01
Load & energy planning
List running and starting loads, daytime consumption and overnight needs. Roof space, shading and cable routes affect the system design.
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BM CONTRACTORSENGINEERING · TANZANIASolar & battery systems
Power shaped around your day.
BM helps assess and install solar power systems around actual consumption, roof or ground space and the intended role of batteries and grid supply. System sizing follows the load assessment.
Discuss your requirements Have a BOQ or institutional RFQ? ↗
A CONSIDERED SCOPE
Energy in. Useful power out.
Who is it for?
Homes, offices and facilities seeking daytime solar supply or a planned combination of solar, battery storage and other power sources.
Your quotation should set out the assessed equipment, installation, documentation and agreed delivery terms.
02
Hybrid operation & batteries
Discuss inverter/battery compatibility, usable capacity, protection and changeover behavior. Ask for a defined operating scenario rather than an unsupported autonomy promise.
EQUIPMENT & APPROACH
Selection follows the requirement.
Solar modules, mounting system, compatible inverter and battery where specified, DC/AC isolation and protection, cabling and monitoring.
Explore equipment & specification guidance ↗Assessment, installation & handover
Record appliance power and operating hours, inspect shading and mounting space, then agree usable energy and backup priorities. Installation includes agreed protection, functional checks and user guidance.
Maintenance & ongoing care
Monitor output and alarms, keep access safe and follow manufacturer cleaning and battery guidance. Investigate persistent performance changes rather than assuming more panels will solve them.
THE TECHNICAL BRIEF
Design around energy use, not panel count.
Solar PV enquiries need a daily load profile, roof or ground information and a clear decision about which loads must remain powered during an outage.
| Option / application | What to assess |
|---|---|
| PV module selection | Compare exact module technology and datasheet, dimensions, shading and mounting. A higher nameplate wattage does not alone establish daily energy yield. |
| Grid-tied, hybrid or off-grid | A grid-tied system does not automatically provide backup during a power cut. Inverter topology, isolation and supported backup circuits must be explicit. |
| Battery storage | Compare usable energy, chemistry, charge/discharge limits, inverter/BMS compatibility and operating conditions; do not mix incompatible battery types. |
The whole system
Assess string voltage/current limits, roof suitability, mounting, DC/AC protection, earthing, cable routes and access. Monitoring, documentation and the owner’s shutdown procedure belong in handover.
Maintenance and integration
Plan panel inspection/cleaning access, alarm checks and battery care according to the selected equipment. Generator integration requires verified inverter/charger support and an agreed changeover arrangement; it is not automatic because both sources produce electricity.
How many panels will run my premises?
List appliances, their demand, operating hours and starting loads first. The design must account for sunlight, shading, losses and backup priorities before a panel or battery quantity can be quoted.
Equipment references & manufacturer documentation
These references help compare systems. They do not establish BM stock, dealership, partnership or model availability. Confirm equipment, compatibility and supply terms in the quotation.
- Sunova Solar ↗N-type modules; S / M / L size families
- Ritar ↗AGM; RL; DC
- Chloride Exide ↗Solar batteries; PowerLast; third-party solar equipment
BEFORE YOU DECIDE
Questions worth asking.
Do I need batteries?
That depends on when power is needed and whether backup is part of the requirement. Daytime consumption and power-cut needs should be assessed separately.
Can an existing inverter be retained?
Share its exact model and battery details. Electrical compatibility and manufacturer requirements must be checked before integration is proposed.
BRING US YOUR BRIEF
A better brief. A useful next step.
- Electricity bills and appliance list
- Required backup hours and priority circuits
- Roof/ground space and shading