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EmersonEIMS — Reliable Power. Without Limits.
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EMERSONEiMS

Engineering-grade reliability for East Africa's critical infrastructure. Power systems built to perform.

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ENGINEERED IN NAIROBI, KENYA
SUResourcesSolar & UPS Intelligence Hub
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  4. Combination Verifier

Combination Verifier

Enter your appliances, the quote you received and your budget. Get a verdict, find what is missing, and compare 10-year cost against a cheaper-safe and a premium alternative.

Combination Verifier · result Demo data

This combination will NOT work as quoted

Plain-language summary based on the products and loads you entered. Switch to Pro mode to see the engineering math.

Compliance
51.0/100
Quote vs. catalogue
+25.0%
Daily demand
8.9kWh
Step 1

Your loads

Tick what the system must run, set quantities, and we read the rest from the appliance library.

  • LED lighting (whole house)
    120 W · 6 h/day · critical
  • Refrigerator
    150 W · 24 h/day · critical
  • TV (LED 55")
    120 W · 5 h/day
  • Router + ONT
    25 W · 24 h/day · critical
  • Laptop
    60 W · 8 h/day
  • Clothes iron
    1,200 W · 0.30 h/day
  • Kettle
    2,200 W · 0.20 h/day
  • Microwave
    1,100 W · 0.30 h/day
  • Borehole pump 1 HP
    750 W · 2 h/day · critical
  • AC 1 HP
    900 W · 6 h/day
  • CCTV + alarm
    80 W · 24 h/day · critical
Step 2

Your quote

Enter the line items the vendor proposed and the price they charged you.

Step 3

Your budget

Findings

Risks and missing items

Highest severity first.

  • Battery undersized for evening demand
    Evening demand ~4.9 kWh; usable storage ~3.8 kWh (at 80% DoD).
  • No BMS-protected battery
    AGM/lead-acid without BMS — overdischarge will halve life. Specify Li-ion with manufacturer BMS for critical loads.
  • Quote far above benchmark
    Quote total 230,000 KES vs. catalogue 184,000 KES (+25.0%).
Capacity

Headroom & runtime

Inverter continuous headroom0.96 kW/ 2.21 kW
Battery evening cover3.84 kWh/ 4.92 kWh
PV daily generation9.35 kWh/ 8.94 kWh
Approx. battery runtime at full load3.08 h/ 12 h
ENG
Engineer-only section

Engineering math (continuous W, surge W, PV derate) — switch to Pro mode in the header to view.

Compare

Your quote vs. cheaper-but-safe vs. premium

10-year total cost using grid 28 KES/kWh and battery life 8 y (Li-ion) / 3 y (AGM).

Your quoteRisky
  • Inverter: 3.0 kVA
  • Battery: 4.8 kWh · no BMS
  • PV: 2.20 kWp
Capex230,000 KES
10-y total1,226,000 KES
KES/kWh effective37.57
Cheaper, safe alternativeBalanced
  • Inverter: 5.0 kVA
  • Battery: 7.0 kWh · BMS
  • PV: 3.30 kWp
Capex496,000 KES
10-y total496,000 KES
KES/kWh effective15.20
Premium alternativeLong life
  • Inverter: 5.0 kVA
  • Battery: 15.4 kWh · BMS
  • PV: 3.60 kWp
Capex656,000 KES
10-y total656,000 KES
KES/kWh effective20.10
Lifecycle

Cumulative cost over 10 years

Capex + grid + battery replacements.

Demo data
Cumulative KES
values in KES
Buyer education

What to demand before signing

Plain-language checks any buyer can use, even without an engineer present.

  • Manufacturer name AND model number on every line. "Equivalent" is not a model.
  • Warranty term in years AND who honours it (vendor or manufacturer).
  • Battery technology stated (Li-ion / LiFePO4 / AGM) plus cycle life.
  • Inverter surge rating in kVA for 5 s — not just continuous.
  • BMS for any lithium battery. No BMS = unsafe.
  • Single-line diagram + load schedule attached to the quote.
  • Earthing scheme + SPD spec — life-safety items, never optional.
  • Itemised labour and commissioning, not "as per site".

Need engineering depth? Run a full sizing in Smart Sizing, or audit the full quote in Quotation Audit.

One platform · 16 tools

Connected workspace

Continue the engineering loop — sizing, audit, intelligence, diagnostics, solar/UPS, library.

  • SimulatorSmart SizingOpen →
  • AuditQuotation AuditOpen →
  • CatalogueProduct IntelligenceOpen →
  • InstallInstallation VisualizerOpen →
  • AuthenticAuthenticity CheckOpen →
  • MaintainMaintenance PlannerOpen →
  • SafetySafety & FireOpen →
  • AbuseAbuse PredictorOpen →
  • PQPower QualityOpen →
  • LifecycleLifecycle CostOpen →
  • Docs PackDocumentation PackOpen →
  • LearnLearning ModeOpen →
  • DiagnosticsDiagnosticsOpen →
  • Solar/UPSSolar & UPSOpen →
  • LibraryLibraryOpen →
Sample values labelled Demo data·Hub v1.0.0-rc.1·staging·Reviewed 2026-05-03·Audit trail