Solar tariffs and regulations, modelled market by market
SolarVis embeds tariffs and regulatory frameworks into your workflow, so you can design accurate, compliant systems and win more customers with detailed, reliable ROI projections. Netting, feed-in tariffs, VAT and export rules come pre-built for the US, UK, Germany, Türkiye, South Africa, Italy, Spain, France, Poland and the Netherlands, plus a configurator that extends to any other market.
Every market, every tariff, built in
Net metering, net billing, credit carry-over, feed-in tariffs and hourly or monthly netting all live in the tariff configurator, alongside time-of-use, tiered and demand charge structures. Tune currency, seasons, export rates and VAT, or build a brand-new tariff structure when a market changes the rules. Pre-built for the US, UK, Germany, Türkiye, South Africa, Italy, Spain, France, Poland and the Netherlands.
- Net metering, net billing, and credit carryover
- Time-of-use, tiered, and demand charge structures
- Per-country currency, seasons, and export terms
Trusted by
Five categories of regulatory intelligence
Not a reference list. A calculation layer. When you open a project for a specific country and facility type, solarVis applies the right rules automatically.
Billing rules
Pre and post-solar billing, time-of-use, and tiered pricing per country.
Export compensation
Net metering, net billing, credit carry-over, feed-in tariffs and hourly or monthly netting, with caps and settlement periods per market.
Fixed and demand charges
Standing charges, capacity terms and demand charges are billed on peak power or on the calendar rather than on consumption, so generation does not remove them. Modelled as separate lines so they stay visible in the proposal.
VAT and financial parameters
VAT rates, inflation escalation, and currency conversion applied to every calculation.
Compliance-ready financials
Embed current tariffs and regulations into every calculation so feasibility and ROI stay accurate and compliant as regulations change.
Pre-built for the US, UK, Germany, Türkiye, South Africa, Italy, Spain, France, Poland, the Netherlands and more. Any other market is fully configurable in the tariff configurator: tariffs, compensation mechanism, VAT and export rules.
Regulation changes the feasibility, not the other way around
Keep feasibility consistent across every market without a local spreadsheet
With tariffs and regulations supported across 45+ countries, teams keep feasibility consistent in every market. Multi-currency, 24 languages, one regulatory framework per market.
- Multi-currency
- Multi-language UI
- One regulatory source
See how a regulation shift hits ROI before it hits your customer
Same system, same location, different regulatory context. SolarVis shows the effect on ROI, payback, and 20-year savings the moment you switch regulatory scope.
- Live regulatory switching
- Side-by-side scenario compare
- Audit-friendly assumptions
Seven ways a market pays for the electricity you export
The mechanism, not the unit rate, is what decides whether a bigger array earns more. These are the seven the tariff engine models, and the markets each one applies to.
Netting with a regulated surplus price
Production and consumption are settled against each other over a set period, per hour for Turkish businesses since May 2026 and per month for households. Whatever surplus remains is bought at a regulated price minus a distribution fee, and businesses carry a cap on how much of it is paid for.
Feed-in tariff by capacity band
No netting at all. Every exported kWh earns a fixed payment set at commissioning and held for 20 years, with a lower rate for each capacity band above the first. A self-consumed kWh is worth several times an exported one, and that ratio is what decides the system size.
Net billing with a fixed export price
Imports are charged at the retail tariff and exports earn a separate, lower price. The credit usually reaches only the energy part of the bill and never the fixed or capacity charges, so self-consumption carries the return. This is the most common arrangement in the library.
Net billing with credit carry-over
As above, but unused credit rolls into later months instead of expiring with each one. Poland holds it in a prosumer deposit valid for twelve months and refunds only a capped share of whatever is left, which is a direct argument against oversizing.
Retail-rate net metering
One exported kWh cancels one imported kWh at the full retail price, with any surplus settled at year end for little or nothing. Still the rule across most of the United States, Canada, Mexico, Vietnam and Australia, and in Poland for plants connected before April 2022, but it is retreating almost everywhere.
Annual netting including taxes
The Dutch salderingsregeling nets a full year of imports against exports with the energy tax included, which is what made it the most generous scheme in the library. It ends in a single step on 1 January 2027, so a system quoted today spends most of its life under what replaces it.
Gross metering
Imports and exports are settled entirely separately, with no netting in between. Hungary moved new prosumers onto it in 2023 and buys exported energy at roughly one euro cent per kWh, which about doubled payback and made battery storage the main remaining lever.
Questions about regulations
Net metering cancels an exported kWh against an imported one at the retail price. Net billing prices the two separately, with export worth less, so self-consumption carries the return. A feed-in tariff pays a fixed amount for every exported kWh regardless of what the site consumes. The three produce very different system sizes on the same roof.
