting with you! ➡️ Skills & Experience: ✅ WordPress Development ✅ JavaScript / jQuery ✅ Calculated Fields Form Plugin ✅ HTML5 / CSS3 ✅ User Input Validation ✅ Conditional Logic Implementation ✅ Responsive Design ✅ Form Integration ✅ Web Development Best Practices ✅ Debugging and Troubleshooting ✅ Project Management ✅ Attention to Detail Waiting for your response! Best Regards, Zohaib
$94 USD in 2 days
7.9
7.9

Hello, I’m excited about the opportunity to help you develop a Solar PV Calculator for your WordPress sites. From what you’ve described, it seems you need a tool that allows users in Greece to easily estimate their solar system size, cost, and payback period based on various inputs. I’d approach this by utilizing the Calculated Fields Form plugin to create an intuitive and responsive form that incorporates advanced JavaScript for accurate calculations. With 7+ years of experience in WordPress and JavaScript, I can implement the features you need, including conditional logic for battery storage and validation alerts for panel surface area. I also understand the importance of seamless lead generation integration for detailed PDF quotes. One question I have is about the specific formulas you plan to use for the calculations. Are they already defined, or would you like assistance in fine-tuning them? Best regards, Ivan Mandinski
$115 USD in 2 days
7.5
7.5

Hi, After going through the requirements, we noticed that the technical complexity of this project isn't in the form design itself; it's in accurately translating the solar sizing logic into a reliable calculator that produces consistent results across all four WordPress installations. The fact that the architecture, formulas, and Calculated Fields Form Premium license are already available significantly reduces project risk. The focus becomes implementing the logic correctly, handling conditional battery calculations for off-grid scenarios, validating roof-space requirements, integrating lead generation workflows, and ensuring the calculator remains responsive and easy to maintain. A couple of questions: • Are all four WordPress websites using the same theme/CSS framework, or will styling adjustments be required individually for each installation? • For the PDF quote request, do you already have an existing form/email workflow in place, or should the calculator results be dynamically passed into a new lead generation process? The project appears well-defined, which is always a positive sign, and we'd be interested in reviewing the calculation logic and architecture before discussing implementation details. Regards
$150 USD in 5 days
7.5
7.5

Hi As an experienced WordPress developer with a particular focus on JavaScript, I believe I am the ideal candidate to construct your solar calculator. Not only am I well acquainted with the Calculated Fields Form plugin that you wish to use, but I am also proficient in HTML5 and CSS, essential skills for flawless WordPress integration. My extensive experience in web development which spans over 11 years enables me to deliver efficient and robust solutions tailored to meet my clients' specific needs. Lastly, my dedication to providing responsive design solutions ensures that not only will your calculator be functional and reliable, but it will blend harmoniously with your existing website's aesthetics. With all these in mind, I eagerly look forward to engaging our combined efforts in powering the Greek into clean and affordable energy! Mahesh Kumar
$115 USD in 4 days
7.0
7.0

Hello, Your Solar PV Calculator needs careful WordPress setup, clean JavaScript logic, and reliable form behavior across all 4 sites. I can implement your ready architecture and scripts inside Calculated Fields Form Premium, including region based sun hours, net billing or off grid logic, roof space validation, cost estimates, battery calculations, email lead capture, and responsive styling. Will the same calculator formula and design be used on all 4 websites? I’d be pleased to discuss this further and get started for you as soon as possible. Happy to discuss how my previous project aligns with yours. ~Thanks! Joya
$80 USD in 7 days
7.1
7.1

As a seasoned web developer with an impressive background in HTML, CSS, JavaScript, and WordPress, I believe I have the necessary skills to take on your Solar Calculator project. Having successfully completed various WordPress projects using plugins like Calculated Fields Form Plugin and crafted complex forms using Advanced JavaScript/jQuery, my experience aligns perfectly with what you seek. I've developed numerous fully-functional websites with advanced features, including lead generation and conditional logic components that'll be essential for your solar calculator. My team also has comprehensive back-end knowledge in SQL which will come in handy as we merge your already created architectural plans. Having worked on Web Application projects specifically for both Net-Billing and Off-Grid functionalities before, we possess the expertise necessary to implement precise formulas for required kW power and battery Ah calculations. With regards to design, trust me to deliver a clean layout that resonates with your existing CSS theme; ensuring the calculator matches seamlessly with the four WordPress sites. In addition to fulfilling every requirement on your list, we offer something special - a commitment to put ourselves in our clients' shoes and deliver products beyond their expectations. Let's collaborate and bring this efficient solar calculator to life for the people of Greece. Looking forward to working
$140 USD in 7 days
7.1
7.1

