Solar Power System Off Grid: Do You Need It? | Mars Solar

• In most cases, yes—but far less than before. A typical 10 kW solar power system off grid setup still produces 50-60 kWh per day in summer and 35-50 kWh in winter. If your household consumes 25-30 kWh daily, the solar array covers nearly all daytime usage and charges batteries for evening and overnight load.
• When You Can Eliminate the Grid
  Fully off-grid solar power system installations work for households consuming 10-30 kWh per day with adequate roof space (30-60 m²) and reliable solar irradiance. These setups require battery banks sized for 2-3 days of autonomy. Common off-grid locations include remote Philippines, Nigeria, and Caribbean islands where grid extension is impractical or unreliable.
• Off-grid systems eliminate the monthly electricity bill entirely but require careful sizing. Battery cost represents 40-60% of total system cost—right-sizing matters more than over-building. A common mistake is installing too many panels without enough battery storage, leading to chronic undercharge in winter months.
• Hybrid: The Best of Both Worlds
  Uma instalação híbrida de energia solar da Mars Solar, do tipo «off-grid», mantém-se ligada à rede elétrica como fonte de reserva, mas recorre primeiro à energia solar, depois às baterias e, por último, à rede. Esta configuração cobre 90% da produção solar durante as horas de maior insolação e só recorre à rede durante períodos prolongados de céu nublado.
  Hybrid systems are ideal for buyers who want energy independence without the risk of running out of power. Grid connection serves as insurance—you maintain power indefinitely, but monthly electricity bills drop by 60-90% depending on system size and consumption pattern. Net metering policies in some regions even allow you to sell excess power back to the utility for credit.
• Grid-Tied: Cheapest but No Backup
  Um sistema de energia solar ligado à rede com configuração de reserva fora da rede é a opção mais económica. Não são necessárias baterias, pelo que o custo inicial é 30-50% inferior ao de um sistema híbrido. No entanto, o sistema desliga-se durante as falhas de rede por razões de segurança. Os compradores em regiões com redes estáveis e cortes de energia raros optam frequentemente por esta configuração para obter o máximo retorno do investimento.
• Mars Solar kits support all three configurations—grid-tied, off-grid, and hybrid. Share your location, monthly bill, and outage frequency with our engineers, and we’ll recommend the right setup for your specific situation.