Solar ESS, Solar Energy for Sustainable Solution

Quotation

What a Solar ESS
quotation looks like.

Real quotations, proposals and drawings with the customer names taken out, so you can see the scope, terms and level of detail we put in writing. For a price on your own site, book a consultation.

First page of the return-on-investment study for a home paying 5,000 THB a month

Sample study · 3 pages · PDF · English, Thai

A home paying 5,000 THB a month: which solar system pays back best?

Three single-phase hybrid systems, each with and without a 16 kWh battery, simulated hour by hour against a 5,000 THB bill. Surplus solar cannot be sold to PEA, so a bigger system is not always better.

  • Option 1: Solis 6 kW + 6.03 kWp · Option 2: Solis 6 kW + 10.05 kWp · Option 3: Solis 10 kW + 16.08 kWp, AIKO 670 W panels
  • Saving, bill after solar, ROI per year, payback and 25-year net gain for all six setups
  • Two homes compared: most power used in the evening, or someone at home in the daytime
  • Best overall: Option 2 with the battery, bill down 70–90%; best value: Option 1 with the battery

Customer details and prices have been removed from this sample.

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First page of the off-grid café and homestay energy study

Sample study · 21 pages · PDF · English, Thai

Off-grid solar for a café and homestay: energy study and four solutions compared

We surveyed every appliance in an existing house and a new guest building, worked out why both should share one off-grid system, and compared four ways to build it, two at a time, before recommending one.

  • 66.1 kWh a day for the whole site, 48 kWh of it at night; 16.4 kW design peak
  • The ideal “no-worry” size: 45.4 kWp, three 10 kW inverters, 80 kWh of battery
  • Four real options compared on rainy-season solar, night battery, inverter margin and warranty
  • String design and full bill of materials for each option

Customer details and prices have been removed from this sample.

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First page of the off-grid café and homestay proposal

Sample proposal · 5 pages · PDF · Thai

Off-grid proposal for a café and homestay: one system for both buildings

The recommended option from the study above, written up as a proposal: one off-grid system that powers the old house and the new building 24 hours a day.

  • 29.8 kWp of panels, two Solis 10 kW single-phase hybrid inverters
  • Four Solis IntelliHome 16 kWh batteries (64 kWh, 57.6 kWh usable), outdoor-rated
  • Positive margin in every season; generator backup through an ATS
  • Scope, warranty terms and conditions of the offer

Customer details and prices have been removed from this sample.

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First page of the sample 62.4 kWp on-grid quotation

Sample quotation · 6 pages · PDF · Thai

62.4 kWp on-grid solar for a factory, metal-sheet roof, zero export

A full bill of materials for a daytime process load of about 20–22 kW (tube-ice machine and compressor), with zero-export protection so no power flows back to the grid.

  • 96 × LONGi Hi-MO X10 Guardian 650 W anti-glare bifacial panels, Huawei SUN2000-50K-MC0 inverter, 1/2/2/1 string layout
  • About 89,300 kWh a year; zero-export meter and FusionSolar 4G monitoring
  • Metal-roof mounting, DC and AC protection, earthing, conduit and cabling itemised line by line
  • Installation, testing to IEC 62446, panel cleaning twice a year for 5 years, payment and general conditions

Customer details and prices have been removed from this sample.

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First page of the solar packages by house size

Sample packages · 8 pages · PDF · English

Solar packages by house size: small, medium and large

Grid-tied hybrid systems with zero export and a modest battery that keeps the daytime surplus for the evening, sized for three typical houses from an hourly load model.

  • Small house, 1-phase: 3.9 kWp, 6 kW inverter, 5.12 kWh battery
  • Medium house, 3-phase: 10.4 kWp, 10 kW inverter, 16 kWh battery
  • Large house, 3-phase: 13.0 kWp, 15 kW inverter, 16 kWh battery
  • Load lists, daily energy charts, estimated savings and bill of materials

Prices are not shown; ask us for a quotation for your house.

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First page of the sample quotation

Sample quotation · 2 pages · PDF · Thai

I-V curve testing and power measurement for rooftop solar PV

Performance testing of two hotel rooftop plants in Bangkok (158.40 kWp, 21 strings, and a 14-string plant) with an I-V curve tracer, plus electrical measurement with an HT Instruments GSC60 power analyser.

  • Every string traced and recorded, with the I-V curves analysed
  • Voltage, current, kW / kWh and power factor logged over the site visit
  • A written report of results and technical observations
  • Payment terms: 50% on order, 50% on completion and handover

Customer details and prices have been removed from this sample.

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Single-line diagram of two off-grid solar sets with a generator and ATS

Sample drawing · single-line diagram · A3 · English and Thai

Off-grid solar with generator backup through ATS

Two off-grid solar sets feed their own houses on ATS source A; one generator feeds ATS source B of both, and takes over automatically when the inverters are off.

  • Set A: one Solis 10 kW single-phase inverter with battery
  • Set B: two Solis 10 kW inverters in parallel on a shared battery
  • Generator bus with MCCB protection to each ATS
  • Cable, breaker and ATS ratings with design notes

Customer names have been removed from this sample.

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First page of the sample off-grid proposal

Sample proposal · 3 pages · PDF · Thai

Off-grid solar for a café and homestay

A full off-grid design for a café, kitchen, house and guest rooms, sized from the real load list hour by hour, with the costs on page one and the sizing behind them after.

  • 28 loads: 35 kWh a day, 19.5 kWh of it at night
  • 15.6 kWp of LONGi panels, two Solis 10 kW inverters, 32 kWh LiFePO4
  • Electrical parts, installation and a 2-year installation warranty included
  • Total about 505,100 THB

Customer names have been removed from this sample.

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First page of the sample off-grid proposal

Sample proposal · 3 pages · PDF · Thai

Off-grid solar for four new guest rooms

A separate off-grid system for four new rooms with air conditioners, fans and lights, used mostly at night, so the battery carries most of the design.

  • 28.4 kWh a day, 27.3 kWh of it at night
  • 11.7 kWp of panels, one Solis 10 kW inverter, 48 kWh LiFePO4
  • Electrical parts, installation and warranty terms included
  • Total about 476,450 THB

Customer names have been removed from this sample.

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First page of the sample off-grid proposal

Sample proposal · 3 pages · PDF · Thai

Combined off-grid system: one source for all loads

The café, house and new guest rooms combined on one off-grid source that distributes power to every building.

  • 35 loads: 63.7 kWh a day, 46.8 kWh at night, 19.1 kW worst-case peak
  • 25.35 kWp (39 × 650 W), two Solis 16 kW single-phase inverters, 80 kWh LiFePO4
  • Sub-distribution boards and feeders to each building
  • Total about 940,725 THB

Customer names have been removed from this sample.

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First page of the solar water pumping cost summary

Sample proposal set · 6 documents · PDF · English and Thai

Solar water pumping: well, pump and solar options

A 4-inch borehole with a TORQUE pump lifting water 30 m uphill over 200 m to a hilltop tank, with three ways to power it and a full bill of materials for each system.

Customer names have been removed from these samples.

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