Hello, I have strong experience with WordPress, JavaScript, jQuery, and the Calculated Fields Form plugin, and I can implement your Solar PV Calculator across all 4 WordPress websites. I will: • Configure all user inputs and conditional logic • Implement your existing JavaScript formulas accurately • Set up battery calculations for Off-Grid systems only • Add roof-space validation and warning messages • Integrate lead generation and PDF quote request forms • Match the calculator design to your website styling • Test and deploy across all 4 sites Since the architecture, formulas, and premium plugin are already available, I can focus on accurate implementation, responsiveness, and seamless integration. I can start immediately and deliver a clean, reliable solution. Best regards, Rakesh
$145 USD in 7 days
6.9
6.9

Having created and developed numerous WordPress websites over the past 12+ years, I am highly proficient in using the Calculated Fields Form plugin and can successfully craft your solar calculator according to your specifications. My knack for creating Advanced JS Formulas would be particularly advantageous in implementing the precise mathematical algorithms needed for power, panel quantity, battery Ah, and system cost calculations in your calculator. Moreover, my skills extend well beyond WordPress: I am adept at using HTML5, CSS3, Laravel, MySQL, and more. This extensive knowledgebase will ensure that your website not just integrates your solar calculator but also complements it harmoniously with the existing design theme.
$100 USD in 7 days
7.2
7.2

Hi there, You already have the calculator architecture, JavaScript logic, and the premium Calculated Fields Form license, so this is mainly about implementing it cleanly in WordPress across all 4 sites without breaking the UX. I can handle the conditional off-grid battery logic, advanced JS formulas, roof-space validation alerts, and lead form integration, while matching each install to your existing CSS theme and keeping it fully responsive. I’ve done a lot of custom WordPress feature work with JavaScript, ACF, Elementor, and custom plugin logic, so working inside an existing setup like this is straightforward. I can start quickly and would first review whether the 4 sites share the same theme/plugin stack so the calculator can be deployed efficiently across all of them. Please message me with the current site URLs and whether the same calculator logic/design will be used on every site.
$105 USD in 7 days
6.9
6.9

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. l believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.
$200 USD in 7 days
6.8
6.8

Hello! We can implement this solar calculator on your WordPress sites and adapt it to your current setup. 1. Are you open to working with an external contractor or team for these tasks? 2. Do all 4 WordPress sites use the same theme and plugin setup? — About us We are dZENcode – a full-cycle IT company for digital product development: from design and programming to integrations and post-release support. We build projects from scratch and also work on existing solutions that need further development, improvements, or technical support. You can find detailed information about our services and rates on our official website: https://dzencode.com. Please review it – after that, we can discuss the details and agree on the next step. ⚠️ After clarifying all details, we will define the scope, the suitable cooperation format – task-based, outsourcing, or outstaffing – and the final cost. Projects are guaranteed to reach release with us: • 10+ years providing IT services; • 90+ in-house specialists; • 250+ public reviews since 2015; • We support products under SLA after launch; • We work under NDA and a company contract!
$115 USD in 7 days
6.7
6.7

Hello, I can help with "Solar Calculator Development via WordPress "Calculated Fields Form" (Net-Billing & Off-Grid)" and keep the work clean and practical. My focus would be a maintainable WordPress/WooCommerce solution that fits your current setup. The listed skills point to PHP JavaScript WordPress CSS HTML5 CSS3 Frontend Development jQuery Lead Generation Web Application, so I would keep the implementation aligned with that. I can start by reviewing the existing access/files, then implement and test the requested changes. Before starting, I would confirm: What integrations should be connected first, and do you have API docs or test access ready? Which platform access will be available for setup, testing, and final handover? Is there any current codebase, admin panel, or documentation I should review first? Best regards, Houssame
$115 USD in 7 days
6.4
6.4

With a proven track record in getting top outcomes, I am the best fit for your Solar Calculator Development via WordPress project. My name is Ahmed Qazi. As a top WordPress developer in the industry, I have garnered extensive experience executing over 238+ projects, several of which were for major corporations and highly recognizable brands, across various sectors and countries. I specialize in using complex plugins like Calculated Fields Form with advanced JavaScript to create high-functioning calculators - that's just one of my areas of expertise. In addition, I bring HTML5/CSS3 and strong jQuery skills to ensure a responsive design that matches your website's CSS theme. Our goal here is a clean layout combined with the complex backend structure to deliver amazing results consistently. And it doesn't stop at just delivering solar calculator script; I offer more than just coding. As a well-rounded web developer, my services span full-stack development from UX/UI design to on-page/off-page SEO, site optimization and speed up - all important aspects for effective engagement, impressive experiences and visibility. Given my varied skill set and unwavering commitment to delivering quality solutions promptly, choosing me for this project means opting for exemplary results that align perfectly with your needs.
$100 USD in 2 days
6.3
6.3

Hello, I will develop a Solar PV Calculator using the Calculated Fields Form plugin on WordPress. The calculator will help users in Greece estimate solar system size, cost, and payback period with user inputs, conditional logic, advanced JS formulas, validation, and lead generation. Responsive design included. Please initiate the chat to discuss further details. Thanks
$80 USD in 4 days
6.2
6.2

Chania Crete, Greece
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