Size solar hot water with the numbers that hold up.

Size a domestic hot water system to real household demand, show the offset you can deliver, and back it with FSEC and SRCC certified numbers, then hand the customer a proposal.

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Certified sizing, not a rule of thumb.

Solar domestic hot water lives or dies on the sizing. Undersize it and the customer is disappointed, oversize it and you priced yourself out of the job. SunProjeX sizes the system to actual household demand and shows the solar offset you can deliver.

The math is grounded in FSEC and SRCC certified ratings, so the numbers you put in front of a homeowner, or an inspector, hold up. Then the design flows straight into a proposal, the same way pool heating does.

Sizing driven by real household hot-water demand
Solar offset shown clearly for the customer
FSEC and SRCC certified ratings behind the numbers
Design flows straight into a branded proposal
Combine with pool heating in a single project

The sizing engine

Demand in, certified design out.

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Demand-and-offset

Size to how much hot water the household actually uses, and show the offset solar can cover.

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FSEC and SRCC certified

Ratings a homeowner or inspector can trust, not a back-of-napkin estimate.

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Proposal built in

Turn the sized system into a proposal with e-signature and deposit options.

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Pairs with pool heating

One customer, one visit, two thermal systems proposed together.

Frequently asked questions

Do PV design tools size solar hot water?

No. Aurora, OpenSolar, and HelioScope are photovoltaic design tools. Solar hot water is a thermal system they do not size.

What certifications back the sizing?

SunProjeX grounds its sizing in FSEC and SRCC certified ratings so the numbers hold up with homeowners and inspectors.

Can it handle a combo pool and hot water job?

Yes. One project can carry both solar pool heating and solar hot water, proposed together.

More SunProjeX for solar thermal

Solar pool heating designSwim-season sizing and collector layout Solar thermal proposalsBranded proposals, e-sign, deposit CTAs Solar thermal design softwareThe whole thermal workflow in one tool SunProjeX vs Aurora SolarSolar thermal vs PV design SunProjeX vs OpenSolarSolar thermal design vs free PV SunProjeX vs HelioScopeSolar thermal vs commercial PV engineering

Design solar thermal the right way.

The only design and proposal software built for solar pool heating and hot water.

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