Less manual checking
Readings, invoices, payments, and balances stay connected in one customer history.
Generator & electricity billing software
Run monthly generator billing without Excel chaos.
VoltaLog by MDS is a focused Windows application for generator and subscription-based electricity offices. Manage customers, meter readings, tariffs, invoices, receipts, payments, balances, reports, backups, and licenses from one clean system.
Windows desktopWorks offlineInvoices & receiptsExcel-friendly reportsLocal support
Best for local generator offices, private electricity providers, and subscription billing teams.
One office systemCustomers, cycles, readings, invoices, payments, reports, and backups.
Offline readyRuns locally on Windows without depending on live internet.
Less mistakesConnect readings, tariffs, payments, receipts, and balances.
Built localDesigned around real generator and power subscription workflows.
Stop running monthly billing from scattered spreadsheets.
Manual files become risky: wrong balances, lost receipts, repeated customer checks, unclear payments, and slow monthly closing. VoltaLog keeps the monthly process controlled from start to finish.
Faster customer answers
Answer invoice, receipt, balance, and payment questions without searching many files.
Better cycle control
Cycles, subscriptions, amperage, tariffs, and collections follow the real office workflow.
Everything a billing office needs every month.
VoltaLog is built around customer setup, readings, invoice generation, collections, receipts, and reports.
Customer management
Customer details, meter IDs, mobile numbers, addresses, active status, and subscription history.
Two billing models
Fixed subscriptions and fixed + kWh consumption billing with amperage and tariff history.
Meter readings
Track previous/current kWh readings and connect them to the correct billing cycle.
Invoices and receipts
Issue invoices, record payments, print receipts, and track customer balances.
Reports and Excel
Prepare customer lists, invoice details, receipts, statements, and Excel-friendly reports.
Backups and licensing
Local data protection, controlled licenses, and easy public release downloads.
Clear plans for every generator office.
Choose the first-year package for best value, or ask to start monthly from day one with no upfront yearly payment.
Standard
For a small office starting with one Windows computer.
$100includes first year, then $15/month support- 1 PC license
- Customer management
- Meter readings
- Invoices and receipts
- Basic updates and support
- Up to 300 Subscribers
Pro
For active offices that need stronger reporting and faster assistance.
$150includes first year, then $20/month support- Everything in Standard
- Reports and Excel-friendly output
- Backup guidance
- Priority support
- Priority fixes and updates
Premium
For offices that want extra setup help, workflow support, and expansion planning.
$200includes first year, then $30/month support- Everything in Pro
- Advanced setup assistance
- Workflow training
- Extra support time
- Expansion and multi-PC guidance
Alternative: monthly from day one
Prefer not to pay the first-year package upfront? Customers can start with a monthly subscription from the first month. This option includes the software license, updates, and support while the subscription is active.
Standard monthly$25/month
Pro monthly$35/month
Premium monthly$50/month
Best value: the first-year package is recommended because it covers installation, activation, and the first year of support. The monthly-only option is available for customers who prefer a smaller starting cost.
Suggested license policy: demo licenses should be time-limited. Paid customers receive a first-year license with the initial payment, then renewable licenses after the monthly support period starts. Monthly-only customers receive renewable licenses while the subscription is active. Permanent licenses can be reserved for special paid ownership deals.
Example: Pro plan first year
A Pro customer pays $150 once for installation, activation, and the first year of support. After the first year, support continues at $20/month. Or, the customer can choose the monthly-only Pro option at $35/month from day one.
First payment option$150
First year supportIncluded
Monthly-only option$35/month
Why customers choose VoltaLog.
VoltaLog is not a generic accounting package. It is made for generator and electricity subscription billing.
Practical workflow
Built around customers, amperage, readings, cycles, invoices, receipts, and monthly collections.
Simple deployment
Install it on a Windows PC, license it, and start entering customers without complex server setup.
Local business fit
Supports the kind of pricing, billing, and customer questions generator offices handle every month.
Ready to test VoltaLog?
Start with a demo, install it on the customer PC, then activate the license that matches the customer plan.
Request demo / license
Contact MDS to arrange installation, demo testing, license activation, and support plan selection.
Questions customers ask.
Short answers for buyers comparing VoltaLog with manual spreadsheets or generic software.
Does it need internet?
The desktop app is designed for local Windows operation. Internet is mainly useful for downloads and support.
Can I export to Excel?
The system is designed to be Excel-friendly for reports and operational lists.
Is the source public?
No. This is only the public product and release page. The source code remains private.